Nowadays,higher requirements are put forward to the storage and utilization of energy,and supercapacitor is a kind of energy storage electronic devices.The resulting CA-N,with a specific surface area of 320.6 m^(2)/g ...Nowadays,higher requirements are put forward to the storage and utilization of energy,and supercapacitor is a kind of energy storage electronic devices.The resulting CA-N,with a specific surface area of 320.6 m^(2)/g and a pore volume of 0.28 cm^(3)/g,demonstrated a remarkable supercapacitance of 283.3 F/g.As a mesoporous material,CA-N offers numerous channels for the diffusion and absorption of electrolyte ions.Furthermore,it exhibited an impressive capacity retention rate of 98.48% after 5000 charge-discharge cycles.These outstanding electrochemical properties highlight the potential of CA-N for applications in energy storage.展开更多
Rare earth luminescent materials have attracted extensive attention in the biomedical field as noncontact temperature monitoring devices with microscopic resolution due to their properties in the visible and near-infr...Rare earth luminescent materials have attracted extensive attention in the biomedical field as noncontact temperature monitoring devices with microscopic resolution due to their properties in the visible and near-infrared regions.At the application level,it is required to have a certain temperature monitoring capability in the near-infrared region II window to enhance the tissue penetration depth.Here,two kinds of YOFs:Er^(3+),Yb^(3+)were prepared by co-precipitation and hydrothermal method,and the luminescence was enhanced by ion doping.An Er^(3+)-based ratiometric nanothermometer of ^(4)F_(9∕2)→4 I_(15∕2)(672nm,upconversion luminescence)to ^(4)I _(13∕2)→^(4) I_(15∕2)(1580nm/1566nm,NIR II downshifting luminescence)were designed with the Stark energy level.When doped with 2%Zn^(2+),the relative temperature sensitivity of YOF prepared by co-precipitation method was improved from 0.30%℃^(-1)(30℃)to 0.59%℃^(-1)(30℃),expanding its use as a temperature monitoring device possibility.The temperature sensitivity of YOF prepared by hydrothermal method was 1.01%℃^(-1)(30℃).Finally,the NIR II luminescence of the prepared nanothermometer was used as a control for temperature monitoring of heating sites in mice.The results showed that it can distinguish heating site from control site and no significant cytotoxicity or damage to the tissues was revealed,indicating its broad prospects in the biomedical field and other temperature monitoring scenarios in the future.展开更多
Breath analysis can be used to diagnose diseases non-invasively.Accurate measurement of volatolomics is critical for breath analysis to be a gold standard.Tedlar bags(TB)are often used to collect breath samples,but th...Breath analysis can be used to diagnose diseases non-invasively.Accurate measurement of volatolomics is critical for breath analysis to be a gold standard.Tedlar bags(TB)are often used to collect breath samples,but they emit contaminants that affect accuracy.This issue was overlooked in previous studies.We found contamination issues with TB(e.g.,siloxanes and aromatic impurities)that affect the identification of volatile organic compounds(VOCs)due to impurities.Then,home-designed equipment(HD)made with poly-tetrafluoride(PTFE)and quartz glass for breath collection was developed and employed in clinical trials.15 healthy individuals and 32 non-small cell lung cancer(NSCLC)patients at IA stage participated in this study.610 VOCs can be collected through TB,which is less than HD(1109 VOCs),demonstrating that the inner wall of the TB easily adsorbs VOCs,leading to decreased detection concentrations.Otherwise,utilizing orthogonal partial least squares discriminant analysis(OPLS-DA),we identified chemical markers with significant discriminatory power(VIP>1.5,P<0.05).The HD method identified 12 target VOCs,surpassing the 3 target VOCs discerned by the TB method.A model combined with a machine learning algorithm for distinguishing early-stage lung cancer patients was established based on biomarkers,which were selected based on OPLS-DA.The results showed strong predictive capabilities for the HD-based model.It indicated that 12 biomarkers derived from the HD model were more effective in distinguishing NSCLC patients,with an AUC value of 0.92,compared to the AUC value of 0.5 from 3 markers obtained from the TB model.The sensitivity and specificity in the confusion matrix reached 100%and 80%for the HD test,but TB test reached only 40%and 60%.This work demonstrated that optimizing and standardizing VOCs collection methodology from breath of lung cancer patients is essential to identify actual volatiles,which could promote disease volatolomics worldwide.展开更多
Chemi-resistive sensors based on hybrid functional materials are promising candidates for gas sensing with high responsivity,good selectivity,fast response/recovery,great stability/repeatability,room-working temperatu...Chemi-resistive sensors based on hybrid functional materials are promising candidates for gas sensing with high responsivity,good selectivity,fast response/recovery,great stability/repeatability,room-working temperature,low cost,and easy-to-fabricate,for versatile applications.This progress report reviews the advantages and advances of these sensing structures compared with the single constituent,according to five main sensing forms:manipulating/constructing heterojunctions,catalytic reaction,charge transfer,charge carrier transport,molecular binding/sieving,and their combinations.Promises and challenges of the advances of each form are presented and discussed.Critical thinking and ideas regarding the orientation of the development of hybrid material-based gas sensor in the future are discussed.展开更多
Droplet-based microfluidics enables the generation of uniform microdroplets at picoliter or nanoliter scale with high frequency(∼kHz)under precise control.The droplets can function as bioreactors for versatile chemic...Droplet-based microfluidics enables the generation of uniform microdroplets at picoliter or nanoliter scale with high frequency(∼kHz)under precise control.The droplets can function as bioreactors for versatile chemical/biological study and analysis.Taking advantage of the discrete compartment with a confined volume,(1)isolation and manipulation of a single cell,(2)improvement of in-droplet effective concen-trations,(3)elimination of heterogeneous population effects,(4)diminution of contamination risks can be achieved,making it a powerful tool for rapid,sensitive,and high-throughput detection and analysis of bacteria,even for rare or unculturable strains in conventional methods.This mini-review will focus on the generation and manipulation of micro-droplets and bacteria detection and analysis carried out by droplet-based microfluidics.Finally,applications with high potential of droplet-based bacteria analysis are briefly introduced.Due to the advantages of rapid,sensitive,high throughput,and compatibility with rare and unculturable bacteria in conventional methods,droplet-based microfluidics has tremendous potential of providing novel solutions for biological medicine,microbiological engineering,environmental ecology,etc.展开更多
Fast skin repair is critical for less infection, less pain and high quality of life, which is still limited with undesirable rehabilitation speed and side effects. Currently, laser-activated silk sealant agent without...Fast skin repair is critical for less infection, less pain and high quality of life, which is still limited with undesirable rehabilitation speed and side effects. Currently, laser-activated silk sealant agent without suture and gauze has been demonstrated promising for fast skin repair taking advantage of its structural transformation after heating. Nevertheless, more efficient healing effects and less side effects of laseractivated silk sealant agent remains challenging due to absence of suitable photo-thermal materials and robust/biomimetic protein materials. In this work, the marriage between silk protein and Rehmanniae radix preparata(a kind of the traditional Chinese herb) has been demonstrated as a novel and effective way to achieve an excellent healing effect for skin repair. The non-toxicity, high photothermal conversion efficiency and healing mechanism are systematically studied and proved. This new methodology might shed a new light for combining dark traditional Chinese medicine and silk fibroin for advanced wound healing technology.展开更多
Solid oxide fuel cell(SOFC)is a promising energy conversion device because of its high efficiency and fuel/oxidant flexibility,enabling the direct conversion of chemical energy to electrical power.By using N_(2)O as a...Solid oxide fuel cell(SOFC)is a promising energy conversion device because of its high efficiency and fuel/oxidant flexibility,enabling the direct conversion of chemical energy to electrical power.By using N_(2)O as an oxidant instead of air,we develop a dual-phase catalyst La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ)-Gd_(0.1)Ce_(0.9)O_(2-δ)(LSCF-GDC),which exhibits efficient bifunctionality as a cathode for SOFC,synergistic ally promoting simultaneous N_(2)O decomposition and oxygen reduction kinetics.展开更多
Working temperature,sensitivity,and selectivity are some of the characteristics of the applied gas sensors.How to design and fabricate an ideal gas sensor working at room temperature is still challenging and attractin...Working temperature,sensitivity,and selectivity are some of the characteristics of the applied gas sensors.How to design and fabricate an ideal gas sensor working at room temperature is still challenging and attracting lots of interest.Two-dimensional(2D)materials with ultra-thin structure have been demonstrated as a family of ideal candidates to achieve this goal.Among them,Ti_(3)C_(2)T_(x) MXene,a kind of layered sheet synthesized by selectively etching MAX phases materials,shows remarkable potential to be the sensitive materials solely or in a composite.However,their designing rules are still lacking critical thinking from the viewpoint of the intrinsic property of Ti_(3)C_(2)T_(x) MXene based materials.In this article,two critical features,i.e.,the thickness of the sensitive materials,and the scope of the analytes,are elaborated towards Ti_(3)C_(2)T_(x) MXene based gas sensors after characterizing the performance of sensing reducing gases(NH3 and CO)and oxidizing gas(NO2).First,the thinner the Ti_(3)C_(2)T_(x) MXene sensitive layer,the better the sensitivity.Second,the Ti_(3)C_(2)T_(x) MXene based gas sensor is not suitable for strong and moderate oxidation gas due to its ease of oxidation.These two rules are demonstrated,and could be considered with priority both in the future researches and practical applications.展开更多
Argyrodite-based solid-state lithium metal batteries exhibit significant potential as next-generation energy storage devices.However,their practical applications are constrained by the intrinsic poor stability of argy...Argyrodite-based solid-state lithium metal batteries exhibit significant potential as next-generation energy storage devices.However,their practical applications are constrained by the intrinsic poor stability of argyrodite towards Li metal and exposure to air/moisture.Therefore,an indium-involved modification strategy is employed to address these issues.The optimized doping yields a high Li-ion conductivity of 7.5 mS cm^(-1)for Li_(5.54)In_(0.02)PS_(4.47)O_(0.03)Cl_(1.5)electrolyte,accompanied by enhanced endurance against air/moisture and bare Li metal.It retains 92.0%of its original conductivity after exposure to air at a low dew point of-60℃in dry room.Additionally,a composite layer comprising Li-In alloy and Li F phases is generated on the surface of lithium metal anode via the reaction between InF_(3)and molten Li.This layer effectively mitigates Li dendrite growth by creating a physical barrier from the robust LiF phase,while the Li-In alloy induces uniform Li-ion deposition and accelerates Li transport dynamics across the interphase between the solid electrolyte/Li metal.Moreover,the In-doped electrolyte facilitates the in-situ generation of Li-In alloy within its voids,reducing local current density and further inhibiting lithium dendrite growth.Consequently,the combination of the Li_(5.54)In_(0.02)PS_(4.47)O_(0.03)Cl_(1.5)electrolyte and the InF_(3)@Li anode provides exceptional electrochemical performances in both symmetric cells and solid-state lithium metal batteries across different operating temperatures.Specifically,the LiNbO_(3)@LiNi_(0.7)Co_(0.2)Mn_(0.1)O_(2)/Li_(5.54)In_(0.02)PS_(4.47)O_(0.03)Cl_(1.5)/InF_(3)@Li cell delivers a high discharge capacity of 167.8 mAh g^(-1)at 0.5 C under 25℃and retains 80.0%of its initial value after 400 cycles.This work offers a viable strategy for designing functional interfaces with enhanced stability for sulfide-based solid-state lithium batteries.展开更多
Various diseases increasingly challenge the health status and life quality of human beings.Volatolome emitted from patients has been considered as a potential family of markers,volatolomics,for diagnosis/screening.The...Various diseases increasingly challenge the health status and life quality of human beings.Volatolome emitted from patients has been considered as a potential family of markers,volatolomics,for diagnosis/screening.There are two fundamental issues of volatolomics in healthcare.On one hand,the solid relationship between the volatolome and specific diseases needs to be clarified and verified.On the other hand,effective methods should be explored for the precise detection of volatolome.Several comprehensive review articles had been published in this field.However,a timely and systematical summary and elaboration is still desired.In this review article,the research methodology of volatolomics in healthcare is critically considered and given out,at first.Then,the sets of volatolome according to specific diseases through different body sources and the analytical instruments for their identifications are systematically summarized.Thirdly,the advanced electronic nose and photonic nose technologies for volatile organic compounds(VOCs)detection are well introduced.The existed obstacles and future perspectives are deeply thought and discussed.This article could give a good guidance to researchers in this interdisciplinary field,not only understanding the cutting-edge detection technologies for doctors(medicinal background),but also making reference to clarify the choice of aimed VOCs during the sensor research for chemists,materials scientists,electronics engineers,etc.展开更多
Interface functional groups play an essential role in regulating the electrical properties of bulk materials.In this work,we designed a novel strategy to explore a new way to enhance triboelectric performance by regul...Interface functional groups play an essential role in regulating the electrical properties of bulk materials.In this work,we designed a novel strategy to explore a new way to enhance triboelectric performance by regulating the functional groups between nano-fillers and polymer matrix without obvious changes in the dielectric constant.The silica nanoparticles(SNPs)modified perfluoro-silane coupling agents(PFSCAs)with different chain lengths were added to the polyvinylidene difluoride to regulate the transferred charge density(TCD)of triboelectric nanogenerators(TENGs).When the doping concentration of perfluorodecyl modified SNPs is 2.25 wt.%,the nanocomposite film based TENG exhibits the maximum TCD of 166μC/m^(2)and power density of 3.12 W/m^(2)which are 6 times and 39 times as big as those of pure polyvinylidene difluoride(PVDF)film.The charge accumulation and decay process show that interface functional groups dominate the performance of TENGs.Then,a Fermi level model is proposed and why the TCD could be regulated by the concentration of nanoparticles in bulk materials is explained.This work provides a new concept for understanding the performance of TENG independent dielectric constant and points out a new direction for enhancing TENG’s performance,since wealthy functional groups with selectivity are applicable.展开更多
Stable and flexible metal nanoparticles(NPs)with regeneration ability are critical for long-term operation of solid oxide electrolysis cells(SOECs).Herein,a novel perovskite electrode with stoichiometric Pr_(0.4)Sr_(0...Stable and flexible metal nanoparticles(NPs)with regeneration ability are critical for long-term operation of solid oxide electrolysis cells(SOECs).Herein,a novel perovskite electrode with stoichiometric Pr_(0.4)Sr_(0.6)Co_(0.125)Fe_(0.75)Mo_(0.125)O_(3)−δ(PSFCM)is synthesized and studied,which undergoes multiple redox cycles to validate its structural stability and NPs reversibility.The Co-Fe alloy has exsolved from the parent bulk under reducing atmosphere,and is capable of reincorporation into the parent oxide after re-oxidation treatment.During the redox process,we successfully manipulate the size and population density of the exsolved NPs,and find that the average particle size significantly reduces but the population density increases correspondingly.The electrode polarization resistance of the symmetric cell remains stable for 450 h,and even activates after the redox cycling,which may be attributed to the higher quantity and larger specific surface area of the regenerated Co-Fe alloy NPs.Moreover,the electrochemical performance towards carbon dioxide reduction reaction(CO_(2)RR)is evaluated,and the CO_(2)electrolyzer consisting of CoFe@PSCFM-Ce_(0.8)Sm_(0.2)O_(1.9)(SDC)dual-phase electrode exhibits an excellent current density of 1.42 A·cm^(−2)at 1.6 V,which reaches 1.7 times higher than 0.83 A·cm^(−2)for the pristine PSCFM electrode.Overall,with this flexible and reversible high-performance SOEC cathode material,new options and perspectives are provided for the efficient and durable CO_(2)electrolysis.展开更多
Ternary strategy is one of the most effective methods to further boost the power conversion efficiency(PCE)of organic photovoltaic cells(OPVs).In terms of high-efficiency PM6:Y6 binary systems,there is still room to f...Ternary strategy is one of the most effective methods to further boost the power conversion efficiency(PCE)of organic photovoltaic cells(OPVs).In terms of high-efficiency PM6:Y6 binary systems,there is still room to further reduce energy_(loss)(E_(loss))through regulating molecular packing and aggregation by introducing a third component in the construction of ternary OPVs.Here we introduce a simple molecule BR1 based on an acceptor-donor-acceptor(A-D-A)structure with a wide bandgap and high crystallinity into PM6:Y6-based OPVs.It is proved that BR1 can be selectively dispersed into the donor phase in the PM6:Y6 and reduce disorder in the ternary blends,thus resulting in lower E_(loss,non-rad)and E_(loss).Furthermore,the mechanism study reveals well-develop phase separation morphology and complemented absorption spectra in the ternary blends,leading to higher charge mobility,suppressed recombination,which concurrently contributes to the significantly improved PCE of 17.23%for the ternary system compared with the binary ones(16.21%).This work provides an effective approach to improve the performance of the PM6:Y6-based OPVs by adopting a ternary strategy with a simple molecule as the third component.展开更多
基金supported by Shenzhen Science and Technology Program(No.JCYJ20240813103608012)State Key Laboratory of New Textile Materials andAdvanced Processing Technologies(No.FZ2024019)National Natural Science Foundation of China(No.22104117).
文摘Nowadays,higher requirements are put forward to the storage and utilization of energy,and supercapacitor is a kind of energy storage electronic devices.The resulting CA-N,with a specific surface area of 320.6 m^(2)/g and a pore volume of 0.28 cm^(3)/g,demonstrated a remarkable supercapacitance of 283.3 F/g.As a mesoporous material,CA-N offers numerous channels for the diffusion and absorption of electrolyte ions.Furthermore,it exhibited an impressive capacity retention rate of 98.48% after 5000 charge-discharge cycles.These outstanding electrochemical properties highlight the potential of CA-N for applications in energy storage.
基金supported by the Key Research and Development Program of Shaanxi(Program No.2023-YBSF-479)the National Natural Science Foundation of China(NSFC 22075249)the Fundamental Research Funds for the Central Universities.
文摘Rare earth luminescent materials have attracted extensive attention in the biomedical field as noncontact temperature monitoring devices with microscopic resolution due to their properties in the visible and near-infrared regions.At the application level,it is required to have a certain temperature monitoring capability in the near-infrared region II window to enhance the tissue penetration depth.Here,two kinds of YOFs:Er^(3+),Yb^(3+)were prepared by co-precipitation and hydrothermal method,and the luminescence was enhanced by ion doping.An Er^(3+)-based ratiometric nanothermometer of ^(4)F_(9∕2)→4 I_(15∕2)(672nm,upconversion luminescence)to ^(4)I _(13∕2)→^(4) I_(15∕2)(1580nm/1566nm,NIR II downshifting luminescence)were designed with the Stark energy level.When doped with 2%Zn^(2+),the relative temperature sensitivity of YOF prepared by co-precipitation method was improved from 0.30%℃^(-1)(30℃)to 0.59%℃^(-1)(30℃),expanding its use as a temperature monitoring device possibility.The temperature sensitivity of YOF prepared by hydrothermal method was 1.01%℃^(-1)(30℃).Finally,the NIR II luminescence of the prepared nanothermometer was used as a control for temperature monitoring of heating sites in mice.The results showed that it can distinguish heating site from control site and no significant cytotoxicity or damage to the tissues was revealed,indicating its broad prospects in the biomedical field and other temperature monitoring scenarios in the future.
基金supported by the Key Research and Development Program of Shaanxi(No.2022ZDLSF01-04)National Natural Science Foundation of China(No.22104117)The First Affiliated Hospital of Xi’an Jiaotong University’s Medical"Basic-Clinical"Integration Innovation(No.YXJLRH2022033)。
文摘Breath analysis can be used to diagnose diseases non-invasively.Accurate measurement of volatolomics is critical for breath analysis to be a gold standard.Tedlar bags(TB)are often used to collect breath samples,but they emit contaminants that affect accuracy.This issue was overlooked in previous studies.We found contamination issues with TB(e.g.,siloxanes and aromatic impurities)that affect the identification of volatile organic compounds(VOCs)due to impurities.Then,home-designed equipment(HD)made with poly-tetrafluoride(PTFE)and quartz glass for breath collection was developed and employed in clinical trials.15 healthy individuals and 32 non-small cell lung cancer(NSCLC)patients at IA stage participated in this study.610 VOCs can be collected through TB,which is less than HD(1109 VOCs),demonstrating that the inner wall of the TB easily adsorbs VOCs,leading to decreased detection concentrations.Otherwise,utilizing orthogonal partial least squares discriminant analysis(OPLS-DA),we identified chemical markers with significant discriminatory power(VIP>1.5,P<0.05).The HD method identified 12 target VOCs,surpassing the 3 target VOCs discerned by the TB method.A model combined with a machine learning algorithm for distinguishing early-stage lung cancer patients was established based on biomarkers,which were selected based on OPLS-DA.The results showed strong predictive capabilities for the HD-based model.It indicated that 12 biomarkers derived from the HD model were more effective in distinguishing NSCLC patients,with an AUC value of 0.92,compared to the AUC value of 0.5 from 3 markers obtained from the TB model.The sensitivity and specificity in the confusion matrix reached 100%and 80%for the HD test,but TB test reached only 40%and 60%.This work demonstrated that optimizing and standardizing VOCs collection methodology from breath of lung cancer patients is essential to identify actual volatiles,which could promote disease volatolomics worldwide.
基金the Phase-II Grand Challenges Explorations award from the Bill,Melinda Gates Foundation(Grant ID:OPP1109493)International Research Fellow of the Japan Society of the Promotion of Science(JSPS,Postdoctoral Fellowships for Research in Japan(Standard),P18334)+2 种基金the National Natural Science Foundation of China(21801243)the Natural Science Foundation of Shaanxi province(2018JM6045,2018JM1046)Research funding was received from Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration(SHUES2019A02).
文摘Chemi-resistive sensors based on hybrid functional materials are promising candidates for gas sensing with high responsivity,good selectivity,fast response/recovery,great stability/repeatability,room-working temperature,low cost,and easy-to-fabricate,for versatile applications.This progress report reviews the advantages and advances of these sensing structures compared with the single constituent,according to five main sensing forms:manipulating/constructing heterojunctions,catalytic reaction,charge transfer,charge carrier transport,molecular binding/sieving,and their combinations.Promises and challenges of the advances of each form are presented and discussed.Critical thinking and ideas regarding the orientation of the development of hybrid material-based gas sensor in the future are discussed.
基金supported by National Natural Science Foundation of China (No. 22104117)“the Fundamental Research Funds for the Central Universities” (No. JC2110)+1 种基金Wuhu and Xidian University special fund for industry-university-research cooperation (No. XWYCXY-012020012)Open Fund of Zhijiang Lab (No. 2021MC0AB02)
文摘Droplet-based microfluidics enables the generation of uniform microdroplets at picoliter or nanoliter scale with high frequency(∼kHz)under precise control.The droplets can function as bioreactors for versatile chemical/biological study and analysis.Taking advantage of the discrete compartment with a confined volume,(1)isolation and manipulation of a single cell,(2)improvement of in-droplet effective concen-trations,(3)elimination of heterogeneous population effects,(4)diminution of contamination risks can be achieved,making it a powerful tool for rapid,sensitive,and high-throughput detection and analysis of bacteria,even for rare or unculturable strains in conventional methods.This mini-review will focus on the generation and manipulation of micro-droplets and bacteria detection and analysis carried out by droplet-based microfluidics.Finally,applications with high potential of droplet-based bacteria analysis are briefly introduced.Due to the advantages of rapid,sensitive,high throughput,and compatibility with rare and unculturable bacteria in conventional methods,droplet-based microfluidics has tremendous potential of providing novel solutions for biological medicine,microbiological engineering,environmental ecology,etc.
基金supported by the National Natural Science Foundation of China (Nos. 81972488 and 81973013)the Eighth Affiliated Hospital of Sun Yat-sen University Outstanding Youth Reserve Talent Science Fund (No. FBJQ2019002)+2 种基金the Guangdong Key R&D Program (No. 2019B020210002)the Guangdong Natural Science Foundation (No. C1051164)China Postdoctoral Science Foundation(Nos. 2019TQ0242, 2019M660061XB)。
文摘Fast skin repair is critical for less infection, less pain and high quality of life, which is still limited with undesirable rehabilitation speed and side effects. Currently, laser-activated silk sealant agent without suture and gauze has been demonstrated promising for fast skin repair taking advantage of its structural transformation after heating. Nevertheless, more efficient healing effects and less side effects of laseractivated silk sealant agent remains challenging due to absence of suitable photo-thermal materials and robust/biomimetic protein materials. In this work, the marriage between silk protein and Rehmanniae radix preparata(a kind of the traditional Chinese herb) has been demonstrated as a novel and effective way to achieve an excellent healing effect for skin repair. The non-toxicity, high photothermal conversion efficiency and healing mechanism are systematically studied and proved. This new methodology might shed a new light for combining dark traditional Chinese medicine and silk fibroin for advanced wound healing technology.
基金financially supported by the National Natural Science Foundation of China(No.52336009)Guangdong Basic and Applied Basic Research Foundation(No.2023A1515010429)+4 种基金the Natural Science Basic Research Plan in Shaanxi Province of China(No.2024JC-YBQN-0475)Xidian University Specially Funded Project for Interdisciplinary Exploration(No.TZJH2024063)the Fundamental Research Funds for the Central Universities(No.QTZX23061)Qinchuangyuan Project(No.QCYRCXM-2022-236)the Innovation Center of Nuclear Power Technology(No.HDLCXZX-2022-ZH-013)
文摘Solid oxide fuel cell(SOFC)is a promising energy conversion device because of its high efficiency and fuel/oxidant flexibility,enabling the direct conversion of chemical energy to electrical power.By using N_(2)O as an oxidant instead of air,we develop a dual-phase catalyst La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ)-Gd_(0.1)Ce_(0.9)O_(2-δ)(LSCF-GDC),which exhibits efficient bifunctionality as a cathode for SOFC,synergistic ally promoting simultaneous N_(2)O decomposition and oxygen reduction kinetics.
基金funded by the National Natural Science Foundation of China(Grant No.21801243)the Fundamental Research Funds the Central Universities of China(Grant No.JC2002)the International Research Fellow of the Japan Society of the Promotion of Science(JSPS,Postdoctoral Fellowships for Research in Japan(Standard),P18334).
文摘Working temperature,sensitivity,and selectivity are some of the characteristics of the applied gas sensors.How to design and fabricate an ideal gas sensor working at room temperature is still challenging and attracting lots of interest.Two-dimensional(2D)materials with ultra-thin structure have been demonstrated as a family of ideal candidates to achieve this goal.Among them,Ti_(3)C_(2)T_(x) MXene,a kind of layered sheet synthesized by selectively etching MAX phases materials,shows remarkable potential to be the sensitive materials solely or in a composite.However,their designing rules are still lacking critical thinking from the viewpoint of the intrinsic property of Ti_(3)C_(2)T_(x) MXene based materials.In this article,two critical features,i.e.,the thickness of the sensitive materials,and the scope of the analytes,are elaborated towards Ti_(3)C_(2)T_(x) MXene based gas sensors after characterizing the performance of sensing reducing gases(NH3 and CO)and oxidizing gas(NO2).First,the thinner the Ti_(3)C_(2)T_(x) MXene sensitive layer,the better the sensitivity.Second,the Ti_(3)C_(2)T_(x) MXene based gas sensor is not suitable for strong and moderate oxidation gas due to its ease of oxidation.These two rules are demonstrated,and could be considered with priority both in the future researches and practical applications.
基金supported by the National Key Research and Development Program (2021YFB2500200)the National Natural Science Foundation of China (52177214,52222703)+1 种基金The Basic Science Research Fund in Xidian University (ZYTS24132)the Postdoctoral Science Research Program of Shaanxi (30102230001)。
文摘Argyrodite-based solid-state lithium metal batteries exhibit significant potential as next-generation energy storage devices.However,their practical applications are constrained by the intrinsic poor stability of argyrodite towards Li metal and exposure to air/moisture.Therefore,an indium-involved modification strategy is employed to address these issues.The optimized doping yields a high Li-ion conductivity of 7.5 mS cm^(-1)for Li_(5.54)In_(0.02)PS_(4.47)O_(0.03)Cl_(1.5)electrolyte,accompanied by enhanced endurance against air/moisture and bare Li metal.It retains 92.0%of its original conductivity after exposure to air at a low dew point of-60℃in dry room.Additionally,a composite layer comprising Li-In alloy and Li F phases is generated on the surface of lithium metal anode via the reaction between InF_(3)and molten Li.This layer effectively mitigates Li dendrite growth by creating a physical barrier from the robust LiF phase,while the Li-In alloy induces uniform Li-ion deposition and accelerates Li transport dynamics across the interphase between the solid electrolyte/Li metal.Moreover,the In-doped electrolyte facilitates the in-situ generation of Li-In alloy within its voids,reducing local current density and further inhibiting lithium dendrite growth.Consequently,the combination of the Li_(5.54)In_(0.02)PS_(4.47)O_(0.03)Cl_(1.5)electrolyte and the InF_(3)@Li anode provides exceptional electrochemical performances in both symmetric cells and solid-state lithium metal batteries across different operating temperatures.Specifically,the LiNbO_(3)@LiNi_(0.7)Co_(0.2)Mn_(0.1)O_(2)/Li_(5.54)In_(0.02)PS_(4.47)O_(0.03)Cl_(1.5)/InF_(3)@Li cell delivers a high discharge capacity of 167.8 mAh g^(-1)at 0.5 C under 25℃and retains 80.0%of its initial value after 400 cycles.This work offers a viable strategy for designing functional interfaces with enhanced stability for sulfide-based solid-state lithium batteries.
基金National Numerical Windtunnel Project(No.NNW2020ZT2-A21)Marie Sklodowska-Curie Actions:Individual Fellowship(No.H2020-MSCA-IF)[898486]+2 种基金Key Research and Development Program of Shaanxi(Nos.2022ZDLSF01-04 and 2020GXLH-Y-012)the National Natural Science Foundation of China(No.81972488)the Shenzhen Science and Technology Program(No.JCYJ20210324115209026).
文摘Various diseases increasingly challenge the health status and life quality of human beings.Volatolome emitted from patients has been considered as a potential family of markers,volatolomics,for diagnosis/screening.There are two fundamental issues of volatolomics in healthcare.On one hand,the solid relationship between the volatolome and specific diseases needs to be clarified and verified.On the other hand,effective methods should be explored for the precise detection of volatolome.Several comprehensive review articles had been published in this field.However,a timely and systematical summary and elaboration is still desired.In this review article,the research methodology of volatolomics in healthcare is critically considered and given out,at first.Then,the sets of volatolome according to specific diseases through different body sources and the analytical instruments for their identifications are systematically summarized.Thirdly,the advanced electronic nose and photonic nose technologies for volatile organic compounds(VOCs)detection are well introduced.The existed obstacles and future perspectives are deeply thought and discussed.This article could give a good guidance to researchers in this interdisciplinary field,not only understanding the cutting-edge detection technologies for doctors(medicinal background),but also making reference to clarify the choice of aimed VOCs during the sensor research for chemists,materials scientists,electronics engineers,etc.
基金supported by the National Natural Science Foundation of China(Nos.52073032 and 51872031)the Fundamental Research Funds for the Central Universities(No.JB211305).
文摘Interface functional groups play an essential role in regulating the electrical properties of bulk materials.In this work,we designed a novel strategy to explore a new way to enhance triboelectric performance by regulating the functional groups between nano-fillers and polymer matrix without obvious changes in the dielectric constant.The silica nanoparticles(SNPs)modified perfluoro-silane coupling agents(PFSCAs)with different chain lengths were added to the polyvinylidene difluoride to regulate the transferred charge density(TCD)of triboelectric nanogenerators(TENGs).When the doping concentration of perfluorodecyl modified SNPs is 2.25 wt.%,the nanocomposite film based TENG exhibits the maximum TCD of 166μC/m^(2)and power density of 3.12 W/m^(2)which are 6 times and 39 times as big as those of pure polyvinylidene difluoride(PVDF)film.The charge accumulation and decay process show that interface functional groups dominate the performance of TENGs.Then,a Fermi level model is proposed and why the TCD could be regulated by the concentration of nanoparticles in bulk materials is explained.This work provides a new concept for understanding the performance of TENG independent dielectric constant and points out a new direction for enhancing TENG’s performance,since wealthy functional groups with selectivity are applicable.
基金supported by the National Natural Science Foundation of China(No.U21A20317)the National Key Research and Development Program of China(No.2022YFA1504701)+2 种基金the Fundamental Research Funds for the Central Universities(No.2042022gf0002)the start-up research funds from Wuhan Institute of Technology(No.K202201)Guangdong Basic and Applied Basic Research Foundation(No.2023A1515010429).
文摘Stable and flexible metal nanoparticles(NPs)with regeneration ability are critical for long-term operation of solid oxide electrolysis cells(SOECs).Herein,a novel perovskite electrode with stoichiometric Pr_(0.4)Sr_(0.6)Co_(0.125)Fe_(0.75)Mo_(0.125)O_(3)−δ(PSFCM)is synthesized and studied,which undergoes multiple redox cycles to validate its structural stability and NPs reversibility.The Co-Fe alloy has exsolved from the parent bulk under reducing atmosphere,and is capable of reincorporation into the parent oxide after re-oxidation treatment.During the redox process,we successfully manipulate the size and population density of the exsolved NPs,and find that the average particle size significantly reduces but the population density increases correspondingly.The electrode polarization resistance of the symmetric cell remains stable for 450 h,and even activates after the redox cycling,which may be attributed to the higher quantity and larger specific surface area of the regenerated Co-Fe alloy NPs.Moreover,the electrochemical performance towards carbon dioxide reduction reaction(CO_(2)RR)is evaluated,and the CO_(2)electrolyzer consisting of CoFe@PSCFM-Ce_(0.8)Sm_(0.2)O_(1.9)(SDC)dual-phase electrode exhibits an excellent current density of 1.42 A·cm^(−2)at 1.6 V,which reaches 1.7 times higher than 0.83 A·cm^(−2)for the pristine PSCFM electrode.Overall,with this flexible and reversible high-performance SOEC cathode material,new options and perspectives are provided for the efficient and durable CO_(2)electrolysis.
基金This work was financially supported by the National Natural Science Foundation of China(Nos.22005234 and 61904134)Zhejiang Lab(No.2021MC0AB02).
文摘Ternary strategy is one of the most effective methods to further boost the power conversion efficiency(PCE)of organic photovoltaic cells(OPVs).In terms of high-efficiency PM6:Y6 binary systems,there is still room to further reduce energy_(loss)(E_(loss))through regulating molecular packing and aggregation by introducing a third component in the construction of ternary OPVs.Here we introduce a simple molecule BR1 based on an acceptor-donor-acceptor(A-D-A)structure with a wide bandgap and high crystallinity into PM6:Y6-based OPVs.It is proved that BR1 can be selectively dispersed into the donor phase in the PM6:Y6 and reduce disorder in the ternary blends,thus resulting in lower E_(loss,non-rad)and E_(loss).Furthermore,the mechanism study reveals well-develop phase separation morphology and complemented absorption spectra in the ternary blends,leading to higher charge mobility,suppressed recombination,which concurrently contributes to the significantly improved PCE of 17.23%for the ternary system compared with the binary ones(16.21%).This work provides an effective approach to improve the performance of the PM6:Y6-based OPVs by adopting a ternary strategy with a simple molecule as the third component.
