It is our great pleasure to announce the awardees of 2024 Nano Research Young Innovators(NR45)in nanomaterial self-assembly.Nano Research initiated the NR45 program in 2018 to recognize outstanding young researchers u...It is our great pleasure to announce the awardees of 2024 Nano Research Young Innovators(NR45)in nanomaterial self-assembly.Nano Research initiated the NR45 program in 2018 to recognize outstanding young researchers under 45 years of age across diverse fields of nanoscience and nanotechnology.This initiative celebrates their exceptional achievements and potential to advance their respective disciplines through groundbreaking contributions.Awardees are selected via a rigorous competitive process by an award committee comprising members of the journal’s editorial board.The 2024 NR45 Awards focus on nanomaterial self-assembly,honoring 24 innovators for their transformative contributions to this dynamic field.This special issue features 12 review articles and 12 research papers from these distinguished awardees.展开更多
Erratum to:Nano Research,2023,16(5):7075-7084,https://doi.org/10.1007/s12274-022-5264-8.The article Research on GGT-responsive drug carrier with active transport effect,written by Han Yan et al.,was erroneously origin...Erratum to:Nano Research,2023,16(5):7075-7084,https://doi.org/10.1007/s12274-022-5264-8.The article Research on GGT-responsive drug carrier with active transport effect,written by Han Yan et al.,was erroneously originally published electronically on the publisher’s internet portal(currently SpringerLink)on 3 January 2023 with Fig.8.展开更多
Advanced aerogel fibers possess numerousadvantages amalgamating the attributes of aerogels and fibermaterials, rendering them invaluable in the realm of thermalmanagement and regulation. However, the achievement ofrob...Advanced aerogel fibers possess numerousadvantages amalgamating the attributes of aerogels and fibermaterials, rendering them invaluable in the realm of thermalmanagement and regulation. However, the achievement ofrobust mechanical properties and increased temperaturestability is still a major challenge for the majority of aerogelfibers. Herein, SiO_(2)-Kevlar hybrid aerogel fibers with bioniccore-shell structure were prepared by reaction spinning andweaved into fabric. Kevlar nanowires dispersion is pumpedinto a bath comprising a self-synthesized silica sol, whichfacilitates the hybridization of biphasic aerogels through thegel reaction. Precise control over the diameter (200-800 μm)and structure of the wet gel fibers was achieved throughmeticulous adjustment of the spinning solution composition and spinning parameters. Subsequent freeze-drying processfacilitates the formation of a core-shell hybrid structure, in which the SiO_(2) aerogel layer effectively encapsulate the Kevlaraerogel core fiber. Taking full advantage of the mechanical properties of the Kevlar core fiber, the resulting SiO_(2)-Kevlaraerogel fibers exhibit commendable weaving characteristics (51.8 MPa). Furthermore, SiO_(2)-Kevlar aerogel fabrics exhibitenhanced thermal insulation characteristics with a thermal conductivity of 0.037 W/(m·K). As a result of the presence ofexternal SiO_(2) aerogel layer, the overall temperature resistance performance of the SiO_(2)-Kevlar fabric reach up to 700 ℃.展开更多
The development of high-performance atomiccatalysts for the carbon dioxide reduction reaction(CO_(2)RR)is atime-consuming process due to the complexity of the reactionmechanism and the uncertainty of the active site.H...The development of high-performance atomiccatalysts for the carbon dioxide reduction reaction(CO_(2)RR)is atime-consuming process due to the complexity of the reactionmechanism and the uncertainty of the active site.Herein,wehave proposed combining density functional theory(DFT)andmachine learning(ML)to investigate the potential of topologicalgraphene-based dual-atom catalysts(DACs)as CO_(2)RRelectrocatalysts.By analyzing the ML results,we identify thenumber of d-orbital electrons in the active site as a key factorinfluencing the CO_(2)RR catalytic activity.Additionally,wepropose a simple descriptor to measure the CO_(2)RR activity ofthese DACs.Our findings provide plausible explanations for thesynergistic interactions between bimetallic atoms in CO_(2)RR andallow us to screen the homogeneous Ni-Ni pair as the mostpromising dual-atom catalysts.This work offers a fast MLapproach based on limited DFT calculations to predict the mostelectroactive and stable DACs on carbon support for CO_(2)RR,facilitating rapid screening of high-performance dual-atomcatalysts.展开更多
The constituents and geometric design of cathodic electrocatalyst to achieve high activity and durability are effective but challenging for the development of high-performance Li-O_(2)batteries.This study employs a mi...The constituents and geometric design of cathodic electrocatalyst to achieve high activity and durability are effective but challenging for the development of high-performance Li-O_(2)batteries.This study employs a mild solution precipitation method followed by thermolysis to construct a faveolate open-structured Ru-N/C matrix with a loosely braided network morphology as a bifunctional cathode.The details prove that this hybrid structure is composed of ultrafine Ru globular nanoparticles(ca.2 nm)coated with an N-enriched carbon film and exhibits a valuable beehive through-hole character for rapid mass transport during oxygen redox catalysis.The synergistic effect of open-structured and reticular network matrix with metal-N4 coordination induces asymmetric charge distributions with moderate adsorption/desorption behaviour with oxygen intermediates.Consequently,this particular Ru-N/C matrix cathode provides a promising Li_(2)O_(2)accommodation space and exhibits superior electrochemical performance in terms of a positive discharge plateau and low charge overpotential.Besides,the assembled batteries also present a high discharge capacity and a long cycle life(exceeding 283 cycles).The density functional theory(DFT)calculations also corroborate the assertion that the Ru-N/C catalyst exhibits robust electronic coupling transfer and superior bifunctional activity.As such,our work demonstrates that this type of open-structured Ru-N/C matrix is promising for fabricating high-performance quasi solid-state Li-O_(2)batteries.展开更多
Photothermal CO_(2) hydrogenation is a promising route to produce methanol as a sustainable liquid solar fuel.However,most existing catalysts require a combination of solar irradiation and additional heat input to ach...Photothermal CO_(2) hydrogenation is a promising route to produce methanol as a sustainable liquid solar fuel.However,most existing catalysts require a combination of solar irradiation and additional heat input to achieve a satisfactory reaction rate.For the few that can be driven solely by light,their reaction rates are one order of magnitude lower.We develop a photothermal catalyst with multilevel interfaces that achieves improvedmethanol production from photothermal CO_(2) hydrogenation without external heat.The catalyst features a layered structure comprising Cu/ZnO/Al_(2)O_(3)(CZA)covered by oxidized carbon black(oCB),where the oCB/CZA interface promotes efficient heat generation and transfer,and the Cu/oxide interface contributes to high catalytic activity.Under a mild pressure of 8 bar,our oCB/CZA catalyst shows a methanol selectivity of 64.7%with a superior production rate of 4.91 mmol-geza-1-h-1,at least one order of magnitude higher than other photothermal catalysts solely driven by light.This work demonstrates a photothermal catalyst design strategy for liquid solar fuel production.展开更多
Resource recovery for the preparation of high-value-added products represents a promising strategy for reducing pollution and carbon emissions.In this study,stainless steel pickling wastewater was utilized as a metal ...Resource recovery for the preparation of high-value-added products represents a promising strategy for reducing pollution and carbon emissions.In this study,stainless steel pickling wastewater was utilized as a metal source to synthesize MIL-100(Fe),which was subsequently transformed into quasi-MIL-100(Fe)(Q350-MIL-100(Fe))through controlled pyrolysis at an optimized temperature of 350°C.The as-prepared Q350-MIL-100(Fe)demonstrated exceptional performance in activating peroxymonosulfate(PMS)under ultraviolet(UV)light irradiation,enabling the efficient degradation of various organic pollutants.Compared to pristine MIL-100(Fe),Q350-MIL-100(Fe)exhibited a 41.56-fold increase in the degradation rate constant for atrazine(ATZ),attributed to its narrower bandgap,abundant exposed active sites,and hierarchical porous structure.Furthermore,a self-constructed reactor employing Q350-MIL-100(Fe)/graphite felt(GF)as an immobilized catalyst achieved continuous and complete(100.0%)ATZ degradation for up to 96.0 hours.This work provides valuable insights into the sustainable utilization of industrial wastewater to produce high-value-added functional materials for environmental remediation,aligning with the dual goals of pollution control and resource recovery.展开更多
Molecular catalysts with well-defined single atom sites and coordination environments exhibit significant potential as oxygen reduction electrocatalysts,but suffering from the activity and stability issues.Herein,the ...Molecular catalysts with well-defined single atom sites and coordination environments exhibit significant potential as oxygen reduction electrocatalysts,but suffering from the activity and stability issues.Herein,the ultrathin carbon shell supported FePc molecule electrocatalysts(FePc/TA-ONG-N),featuring with a direct oxygen bridging between FePc and carbon substrate,were designed and synthesized.The direct connection with oxygen atom on carbon substrate,certified by the Fourier transform infrared spectroscopy(FTIR)and extended X-ray absorption fine structure(EXAFS),can remarkably enhance the interaction and facilitate electron transfer from Fe,leading to an improved activity by reducing adsorption strength of intermediate species through lowering the d-band center position.The resultant half-wave potential of 0.902 V together with a Tafel slope of 23.64 mV·dec^(−1)is superior to Pt/C and control samples.Such catalyst holds a promise as air-cathode electrocatalyst in Zn-air battery with excellent operation stability exceeding 80 h.The density functional theory(DFT)calculations and molecular dynamic simulations unveiled that the O-bridge can effectively stabilize the FePc molecule and function as electron buffer to donate/gain electrons to/from Fe atom during the adsorption of oxygenates.The current findings are insightful for developing molecular catalysts with high performance through substrate engineering and axial coordination.展开更多
The bulky footprint of near-infrared(NIR)spectrometers has been limiting their applications in portable and movable systems for probing molecular compositions and structures.Quantum dot(QD)computational spectrometers ...The bulky footprint of near-infrared(NIR)spectrometers has been limiting their applications in portable and movable systems for probing molecular compositions and structures.Quantum dot(QD)computational spectrometers are a promising strategy for miniaturized NIR spectrometers,whose performance is limited by the poor spectral encoding matrix and,ultimately,the poor quality of PbS QDs.Here,we show that the monodispersity and finely controlled absorption peak of PbS QDs are critical parameters affecting the spectral resolution and noise resistance.Thus,a facile synthesis of a series of monodisperse PbS QDs from a single batch is developed using cation exchange synthesis in a seeded-growth manner.All the as-synthesized PbS QDs have narrow size distributions of below 4%,and the peak intervals can be controlled to within 3 nm.Furthermore,stable PbS QD inks are prepared by considering the compatibility between QD ligands,solvents,and polymers.The PbS QD filter array is fabricated using a contact printing method,exhibiting supreme transmittance curves and a spectral encoding matrix.The filter array is coupled with an InGaAs image sensor to form the QD NIR computational spectrometer.Thanks to the high-quality PbS QDs,the QD spectrometer shows a high spectral resolution of 1.5 nm in a broad wavelength range of 900−1700 nm and excellent spectral reconstruction of narrow and broad spectra with fidelities of above 0.987.Additionally,the QD spectrometer is applied to distinguish materials and accurately measure the alcohol content of white wines,demonstrating the great potential for practical applications of QD NIR spectrometers.展开更多
With the advancement of modern communication technology and military detection technology,there is an urgent need to develop lightweight,flexible,multifunctional composites that integrate efficient infrared(IR)stealth...With the advancement of modern communication technology and military detection technology,there is an urgent need to develop lightweight,flexible,multifunctional composites that integrate efficient infrared(IR)stealth,electromagnetic interference(EMI)shielding,and Joule thermal properties.Nevertheless,the preparation of multifunctional composites with the above properties remains challenging.Herein,multifunctional aerogel films were designed through potassium ionic cross-linking of MXene and aramid nanofiber(ANF),forming an enhanced interpenetrating double-network ANF/MXene-K^(+)(AMK)aerogel.The aerogel film possesses extremely low infrared emissivity(~0.097),reducing radiation temperature by more than 89.7%with 9.2 MPa tensile strength.Furthermore,the film exhibits excellent Joule heating performance,including low driving voltage(1.0 V),fast thermal response(<12.0 s),and long-term stability.Concurrently,the interpenetrating double-network structure of potassium ion-induced self-assembly of MXene nanosheets enabled AMK to demonstrate enhanced electromagnetic shielding(72.4 dB).Overall,this work provides a promising solution for fabricating multifunctional materials and demonstrates their potential in adaptive thermal camouflage systems,next-generation wearable thermal management,and EMI shielding of electronic devices.展开更多
Recent studies support that magnetic chiral nanozymes,integrating the features of chirality,magnetism,and enzyme-like catalysis,provide new insights into the synthetic methodologies and applications of chiral nanozyme...Recent studies support that magnetic chiral nanozymes,integrating the features of chirality,magnetism,and enzyme-like catalysis,provide new insights into the synthetic methodologies and applications of chiral nanozymes.In this study,we present the design of novel magnetic chiral cobalt superstructures(CoSSs)synthesized by the regulation of complex formation kinetics of Co3+with chiral ligands(L-or D-tartaric acid)under varying metal-to-ligand molar ratios and solvent polarity.This approach yielded a series of CoSSs with varying symmetry from high to low.The chiral CoSSs exhibited chirality-dependent peroxidase(POD)-like activity,demonstrating a high affinity of L-CoSSs towards substrates,with a chiral selective factor of approximately 1.37.In addition,the magneto-optical effects of the chiral CoSSs significantly enhanced their chiroptical performance from ultraviolet-visible(UV-vis)to near-infrared region.Under a magnetic field,the affinity of chiral CoSSs for substrates increases,while the chiral selective factor was modified to 0.76.This research on magnetic chiral CoSSs nanozymes opens promising new avenues for the application of artificial enzymes in fields,such as antibacterial technology,drug delivery,and biocatalysis.展开更多
Lithium iron phosphate(LFP)offers excellent structural and performance stability derived from the(PO_(4))^(3-)polyanionic structure,which is beneficial for long-term usage.However,this inherent stability also comes al...Lithium iron phosphate(LFP)offers excellent structural and performance stability derived from the(PO_(4))^(3-)polyanionic structure,which is beneficial for long-term usage.However,this inherent stability also comes along with intrinsically poor ionic and electronic conductivities,which have been notoriously plaguing its high-rate performance and broader applications.Here,we present a gas-assisted transient synthesis(GATS,~30 s)of LFP with controllable oxygen vacancies(O_(v))for enhanced rate performance yet without sacrificing structural integrity or cycling stability.Benefited by the ultrafast heating and a higher synthesis temperature,we revealed that the LFP synthesis in GATS followed an interface reaction mechanism(rapid core shrinking)with a low activation energy(E_(a)),thus reducing the synthesis time from~16.5 h in tube furnace heating(TFH,often nuclei-growth mechanism)to merely seconds.The optimized LFP sample demonstrates an 8-fold enhancement in ionic conductivity and a 12-fold increase in electronic conductivity compared to LFP obtained by TFH and attains exceptional cycling stability even at high rates of 10 C,as evidenced by a higher capacity retention of 93.8%(vs.63.6%of commercial LFP)after 1000 cycles.Our strategy offers a kinetic pathway for rapid synthesis and structural engineering of LFP,thus unlocking its potential for broader energy storage applications.展开更多
Poly(1,3-dioxolane)(PDOL)-based solid electrolytes hold great potential for solid-state lithium(Li)metal batteries due to their superior ionic conductivity at room temperature.However,traditional PDOL electrolytes suf...Poly(1,3-dioxolane)(PDOL)-based solid electrolytes hold great potential for solid-state lithium(Li)metal batteries due to their superior ionic conductivity at room temperature.However,traditional PDOL electrolytes suffer from inferior thermal stability,which has hampered their practical application.In this work,a competitive coordination mechanism is proposed to strengthen vulnerable ether oxygen bonds in PDOL chains,thereby improving the thermal stability of PDOL electrolytes.The strong coordination of Lewis base ligands on Li_(6.75)La_(3)Zr_(1.75)Ta_(0.25)O_(12)(LLZTO)surface with Li ions weakens the ionic-dipolar interactions between PDOL chains and Li ions,conversely reinforcing the bond energy of ether oxygen bonds.Incorporating LLZTO into PDOL electrolytes effectively enhances the thermal decomposition temperature from 110 to 302℃.Li||LiFePO_(4)full cell with a 12μm ultrathin PDOL hybrid electrolyte delivers enhanced discharge capacity and extended cycling life for 100 cycles at an elevated temperature of 60℃.This work provides critical insights into the development of thermally stable PDOL electrolytes for safe solid-state Li metal batteries.展开更多
Hepatic ischemia-reperfusion injury(IRI)is an intricate and inevitable physiological event occurred in the liver transplantation(LT)and it is of paramount importance to devise novel and efficient methods to ameliorate...Hepatic ischemia-reperfusion injury(IRI)is an intricate and inevitable physiological event occurred in the liver transplantation(LT)and it is of paramount importance to devise novel and efficient methods to ameliorate IRl.Herein,we report a"one stone for two birds"strategy for IRI therapy.In this study,we engineered carvacrol-artesunate(CAR-ART)nanoparticles(CANPs)utilizing CAR and ART as precursor monomers and simulated IRl in an in vivo mouse model.Our research results indicate that CANPs proficiently surmount the constraints linked with the solitary components utilized in preceding studies such as water solubility,stability,and biocompatibility.Furthermore,they exhibit a distinctive accumulation in the liver.From an immunological standpoint,CANPs have been observed to significantly impede the accumulation and activation of various immune cells such as macrophages,neutrophils,and Kupffer cells.This results in the restoration of the hepatic immune cell distribution to a state akin to that of a normal liver.Furthermore,CANPs markedly inhibit the accumulation of a multitude of pro-inflammatory cytokines.Cellularly,it has been observed that CANPs significantly hinder the onset of ferroptosis in hepatocytes.This is accomplished by inhibiting the accumulation of crucial enzymes such as long-chain-fatty-acid-CoA ligase 4(ACSL4),as well as associated lipid oxidation intermediates like malondialdehyde(MDA),which are relevant to the process of ferroptosis.Consequently,a solitary intravenous administration of CANPs has the potential to simultaneously inhibit ferroptosis of hepatocytes and normalize proinflammatory immune cells,one stone for two birds.In conclusion,CANPs may serve as a promising multi-bioactive nanotherapeutic agent and a bioresponsive targeting delivery nanocarrier,offering a potentially effective treatment strategy for hepatic IRI.展开更多
Heteroatom doping has emerged as an effective strategy to enhance the performance of electrocatalysts for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).Traditional doping methods often involve har...Heteroatom doping has emerged as an effective strategy to enhance the performance of electrocatalysts for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).Traditional doping methods often involve harsh chemical treatments and tedious procedures,hindering their widespread applications.Furthermore,although dynamic surface reconstruction in alkaline media is commonly observed in bimetallic compounds,strategies to regulatethis reconstruction behavior for enhanced HER and OER performances remain inadequately explored.Herein,we report an ultrafast(≤300 s)and mild electrochemical doping approach to fabricate Se-doped NiCo_(2)S_(4) hollow nanoarrays on carbon fiber papers(a-NiCo_(2)(S_(1-x)Se_(x))_(4)),investigating the role of Se in enhancing overall water splitting performance.Under HER conditions,a-NiCo_(2)(S_(1-x)Se_(x))_(4) demonstrates remarkable stability,with Se tuning the electronic structure to optimize intermediate adsorption and facilitate H_(2)O dissociation.While under OER conditions,Se doping lowers the energy barrier for reconstruction and promotes transformation into active Se,S co-doped Ni_(0.33)Co_(0.67)OOH nanosheets.The optimal samples exhibit superior HER and OER activity,requiring a cell voltage of 1.578 V to deliver a current density of 100 mA·cm^(-2) for overall water spltting.This work not only introduces a facile method for Se doping but also provides comprehensive insights into the structure-composition-activity relationship for Se-doped bimetallic sulfide.展开更多
Photovoltaic/thermoelectric(PV/TE)coupling systems simultaneously cool solar cells and recover waste heat.Single-wall carbon nanotubes(SWCNTs)films are expected to simultaneously exhibit their electrical conductivity,...Photovoltaic/thermoelectric(PV/TE)coupling systems simultaneously cool solar cells and recover waste heat.Single-wall carbon nanotubes(SWCNTs)films are expected to simultaneously exhibit their electrical conductivity,thermal conductivity,and thermoelectric properties in this application.Fabricating SWCNTs films with polymer-dispersed SWCNTs are simple,safe,and scalable.However,the difficulty in simultaneously enhancing both dispersion quality and SWCNT concentration significantly limit the electrical conductivity of these films.Herein,we develop a SWCNT redispersion method in Nafion ethanol system to achieve well-dispersion at high SWCNT concentrations.Using this dispersion,A4-sized films were readily prepared,achieving remarkable electrical conductivity of 1.97 MS/m.The large-area film exhibits a high power factor(654.37μW/(m·K^(2)))and apparent thermal conductivity(529 W/(m·K)),and is integrated into a 330 cm^(2)thermoelectric/photovoltaic coupling system.The PV output power increases by 220 mW.An additional 70 mV thermoelectric voltage is generated.Moreover,the investigation of the drying process unravels how polymer,solvent and SWCNT concentration collectively dominate the film uniformity.This work significantly enhances the electrical conductivity of polymer-dispersed SWCNTs and explores an application direction that simultaneously utilizes their high thermoelectric performance and thermal conductivity,highlighting their great application potential in PV/TE systems.展开更多
Carbon dots(CDs)are a type of fluorescent nanomaterial that have gained significant attention due to their simple synthesis method and excellent optical properties.The unique structure of CDs also allows for effective...Carbon dots(CDs)are a type of fluorescent nanomaterial that have gained significant attention due to their simple synthesis method and excellent optical properties.The unique structure of CDs also allows for effective luminescence tunability.CDs have been reported to be pH-sensitive in many studies.However,most of these reports are based on the variation of the luminescence intensity of CDs with pH change.There are few reports on exploring the linearly tunable variation of the luminescence wavelength with pH value.Hence,we synthesized novel pH-sensitive CDs using a simple solvothermal method.The synthesized CDs can change their luminescence emission wavelength by simply adjusting the pH of the solution.The change in emission wavelength may be due to the alteration in the surface state of the CDs caused by the pH change.This luminous color change of the CDs allows for visual detection of the pH of the solution.In addition,a color-changing hydrogel composite for pH sensing was designed based on the pH sensitivity of the CDs.The CDs@hydrogel has conductive properties that enable it to be used for motion sensing and sweat pH detection.展开更多
The degradation of vanadium-based alloys during hydrogen sorption cycles is closely linked to defect accumulation(e.g.,dislocation and lattice strain),yet the atomic-scale origins of such defects remain poorly underst...The degradation of vanadium-based alloys during hydrogen sorption cycles is closely linked to defect accumulation(e.g.,dislocation and lattice strain),yet the atomic-scale origins of such defects remain poorly understood.In present study,we reveal the crucial role of initial lattice distortion,quantified by the atomic size difference(δ),in the defect formation and accumulation of V-based alloys.Alloys with higherδvalues exhibit accelerated attenuation of reversible hydrogen capacity(13.22%forδ=4.32%vs.5.60%forδ=3.85%over 100 cycles),accompanied by increased plateau slope factors(Sf)and defect concentrations.High-resolution microscopy uncovers a two-stage defect evolution,associated with the generation of two types of nano-scale hierarchical structures.During the first cycle,nanograins with different spatial orientations show up,which geometrically leads to the formation of dislocations between the misoriented interfaces.In subsequent cycles,alternating nano-layered structures(1-2 nm thickness)gradually appear within the nanograins,resulting in the formation of subgrain boundaries accompanied with the local distortion and strains.These hierarchical nanostructures,driven byδ-dependent lattice distortion,are identified as the primary cause of the defects in alloys.This work provides a microstructure-guided strategy for designing durable hydrogen storage alloys by minimizing atomic size mismatch.展开更多
Heterostructured magnetic composites with exchange coupling effects are considered to be promising electromagnetic wave(EMW)absorbers.In this work,tailored heterostructures of soft magnetic ZnFe_(2)O_(4)and hard magne...Heterostructured magnetic composites with exchange coupling effects are considered to be promising electromagnetic wave(EMW)absorbers.In this work,tailored heterostructures of soft magnetic ZnFe_(2)O_(4)and hard magnetic Fe_(3)C are generated and tightly anchored on two-dimensional(2D)carbon nanosheets,by in-situ blowing and carbonization process of gel precursor.Nanosized soft/hard magnetic phases generate large number of heterogeneous interfaces.Density functional theory(DFT)calculations confirm the exchange coupling effect that results from the dynamic charges reconstruction of soft/hard magnetic heterogeneous interface.The synthesized Fe_(3)C/ZnFe_(2)O_(4)/C(FZC)shows wide effective absorption bandwidth(EAB)of 4.56 GHz and RL_(min)value of−65.6 dB.By layer-to-layer stacking of 2D FZC and reduced graphene oxide(rGO),the obtained flexible rGO/FZC-1 film can effectively shield 5G signals.Importantly,both the 2D morphology and abundant heterostructures restrain the diffusion of saline ions inside the FZC coatings and enhance the“maze effect”,finally improving the corrosion resistance in marine environment.This work provides advanced nanostructure integrating 2D morphology and soft/hard magnetic heterostructure with effective exchange coupling,which can simultaneously achieve the EMW stealth and high corrosion resistance.展开更多
Large-scale synthesis of high-quality two dimensional(2D)semiconductors,such as molybdenum disulfide(MoS_(2)),is a prerequisite for their lab-to-fab transition.It is crucial to systematically explore and understand th...Large-scale synthesis of high-quality two dimensional(2D)semiconductors,such as molybdenum disulfide(MoS_(2)),is a prerequisite for their lab-to-fab transition.It is crucial to systematically explore and understand the influence of key synthetic conditions on the nucleation,uniformity,and quality of MoS_(2) wafers.Here,we report the epitaxial growth of high-quality and uniform monolayer MoS_(2) films on 2-in c-plane sapphire by chemical vapor deposition(CVD)method under optimized growth conditions(0–1 mg NaCl,adequate S/Mo ratio,and the addition of 0–1 sccm O2).We systematically explore the influence of critical synthetic conditions on the nucleation,and stitching of MoS_(2) domains over the wafer scale,including the dosage of the alkali metal salt NaCl additive,the evaporation temperature of MoO_(3),the distance between MoO_(3) and the substrate,and the flow rate of O_(2).Among them,the dosage of NaCl and the S/Mo ratio have important influences on the quality and film coverage of MoS_(2),while the flow rate of O_(2) plays a key role in controlling the nucleation density and domain size.We further discovered that a-plane sapphire could easily guide the unidirectional growth of MoS_(2) without the need for other specific synthetic conditions compared with c-plane and m-plane sapphire.The field-effect transistors(FETs)fabricated from the full-coverage films show an average and the highest mobilities of 28.5 and around 45 cm^(2)·V−1·s^(-1),respectively.展开更多
文摘It is our great pleasure to announce the awardees of 2024 Nano Research Young Innovators(NR45)in nanomaterial self-assembly.Nano Research initiated the NR45 program in 2018 to recognize outstanding young researchers under 45 years of age across diverse fields of nanoscience and nanotechnology.This initiative celebrates their exceptional achievements and potential to advance their respective disciplines through groundbreaking contributions.Awardees are selected via a rigorous competitive process by an award committee comprising members of the journal’s editorial board.The 2024 NR45 Awards focus on nanomaterial self-assembly,honoring 24 innovators for their transformative contributions to this dynamic field.This special issue features 12 review articles and 12 research papers from these distinguished awardees.
文摘Erratum to:Nano Research,2023,16(5):7075-7084,https://doi.org/10.1007/s12274-022-5264-8.The article Research on GGT-responsive drug carrier with active transport effect,written by Han Yan et al.,was erroneously originally published electronically on the publisher’s internet portal(currently SpringerLink)on 3 January 2023 with Fig.8.
基金supported by the school of Textile Science and Engineering,the State Key Laboratory of New Textile Materials and Advanced Processing Technology,Wuhan Textile University。
文摘Advanced aerogel fibers possess numerousadvantages amalgamating the attributes of aerogels and fibermaterials, rendering them invaluable in the realm of thermalmanagement and regulation. However, the achievement ofrobust mechanical properties and increased temperaturestability is still a major challenge for the majority of aerogelfibers. Herein, SiO_(2)-Kevlar hybrid aerogel fibers with bioniccore-shell structure were prepared by reaction spinning andweaved into fabric. Kevlar nanowires dispersion is pumpedinto a bath comprising a self-synthesized silica sol, whichfacilitates the hybridization of biphasic aerogels through thegel reaction. Precise control over the diameter (200-800 μm)and structure of the wet gel fibers was achieved throughmeticulous adjustment of the spinning solution composition and spinning parameters. Subsequent freeze-drying processfacilitates the formation of a core-shell hybrid structure, in which the SiO_(2) aerogel layer effectively encapsulate the Kevlaraerogel core fiber. Taking full advantage of the mechanical properties of the Kevlar core fiber, the resulting SiO_(2)-Kevlaraerogel fibers exhibit commendable weaving characteristics (51.8 MPa). Furthermore, SiO_(2)-Kevlar aerogel fabrics exhibitenhanced thermal insulation characteristics with a thermal conductivity of 0.037 W/(m·K). As a result of the presence ofexternal SiO_(2) aerogel layer, the overall temperature resistance performance of the SiO_(2)-Kevlar fabric reach up to 700 ℃.
基金supported by the National Natural Science Foundation of China(Nos.12034002,22279044,and 22202080)the Jilin Province Science and Technology Development Program(No.20210301009GX)+5 种基金Research Grant Council of Hong Kong(No.15304023)National Natural Science Foundation of China/Research Grant Council of Hong Kong Joint Research Scheme(No.N_PolyU502/21)National Natural Science Foundation of China/Research Grants Council of Hong Kong Collaborative Research Scheme(No.CRS_PolyU504/22)the funding for Projects of Strategic Importance of The Hong Kong Polytechnic University(Project Code:1-ZE2V)Shenzhen Fundamental Research Scheme-General Program(No.JCYJ20220531090807017)Natural Science Foundation of Guangdong Province(No.2023A1515012219).
文摘The development of high-performance atomiccatalysts for the carbon dioxide reduction reaction(CO_(2)RR)is atime-consuming process due to the complexity of the reactionmechanism and the uncertainty of the active site.Herein,wehave proposed combining density functional theory(DFT)andmachine learning(ML)to investigate the potential of topologicalgraphene-based dual-atom catalysts(DACs)as CO_(2)RRelectrocatalysts.By analyzing the ML results,we identify thenumber of d-orbital electrons in the active site as a key factorinfluencing the CO_(2)RR catalytic activity.Additionally,wepropose a simple descriptor to measure the CO_(2)RR activity ofthese DACs.Our findings provide plausible explanations for thesynergistic interactions between bimetallic atoms in CO_(2)RR andallow us to screen the homogeneous Ni-Ni pair as the mostpromising dual-atom catalysts.This work offers a fast MLapproach based on limited DFT calculations to predict the mostelectroactive and stable DACs on carbon support for CO_(2)RR,facilitating rapid screening of high-performance dual-atomcatalysts.
基金supported by the grants from the Natural Science Foundation Committee of Shandong Province(No.ZR2021QB143)Doctoral Fund of Heze University(No.XY20BS20),China.
文摘The constituents and geometric design of cathodic electrocatalyst to achieve high activity and durability are effective but challenging for the development of high-performance Li-O_(2)batteries.This study employs a mild solution precipitation method followed by thermolysis to construct a faveolate open-structured Ru-N/C matrix with a loosely braided network morphology as a bifunctional cathode.The details prove that this hybrid structure is composed of ultrafine Ru globular nanoparticles(ca.2 nm)coated with an N-enriched carbon film and exhibits a valuable beehive through-hole character for rapid mass transport during oxygen redox catalysis.The synergistic effect of open-structured and reticular network matrix with metal-N4 coordination induces asymmetric charge distributions with moderate adsorption/desorption behaviour with oxygen intermediates.Consequently,this particular Ru-N/C matrix cathode provides a promising Li_(2)O_(2)accommodation space and exhibits superior electrochemical performance in terms of a positive discharge plateau and low charge overpotential.Besides,the assembled batteries also present a high discharge capacity and a long cycle life(exceeding 283 cycles).The density functional theory(DFT)calculations also corroborate the assertion that the Ru-N/C catalyst exhibits robust electronic coupling transfer and superior bifunctional activity.As such,our work demonstrates that this type of open-structured Ru-N/C matrix is promising for fabricating high-performance quasi solid-state Li-O_(2)batteries.
文摘Photothermal CO_(2) hydrogenation is a promising route to produce methanol as a sustainable liquid solar fuel.However,most existing catalysts require a combination of solar irradiation and additional heat input to achieve a satisfactory reaction rate.For the few that can be driven solely by light,their reaction rates are one order of magnitude lower.We develop a photothermal catalyst with multilevel interfaces that achieves improvedmethanol production from photothermal CO_(2) hydrogenation without external heat.The catalyst features a layered structure comprising Cu/ZnO/Al_(2)O_(3)(CZA)covered by oxidized carbon black(oCB),where the oCB/CZA interface promotes efficient heat generation and transfer,and the Cu/oxide interface contributes to high catalytic activity.Under a mild pressure of 8 bar,our oCB/CZA catalyst shows a methanol selectivity of 64.7%with a superior production rate of 4.91 mmol-geza-1-h-1,at least one order of magnitude higher than other photothermal catalysts solely driven by light.This work demonstrates a photothermal catalyst design strategy for liquid solar fuel production.
基金supported by the National Natural Science Foundation of China(Nos.52370025 and 22176012)BUCEA Post Graduate Innovation Project(No.PG2024086).
文摘Resource recovery for the preparation of high-value-added products represents a promising strategy for reducing pollution and carbon emissions.In this study,stainless steel pickling wastewater was utilized as a metal source to synthesize MIL-100(Fe),which was subsequently transformed into quasi-MIL-100(Fe)(Q350-MIL-100(Fe))through controlled pyrolysis at an optimized temperature of 350°C.The as-prepared Q350-MIL-100(Fe)demonstrated exceptional performance in activating peroxymonosulfate(PMS)under ultraviolet(UV)light irradiation,enabling the efficient degradation of various organic pollutants.Compared to pristine MIL-100(Fe),Q350-MIL-100(Fe)exhibited a 41.56-fold increase in the degradation rate constant for atrazine(ATZ),attributed to its narrower bandgap,abundant exposed active sites,and hierarchical porous structure.Furthermore,a self-constructed reactor employing Q350-MIL-100(Fe)/graphite felt(GF)as an immobilized catalyst achieved continuous and complete(100.0%)ATZ degradation for up to 96.0 hours.This work provides valuable insights into the sustainable utilization of industrial wastewater to produce high-value-added functional materials for environmental remediation,aligning with the dual goals of pollution control and resource recovery.
基金financially supported by the National Natural Science Foundation of China(Nos.U180413,11904084,and U2004212)Center for Outstanding Overseas Scientists(No.GZS2023007).
文摘Molecular catalysts with well-defined single atom sites and coordination environments exhibit significant potential as oxygen reduction electrocatalysts,but suffering from the activity and stability issues.Herein,the ultrathin carbon shell supported FePc molecule electrocatalysts(FePc/TA-ONG-N),featuring with a direct oxygen bridging between FePc and carbon substrate,were designed and synthesized.The direct connection with oxygen atom on carbon substrate,certified by the Fourier transform infrared spectroscopy(FTIR)and extended X-ray absorption fine structure(EXAFS),can remarkably enhance the interaction and facilitate electron transfer from Fe,leading to an improved activity by reducing adsorption strength of intermediate species through lowering the d-band center position.The resultant half-wave potential of 0.902 V together with a Tafel slope of 23.64 mV·dec^(−1)is superior to Pt/C and control samples.Such catalyst holds a promise as air-cathode electrocatalyst in Zn-air battery with excellent operation stability exceeding 80 h.The density functional theory(DFT)calculations and molecular dynamic simulations unveiled that the O-bridge can effectively stabilize the FePc molecule and function as electron buffer to donate/gain electrons to/from Fe atom during the adsorption of oxygenates.The current findings are insightful for developing molecular catalysts with high performance through substrate engineering and axial coordination.
基金supported by the National Key Research and Development Program of China(No.2021YFA0715502)the National Natural Science Foundation of China(No.62475084)+2 种基金the Scientific Research Project of Wenzhou(No.G2023025)the Innovation Project of Optics Valley Laboratory(No.OVL2023ZD002)the Fund from Science,Technology and Innovation Commission of Shenzhen Municipality(No.GJHZ20220913143403007).
文摘The bulky footprint of near-infrared(NIR)spectrometers has been limiting their applications in portable and movable systems for probing molecular compositions and structures.Quantum dot(QD)computational spectrometers are a promising strategy for miniaturized NIR spectrometers,whose performance is limited by the poor spectral encoding matrix and,ultimately,the poor quality of PbS QDs.Here,we show that the monodispersity and finely controlled absorption peak of PbS QDs are critical parameters affecting the spectral resolution and noise resistance.Thus,a facile synthesis of a series of monodisperse PbS QDs from a single batch is developed using cation exchange synthesis in a seeded-growth manner.All the as-synthesized PbS QDs have narrow size distributions of below 4%,and the peak intervals can be controlled to within 3 nm.Furthermore,stable PbS QD inks are prepared by considering the compatibility between QD ligands,solvents,and polymers.The PbS QD filter array is fabricated using a contact printing method,exhibiting supreme transmittance curves and a spectral encoding matrix.The filter array is coupled with an InGaAs image sensor to form the QD NIR computational spectrometer.Thanks to the high-quality PbS QDs,the QD spectrometer shows a high spectral resolution of 1.5 nm in a broad wavelength range of 900−1700 nm and excellent spectral reconstruction of narrow and broad spectra with fidelities of above 0.987.Additionally,the QD spectrometer is applied to distinguish materials and accurately measure the alcohol content of white wines,demonstrating the great potential for practical applications of QD NIR spectrometers.
基金supported by the National Natural Science Foundation of China(No.52173036).
文摘With the advancement of modern communication technology and military detection technology,there is an urgent need to develop lightweight,flexible,multifunctional composites that integrate efficient infrared(IR)stealth,electromagnetic interference(EMI)shielding,and Joule thermal properties.Nevertheless,the preparation of multifunctional composites with the above properties remains challenging.Herein,multifunctional aerogel films were designed through potassium ionic cross-linking of MXene and aramid nanofiber(ANF),forming an enhanced interpenetrating double-network ANF/MXene-K^(+)(AMK)aerogel.The aerogel film possesses extremely low infrared emissivity(~0.097),reducing radiation temperature by more than 89.7%with 9.2 MPa tensile strength.Furthermore,the film exhibits excellent Joule heating performance,including low driving voltage(1.0 V),fast thermal response(<12.0 s),and long-term stability.Concurrently,the interpenetrating double-network structure of potassium ion-induced self-assembly of MXene nanosheets enabled AMK to demonstrate enhanced electromagnetic shielding(72.4 dB).Overall,this work provides a promising solution for fabricating multifunctional materials and demonstrates their potential in adaptive thermal camouflage systems,next-generation wearable thermal management,and EMI shielding of electronic devices.
基金the National Natural Science Foundation of China(Nos.22271257,32202063,and 21902148)Natural Science Foundation of Henan(No.232300421096)+5 种基金the National Key R&D Program of China(No.2024YFE0105200)Start-up Research Fundation of Henan University of Technology(No.2021BS053)the Innovation and Technology Commission of Hong Kong,The Hong Kong Polytechnic Universitythe support from MICIU/AEI/10.13039/501100011033ERDF/EU(No.PID2022-138724NB-I00)the Xunta de Galicia/ERDF(No.GRC ED431C 2020/09).
文摘Recent studies support that magnetic chiral nanozymes,integrating the features of chirality,magnetism,and enzyme-like catalysis,provide new insights into the synthetic methodologies and applications of chiral nanozymes.In this study,we present the design of novel magnetic chiral cobalt superstructures(CoSSs)synthesized by the regulation of complex formation kinetics of Co3+with chiral ligands(L-or D-tartaric acid)under varying metal-to-ligand molar ratios and solvent polarity.This approach yielded a series of CoSSs with varying symmetry from high to low.The chiral CoSSs exhibited chirality-dependent peroxidase(POD)-like activity,demonstrating a high affinity of L-CoSSs towards substrates,with a chiral selective factor of approximately 1.37.In addition,the magneto-optical effects of the chiral CoSSs significantly enhanced their chiroptical performance from ultraviolet-visible(UV-vis)to near-infrared region.Under a magnetic field,the affinity of chiral CoSSs for substrates increases,while the chiral selective factor was modified to 0.76.This research on magnetic chiral CoSSs nanozymes opens promising new avenues for the application of artificial enzymes in fields,such as antibacterial technology,drug delivery,and biocatalysis.
基金supported by the Key R&D Program of Hubei Province(No.2024BCB091)the Natural Science Foundation of Hubei Province(No.2022CFA031).
文摘Lithium iron phosphate(LFP)offers excellent structural and performance stability derived from the(PO_(4))^(3-)polyanionic structure,which is beneficial for long-term usage.However,this inherent stability also comes along with intrinsically poor ionic and electronic conductivities,which have been notoriously plaguing its high-rate performance and broader applications.Here,we present a gas-assisted transient synthesis(GATS,~30 s)of LFP with controllable oxygen vacancies(O_(v))for enhanced rate performance yet without sacrificing structural integrity or cycling stability.Benefited by the ultrafast heating and a higher synthesis temperature,we revealed that the LFP synthesis in GATS followed an interface reaction mechanism(rapid core shrinking)with a low activation energy(E_(a)),thus reducing the synthesis time from~16.5 h in tube furnace heating(TFH,often nuclei-growth mechanism)to merely seconds.The optimized LFP sample demonstrates an 8-fold enhancement in ionic conductivity and a 12-fold increase in electronic conductivity compared to LFP obtained by TFH and attains exceptional cycling stability even at high rates of 10 C,as evidenced by a higher capacity retention of 93.8%(vs.63.6%of commercial LFP)after 1000 cycles.Our strategy offers a kinetic pathway for rapid synthesis and structural engineering of LFP,thus unlocking its potential for broader energy storage applications.
基金funded by the Beijing Municipal Natural Science Foundation(No.L223009)the National Natural Science Foundation of China(Nos.22075029,22209014,and 22479012)+2 种基金the National Key Research and Development Program of China(No.2021YFB2500300)the Key Research and Development(R&D)Projects of Shanxi Province(No.2021020660301013)the Fundamental Research Funds for the Central Universities(No.2023CX01031).
文摘Poly(1,3-dioxolane)(PDOL)-based solid electrolytes hold great potential for solid-state lithium(Li)metal batteries due to their superior ionic conductivity at room temperature.However,traditional PDOL electrolytes suffer from inferior thermal stability,which has hampered their practical application.In this work,a competitive coordination mechanism is proposed to strengthen vulnerable ether oxygen bonds in PDOL chains,thereby improving the thermal stability of PDOL electrolytes.The strong coordination of Lewis base ligands on Li_(6.75)La_(3)Zr_(1.75)Ta_(0.25)O_(12)(LLZTO)surface with Li ions weakens the ionic-dipolar interactions between PDOL chains and Li ions,conversely reinforcing the bond energy of ether oxygen bonds.Incorporating LLZTO into PDOL electrolytes effectively enhances the thermal decomposition temperature from 110 to 302℃.Li||LiFePO_(4)full cell with a 12μm ultrathin PDOL hybrid electrolyte delivers enhanced discharge capacity and extended cycling life for 100 cycles at an elevated temperature of 60℃.This work provides critical insights into the development of thermally stable PDOL electrolytes for safe solid-state Li metal batteries.
基金This research gained support from the National Key Research and Development Program of China(No.2021YFA1100500)the Major Research Plan of the National Natural Science Foundation of China(No.92159202)+3 种基金the National Natural Science Foundation of China(Nos.32171368 and 81930016)State Key Laboratory for Diagnosis and Treatment of Infectious Diseases(No.zz202310)the Non profit Central Research Institute Fund of Chinese Academy of Medical Sciences(No.2023-PT320-02)the International Science and Technology Cooperation Project of Zhejiang province.
文摘Hepatic ischemia-reperfusion injury(IRI)is an intricate and inevitable physiological event occurred in the liver transplantation(LT)and it is of paramount importance to devise novel and efficient methods to ameliorate IRl.Herein,we report a"one stone for two birds"strategy for IRI therapy.In this study,we engineered carvacrol-artesunate(CAR-ART)nanoparticles(CANPs)utilizing CAR and ART as precursor monomers and simulated IRl in an in vivo mouse model.Our research results indicate that CANPs proficiently surmount the constraints linked with the solitary components utilized in preceding studies such as water solubility,stability,and biocompatibility.Furthermore,they exhibit a distinctive accumulation in the liver.From an immunological standpoint,CANPs have been observed to significantly impede the accumulation and activation of various immune cells such as macrophages,neutrophils,and Kupffer cells.This results in the restoration of the hepatic immune cell distribution to a state akin to that of a normal liver.Furthermore,CANPs markedly inhibit the accumulation of a multitude of pro-inflammatory cytokines.Cellularly,it has been observed that CANPs significantly hinder the onset of ferroptosis in hepatocytes.This is accomplished by inhibiting the accumulation of crucial enzymes such as long-chain-fatty-acid-CoA ligase 4(ACSL4),as well as associated lipid oxidation intermediates like malondialdehyde(MDA),which are relevant to the process of ferroptosis.Consequently,a solitary intravenous administration of CANPs has the potential to simultaneously inhibit ferroptosis of hepatocytes and normalize proinflammatory immune cells,one stone for two birds.In conclusion,CANPs may serve as a promising multi-bioactive nanotherapeutic agent and a bioresponsive targeting delivery nanocarrier,offering a potentially effective treatment strategy for hepatic IRI.
基金This work was financially supported by the National Natural Science Foundation of China(Nos.22272008 and 21872011)the Project of PetroChina Technology Management Department(No.2023ZZ1202).
文摘Heteroatom doping has emerged as an effective strategy to enhance the performance of electrocatalysts for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).Traditional doping methods often involve harsh chemical treatments and tedious procedures,hindering their widespread applications.Furthermore,although dynamic surface reconstruction in alkaline media is commonly observed in bimetallic compounds,strategies to regulatethis reconstruction behavior for enhanced HER and OER performances remain inadequately explored.Herein,we report an ultrafast(≤300 s)and mild electrochemical doping approach to fabricate Se-doped NiCo_(2)S_(4) hollow nanoarrays on carbon fiber papers(a-NiCo_(2)(S_(1-x)Se_(x))_(4)),investigating the role of Se in enhancing overall water splitting performance.Under HER conditions,a-NiCo_(2)(S_(1-x)Se_(x))_(4) demonstrates remarkable stability,with Se tuning the electronic structure to optimize intermediate adsorption and facilitate H_(2)O dissociation.While under OER conditions,Se doping lowers the energy barrier for reconstruction and promotes transformation into active Se,S co-doped Ni_(0.33)Co_(0.67)OOH nanosheets.The optimal samples exhibit superior HER and OER activity,requiring a cell voltage of 1.578 V to deliver a current density of 100 mA·cm^(-2) for overall water spltting.This work not only introduces a facile method for Se doping but also provides comprehensive insights into the structure-composition-activity relationship for Se-doped bimetallic sulfide.
基金supported by the National Natural Science Foundation of China(Nos.52402048 and 62274054)the“333 project”of Hebei Province(No.C20221014)+6 种基金Hebei Provincial Innovation Capability Enhancement Program Project(No.24464302D)Hebei University President’s Research Fund(No.XZJJ202201)Natural Science Foundation of Hebei Province(Nos.F2023201001 and F2023201005)Interdisciplinary research project of Hebei University(No.DXK202303)the Central Guidance on Local Science and Technology Development Fund Project of Hebei Province(Nos.236Z4307G and 226Z4306G)Hebei province Science Foundation for Distinguished Young Scholars(No.F2021201035)S&T Program of Hebei(No.242Q4501Z).
文摘Photovoltaic/thermoelectric(PV/TE)coupling systems simultaneously cool solar cells and recover waste heat.Single-wall carbon nanotubes(SWCNTs)films are expected to simultaneously exhibit their electrical conductivity,thermal conductivity,and thermoelectric properties in this application.Fabricating SWCNTs films with polymer-dispersed SWCNTs are simple,safe,and scalable.However,the difficulty in simultaneously enhancing both dispersion quality and SWCNT concentration significantly limit the electrical conductivity of these films.Herein,we develop a SWCNT redispersion method in Nafion ethanol system to achieve well-dispersion at high SWCNT concentrations.Using this dispersion,A4-sized films were readily prepared,achieving remarkable electrical conductivity of 1.97 MS/m.The large-area film exhibits a high power factor(654.37μW/(m·K^(2)))and apparent thermal conductivity(529 W/(m·K)),and is integrated into a 330 cm^(2)thermoelectric/photovoltaic coupling system.The PV output power increases by 220 mW.An additional 70 mV thermoelectric voltage is generated.Moreover,the investigation of the drying process unravels how polymer,solvent and SWCNT concentration collectively dominate the film uniformity.This work significantly enhances the electrical conductivity of polymer-dispersed SWCNTs and explores an application direction that simultaneously utilizes their high thermoelectric performance and thermal conductivity,highlighting their great application potential in PV/TE systems.
基金This work was supported by the National Natural Science Foundation of China(No.21774098).
文摘Carbon dots(CDs)are a type of fluorescent nanomaterial that have gained significant attention due to their simple synthesis method and excellent optical properties.The unique structure of CDs also allows for effective luminescence tunability.CDs have been reported to be pH-sensitive in many studies.However,most of these reports are based on the variation of the luminescence intensity of CDs with pH change.There are few reports on exploring the linearly tunable variation of the luminescence wavelength with pH value.Hence,we synthesized novel pH-sensitive CDs using a simple solvothermal method.The synthesized CDs can change their luminescence emission wavelength by simply adjusting the pH of the solution.The change in emission wavelength may be due to the alteration in the surface state of the CDs caused by the pH change.This luminous color change of the CDs allows for visual detection of the pH of the solution.In addition,a color-changing hydrogel composite for pH sensing was designed based on the pH sensitivity of the CDs.The CDs@hydrogel has conductive properties that enable it to be used for motion sensing and sweat pH detection.
基金granted by the National Key R&D Program of China(No.2022YFB3803700)Sichuan Science and Technology Program(No.PG-PGFG-JFKF23-000009-0).
文摘The degradation of vanadium-based alloys during hydrogen sorption cycles is closely linked to defect accumulation(e.g.,dislocation and lattice strain),yet the atomic-scale origins of such defects remain poorly understood.In present study,we reveal the crucial role of initial lattice distortion,quantified by the atomic size difference(δ),in the defect formation and accumulation of V-based alloys.Alloys with higherδvalues exhibit accelerated attenuation of reversible hydrogen capacity(13.22%forδ=4.32%vs.5.60%forδ=3.85%over 100 cycles),accompanied by increased plateau slope factors(Sf)and defect concentrations.High-resolution microscopy uncovers a two-stage defect evolution,associated with the generation of two types of nano-scale hierarchical structures.During the first cycle,nanograins with different spatial orientations show up,which geometrically leads to the formation of dislocations between the misoriented interfaces.In subsequent cycles,alternating nano-layered structures(1-2 nm thickness)gradually appear within the nanograins,resulting in the formation of subgrain boundaries accompanied with the local distortion and strains.These hierarchical nanostructures,driven byδ-dependent lattice distortion,are identified as the primary cause of the defects in alloys.This work provides a microstructure-guided strategy for designing durable hydrogen storage alloys by minimizing atomic size mismatch.
基金supports from the National Natural Science Foundation of China(No.52202371)the Natural Science Foundation of Shandong Province(Nos.ZR2023ME010 and ZR2024ME168)+1 种基金Youth Innovation Team Program in Colleges of Shandong Province(No.2023KJ151)SDUT&Zibo City Integration Development Project(No.2021SNPT0045).
文摘Heterostructured magnetic composites with exchange coupling effects are considered to be promising electromagnetic wave(EMW)absorbers.In this work,tailored heterostructures of soft magnetic ZnFe_(2)O_(4)and hard magnetic Fe_(3)C are generated and tightly anchored on two-dimensional(2D)carbon nanosheets,by in-situ blowing and carbonization process of gel precursor.Nanosized soft/hard magnetic phases generate large number of heterogeneous interfaces.Density functional theory(DFT)calculations confirm the exchange coupling effect that results from the dynamic charges reconstruction of soft/hard magnetic heterogeneous interface.The synthesized Fe_(3)C/ZnFe_(2)O_(4)/C(FZC)shows wide effective absorption bandwidth(EAB)of 4.56 GHz and RL_(min)value of−65.6 dB.By layer-to-layer stacking of 2D FZC and reduced graphene oxide(rGO),the obtained flexible rGO/FZC-1 film can effectively shield 5G signals.Importantly,both the 2D morphology and abundant heterostructures restrain the diffusion of saline ions inside the FZC coatings and enhance the“maze effect”,finally improving the corrosion resistance in marine environment.This work provides advanced nanostructure integrating 2D morphology and soft/hard magnetic heterostructure with effective exchange coupling,which can simultaneously achieve the EMW stealth and high corrosion resistance.
基金This work was granted by the National Key Research and Development Program of the of China(No.2022YFA1203801)the National Natural Science Foundation of China(Nos.51991340,51991343,52221001,52102168,and 52372145)+4 种基金Hunan Key Research and Development Program Project(No.2022GK2005)the Natural Science Foundation of Hunan Province(No.2023JJ20009)the Hunan Province“Huxiang Talents”Project(No.2023RC3092)the Natural Science Foundation of Chongqing,China(No.cstc2021jcyj-msxmX0321)the Doctoral Scientific Research Foundation of Hubei University of Automotive Technology(No.BK202486).
文摘Large-scale synthesis of high-quality two dimensional(2D)semiconductors,such as molybdenum disulfide(MoS_(2)),is a prerequisite for their lab-to-fab transition.It is crucial to systematically explore and understand the influence of key synthetic conditions on the nucleation,uniformity,and quality of MoS_(2) wafers.Here,we report the epitaxial growth of high-quality and uniform monolayer MoS_(2) films on 2-in c-plane sapphire by chemical vapor deposition(CVD)method under optimized growth conditions(0–1 mg NaCl,adequate S/Mo ratio,and the addition of 0–1 sccm O2).We systematically explore the influence of critical synthetic conditions on the nucleation,and stitching of MoS_(2) domains over the wafer scale,including the dosage of the alkali metal salt NaCl additive,the evaporation temperature of MoO_(3),the distance between MoO_(3) and the substrate,and the flow rate of O_(2).Among them,the dosage of NaCl and the S/Mo ratio have important influences on the quality and film coverage of MoS_(2),while the flow rate of O_(2) plays a key role in controlling the nucleation density and domain size.We further discovered that a-plane sapphire could easily guide the unidirectional growth of MoS_(2) without the need for other specific synthetic conditions compared with c-plane and m-plane sapphire.The field-effect transistors(FETs)fabricated from the full-coverage films show an average and the highest mobilities of 28.5 and around 45 cm^(2)·V−1·s^(-1),respectively.
