Human action recognition(HAR)is crucial for the development of efficient computer vision,where bioinspired neuromorphic perception visual systems have emerged as a vital solution to address transmission bottlenecks ac...Human action recognition(HAR)is crucial for the development of efficient computer vision,where bioinspired neuromorphic perception visual systems have emerged as a vital solution to address transmission bottlenecks across sensor-processor interfaces.However,the absence of interactions among versatile biomimicking functionalities within a single device,which was developed for specific vision tasks,restricts the computational capacity,practicality,and scalability of in-sensor vision computing.Here,we propose a bioinspired vision sensor composed of a Ga N/Al N-based ultrathin quantum-disks-in-nanowires(QD-NWs)array to mimic not only Parvo cells for high-contrast vision and Magno cells for dynamic vision in the human retina but also the synergistic activity between the two cells for in-sensor vision computing.By simply tuning the applied bias voltage on each QD-NW-array-based pixel,we achieve two biosimilar photoresponse characteristics with slow and fast reactions to light stimuli that enhance the in-sensor image quality and HAR efficiency,respectively.Strikingly,the interplay and synergistic interaction of the two photoresponse modes within a single device markedly increased the HAR recognition accuracy from 51.4%to 81.4%owing to the integrated artificial vision system.The demonstration of an intelligent vision sensor offers a promising device platform for the development of highly efficient HAR systems and future smart optoelectronics.展开更多
The electromagnetic wave absorption of silicon carbide nanowires is improved by their uniform and diverse cross-structures.This study introduces a sustainable and high value-added method for synthesizing silicon carbi...The electromagnetic wave absorption of silicon carbide nanowires is improved by their uniform and diverse cross-structures.This study introduces a sustainable and high value-added method for synthesizing silicon carbide nanowires using lignite and waste silicon powder as raw materials through carbothermal reduction.The staggered structure of nanowires promotes the creation of interfacial polarization,impedance matching,and multiple loss mechanisms,leading to enhanced electromagnetic absorption performance.The silicon carbide nanowires demonstrate outstanding electromagnetic absorption capabilities with the minimum reflection loss of-48.09 d B at10.08 GHz and an effective absorption bandwidth(the reflection loss less than-10 d B)ranging from 8.54 to 16.68 GHz with a thickness of 2.17 mm.This research presents an innovative approach for utilizing solid waste in an environmentally friendly manner to produce broadband silicon carbide composite absorbers.展开更多
Anti-phase domain defects easily form in the in-plane GaAs nanowires(NWs)grown on CMOS-compatiblegroup IV substrates,which makes it difficult to obtain GaAs NWs with a designed length and also leads to asignificant li...Anti-phase domain defects easily form in the in-plane GaAs nanowires(NWs)grown on CMOS-compatiblegroup IV substrates,which makes it difficult to obtain GaAs NWs with a designed length and also leads to asignificant limitation in the growth of high-quality in-plane GaAs NW networks on such substrates.Here,wereport on the selective area growth of anti-phase domain-free in-plane GaAs NWs and NW networks on Ge(111)substrates.Detailed structural studies confirm that the GaAs NW grown using a large pattern period and GaAsNW networks grown by adding the Sb are both high-quality pure zinc-blende single crystals free of stackingfaults,twin defects,and anti-phase domain defects.Room-temperature photoluminescence measurements show asubstantial improvement in crystal quality and good consistency and uniformity of the GaAs NW networks.Ourwork provides useful insights into the controlled growth of high-quality anti-phase domain-defects-free in-planeIII-V NWs and NW networks.展开更多
A polarization-sensitive and flexible photodetector was fabricated through the precise alignment of perovskite nanowires(NWs)using a brush coating technique.The alignment of the NWs was meticulously examined,consideri...A polarization-sensitive and flexible photodetector was fabricated through the precise alignment of perovskite nanowires(NWs)using a brush coating technique.The alignment of the NWs was meticulously examined,considering various chemical properties of the solvent,such as boiling point,viscosity,and surface tension.Notably,when the NWs were brush-coated with toluene dispersion,the NWs were aligned in higher order than those processed from octane dispersion.The degree of alignment was correlated with the photodetector property.Especially,the well-aligned NW photodetector exhibited a two-fold disparity in current response contingent on the polarization direction.Furthermore,even after enduring 500 bending cycles,the device retained 80%of its photodetector performance.This approach underscores the potential of solution-processed flexible photodetectors for advanced optical applications under dynamic operating conditions.展开更多
The fabrication of high-quality YBa_(2)Cu_(3)O_(7)−δ(YBCO)nanowires has garnered significant attention in the field of high-temperature superconductivity due to their potential applications in quantum communication,d...The fabrication of high-quality YBa_(2)Cu_(3)O_(7)−δ(YBCO)nanowires has garnered significant attention in the field of high-temperature superconductivity due to their potential applications in quantum communication,deep space exploration,and various other fields.Cl_(2)-assisted reactive ion etching(RIE)stands out as a more effective and efficient method for patterning scalable thin films.However,neither RIE nor high-density RIE has achieved superconducting YBCO nanowires with a width smaller than 3μm.Here,we delve into the factors that limit the line width of Cl_(2)-assisted inductively coupled plasma reactive ion etching(ICP-RIE)processing and the method to elimiate them.Our approach involves utilizing Cl_(2)/Ar as etching gas and incorporating a specialized vacuum heating process after etching.Our experimental results demonstrate the successful realization of 10 nm-thick YBCO nanowires with widths as small as 0.15μm,exhibiting excellent performance in terms of their intrinsic superconducting properties.The mechanism is evidenced by X-ray photoelectron spectroscopy(XPS)analysis in comparison of nanowires with and without heating treatment,in which the residual Cl_(2) on the sidewall of nanowires evaporates and oxidizes Cu^(+)back into Cu^(2+)in an unetched state.展开更多
Conventional superconducting nanowire single-photon detectors(SNSPDs)have been typically limited in their applications due to their size,weight,and power consumption,which confine their use to laboratory settings.Howe...Conventional superconducting nanowire single-photon detectors(SNSPDs)have been typically limited in their applications due to their size,weight,and power consumption,which confine their use to laboratory settings.However,with the rapid development of remote imaging,sensing technologies,and long-range quantum communication with fewer topographical constraints,the demand for high-efficiency single-photon detectors integrated with avionic platforms is rapidly growing.We herein designed and manufactured the first drone-based SNSPD system with a system detection efficiency(SDE)as high as 91.8%.This drone-based system incorporates high-performance NbTiN SNSPDs,a self-developed miniature liquid helium dewar,and custom-built integrated electrical setups,making it capable of being launched in complex topographical conditions.Such a drone-based SNSPD system may open the use of SNSPDs for applications that demand high SDE in complex environments.展开更多
As modern communication and detection technologies advance at a swift pace,multifunctional electromagnetic interference(EMI)shielding materials with active/positive infrared stealth,hydrophobicity,and electric-thermal...As modern communication and detection technologies advance at a swift pace,multifunctional electromagnetic interference(EMI)shielding materials with active/positive infrared stealth,hydrophobicity,and electric-thermal conversion ability have received extensive attention.Meeting the aforesaid requirements simultaneously remains a huge challenge.In this research,the melamine foam(MF)/polypyrrole(PPy)nanowire arrays(MF@PPy)were fabricated via one-step electrochemical polymerization.The hierarchical MF@PPy foam was composed of three-dimensional PPy micro-skeleton and ordered PPy nanowire arrays.Due to the upwardly grown PPy nanowire arrays,the MF@PPy foam possessed good hydrophobicity ability with a water contact angle of 142.00°and outstanding stability under various harsh environments.Meanwhile,the MF@PPy foam showed excellent thermal insulation property on account of the low thermal conductivity and elongated ligament characteristic of PPy nanowire arrays.Furthermore,taking advantage of the high conductivity(128.2 S m^(-1)),the MF@PPy foam exhibited rapid Joule heating under 3 V,resulting in dynamic infrared stealth and thermal camouflage effects.More importantly,the MF@PPy foam exhibited remarkable EMI shielding effectiveness values of 55.77 dB and 19,928.57 dB cm^(2)g^(-1).Strong EMI shielding was put down to the hierarchically porous PPy structure,which offered outstanding impedance matching,conduction loss,and multiple attenuations.This innovative approach provides significant insights to the development of advanced multifunctional EMI shielding foams by constructing PPy nanowire arrays,showing great applications in both military and civilian fields.展开更多
High-performance perovskite photodetectors with self-driven characteristic usually need electron/hole transport layers to extract carriers. However, these devices with transport layer structure are prone to result in ...High-performance perovskite photodetectors with self-driven characteristic usually need electron/hole transport layers to extract carriers. However, these devices with transport layer structure are prone to result in a poor perovskite/transport layer interface, which restricts the performance and stability of the device. To solve this problem, this work reports a novel device structure in which perovskite nanowires are in-situ prepared on PbI_(2), which serves as both a reaction raw material and efficient carrier extraction layer. By optimizing the thickness of PbI_(2), nanowire growth time, and ion exchange time, a selfdriven photodetector with an ITO/PbI_(2)/CsPbBr_(3)/carbon structure is constructed. The optimized device achieves excellent performance with the responsivity of 0.33 A/W, the detectivity of as high as 3.52 × 10^(13) Jones. Furthermore, the device can detect the light with its optical power lowered to 0.1 nW/cm^(2). This research provides a new method for preparing perovskite nano/micro devices with simple structure but excellent performance.展开更多
Silicon nanowires(SiNWs)have been used in a wide variety of applications over the past few decades due to their excellent material properties.The only drawback is the high production cost of SiNWs.The preparation of S...Silicon nanowires(SiNWs)have been used in a wide variety of applications over the past few decades due to their excellent material properties.The only drawback is the high production cost of SiNWs.The preparation of SiNWs from photovoltaic waste silicon(WSi)powders,which are high-volume industrial wastes,not only avoids the secondary energy consumption and environmental pollution caused by complicated recycling methods,but also realizes its high-value utilization.Herein,we present a method to rapidly convert photovoltaic WSi powders into SiNWs products.The flash heating and quenching provided by carbothermal shock induce the production of free silicon atoms from the WSi powders,which are rapidly reorganized and assembled into SiNWs during the vapor-phase process.This method allows for the one-step composite of SiNWs and carbon cloth(CC)and the formation of SiC at the interface of the silicon(Si)and carbon(C)contact to create a stable chemical connection.The obtained SiNWs-CC(SiNWs@CC)composites can be directly used as lithium anodes,exhibiting high initial coulombic efficiency(86.4%)and stable cycling specific capacity(2437.4 mA h g^(-1)at 0.5 A g^(-1)after 165 cycles).In addition,various SiNWs@C composite electrodes are easily prepared using this method.展开更多
Due to excellent thermal insulation performance at room temperature and ultralow density,silica aero-gels are candidates for thermal insulation.However,at high temperatures,the thermal insulation prop-erty of silica a...Due to excellent thermal insulation performance at room temperature and ultralow density,silica aero-gels are candidates for thermal insulation.However,at high temperatures,the thermal insulation prop-erty of silica aerogels decreased greatly caused by transparency to heat radiation.Opacifiers introduced into silica sol can block heat radiation yet destroy the uniformity of aerogels.Herein,we designed and prepared a silica aerogel composite with oriented and layered silica fibers(SFs),SiC nanowires(SiC_(NWs)),and silica aerogels,which were prepared by papermaking,chemical vapor infiltration(CVI),and sol-gel respectively.Firstly,oriented and layered SFs made still air a wall to block heat transfer by the solid phase.Secondly,SiC_(NWs) were grown in situ on the surface of SFs evenly to weave into the network,and the network reduced the gaseous thermal conductivity by dividing cracks in SFs/SiC_(NWs)/SA.Thirdly,SiC_(NWs) weakened the heat transfer by radiation at high temperatures.Therefore,SFs/SiC_(NWs)/SA presented remarkable thermal insulation(0.017 W(m K)^(-1) at 25℃,0.0287 W(m K)^(-1) at 500℃,and 0.094 W(m K)^(-1) at 1000℃).Besides,SFs/SiC_(NWs)/SA exhibited remarkable thermal stability(no size transform after being heat treated at 1000℃ for 1800 s)and tensile strength(0.75 MPa).These integrated properties made SFs/SiC_(NWs)/SA a promising candidate for highly efficient thermal insulators.展开更多
Confining particles in one-dimensional(1D)systems profoundly modifies their electronic behaviors,which have been extensively demonstrated in carbon nanotubes and atomic chains.Structural instabilities and electron loc...Confining particles in one-dimensional(1D)systems profoundly modifies their electronic behaviors,which have been extensively demonstrated in carbon nanotubes and atomic chains.Structural instabilities and electron localizations often dominate the conductivity of 1D nanowires.Here,we successfully grew Bi single nanowires and nanowire arrays on Pb-√7×√3substrates via molecular beam epitaxy,both of which exhibit metallic behavior.Using scanning tunneling microscopy and first-principles density functional theory calculations,the interwire coupling and the correlation between nanowire bundles and electronic properties are investigated.A characteristic peak at 0.75 e V is observed on single wires and wire bundles of up to four nanowires,whereas interwire coupling weakens it and makes it disappear for wire bundles of five and above.These findings illustrate that the interwire coupling plays a critical role in the electronic structure of the1D system,which provides insights for the design of nano-electronics materials.展开更多
Semitransparent organic photovoltaics(ST-OPVs)for building integration represent a pivotal direction in the development of photovoltaic industry.Solution-processed silver nanowires(AgNWs)are considered promising candi...Semitransparent organic photovoltaics(ST-OPVs)for building integration represent a pivotal direction in the development of photovoltaic industry.Solution-processed silver nanowires(AgNWs)are considered promising candidates for transparent electrodes in semitransparent devices due to their high transparency-conductivity-efficiency merit,large-scale processability,and low cost.In this work,we develop two solution-processed organic–inorganic hybrid electrodes,named AgNWs-PD and AgNWsPC,utilizing AgNWs as the conductive framework and aliphatic amine-functionalized perylene-diimide(PDINN)as the sandwiched material,while AgNWs-PC exhibits significantly improved electrical conductivity and enhanced contact area with the underlying electron transport layer.The optimized device achieves a power conversion efficiency of 9.45%with an open circuit voltage of 0.846 V,a high filling factor of 75.4%,and an average visible transmittance(AVT)of 44.0%,delivering an outstanding light utilization efficiency(LUE)of 4.16%,which is the highest reported value for all solution-processed ST-OPVs.In addition,by coupling a 30-nm tellurium dioxide atop AgNWs-PC,the bifaciality factor of derivative devices improves from 73.7%to 99.4%,while maintaining a high bifacial LUE over 3.7%.Our results emphasize the superiority and effectiveness of PDINN-sandwiched AgNWs electrodes for highperformance and all solution-processed ST-OPVs.展开更多
Diamond,an ultrawide-bandgap semiconductor material,is promising for solar-blind ultraviolet photodetectors in extreme environments.However,when exposed to high-temperature conditions,diamond photodetector surfaces ar...Diamond,an ultrawide-bandgap semiconductor material,is promising for solar-blind ultraviolet photodetectors in extreme environments.However,when exposed to high-temperature conditions,diamond photodetector surfaces are unavoidably terminated with oxygen,leading to low photoresponsivity.To address this limitation,single-crystalline diamond nanowires(DNWs)embedded with platinum(Pt)nanoparticles were developed using Pt film deposition followed by chemical vapor deposition(CVD)homoepitaxial growth.During the CVD,Pt nanoparticles(approximately 20 nm in diameter)undergo dewetting and become uniformly embedded within the single-crystalline DNWs.Photodetectors fabricated with these Pt nanoparticles-embedded DNWs achieve a responsivity of 68.5 A W^(−1) under 220 nm illumination at room temperature,representing an improvement of approximately 2000 times compared to oxygen-terminated bulk diamond devices.Notably,the responsivity further increases with temperature,reaching an exceptional value of 3098.7 A W^(−1) at 275℃.This outstanding performance is attributed to the synergistic effects of the one-dimensional nanowire structure,deep-level defects,the localized surface plasmon resonance effects induced by embedded Pt nanoparticles,and localized Schottky junctions at the Pt/diamond interface,which enhance optical absorption,carrier generation,and separation efficiency.These results highlight the significant potential of Pt nanoparticles-embedded DNWs for advanced deep ultraviolet detection in harsh environments,including aerospace,industrial monitoring,and other applications.展开更多
Silicon carbide(core third-generation wide-bandgap semiconductor)nanowires have superior characteristics and vital engineering potential in microelectric and photonic devices operating in harsh high-temperature and st...Silicon carbide(core third-generation wide-bandgap semiconductor)nanowires have superior characteristics and vital engineering potential in microelectric and photonic devices operating in harsh high-temperature and strong-irradiation environments.Herein,the dense monocrystalline forest-like 4H-and 6H-SiC nanowires(intrinsically bound as a single crystal)are fabricated using the top–down peeling method.They exhibit broadband light emissions spanning the red–green–blue spectral region.The naturally formed microcavity encapsulating the SiC nanowires yields discrete and multimodal emission lines;the luminescence lifetimes decrease to the order of picoseconds owing to improved photon density of states in the microcavity by the quantum electrodynamic Purcell effect.The measured Purcell factor of 8.35 agrees well with the theoretical value of 8.6.The low-temperature luminescence and work functions show significant dependence on the nanowire polytype.The luminescence exhibits peculiar staircase-function enhancement when the temperature is elevated to 200 K,owing to suppression of nonradiative transition channels.展开更多
Multifunctional flexible sensors as wearable electronic systems have attracted considerable attention for mimicking human skin to sense ambient stimuli.However,sensors need to have high resolution,stability and sensit...Multifunctional flexible sensors as wearable electronic systems have attracted considerable attention for mimicking human skin to sense ambient stimuli.However,sensors need to have high resolution,stability and sensitivity to realize fully biomimetic skin.Here,an assembled and welded Ag/W composite nanowire flexible electrode was prepared for body motion monitoring and flexible heaters.This Ag/W composite nanowire flexible electrode has a high transmittance of 90.1%(at 121Ω·sq^(−1) sheet resistance)and a low sheet resistance of 27Ω·sq^(−1)(at 60.1%transmittance).Although the transparency of this electrode is not high,the fluctuation in relative resistance change rate at 10%strain is only 5%after 1000 tensile cycles.It can be employed to monitor human body motions,including bending of fingers,arms,wrists,and throat action.Meanwhile,the Ag/W nanowires composite film heater achieves a steady-state temperature of up to 100℃ at a constant voltage of 3.5 V and an instantaneous heating rate of up to 36.5℃·s^(−1).展开更多
Metallic nanowires have served as novel materials for soft electronics due to their outstanding mechanical compliance and electrical properties.However,weak adhesion and low mechanical robustness of nanowire networks ...Metallic nanowires have served as novel materials for soft electronics due to their outstanding mechanical compliance and electrical properties.However,weak adhesion and low mechanical robustness of nanowire networks to substrates significantly undermine their reliability,necessitating the use of an insulating protective layer,which greatly limits their utility.Herein,we present a versatile and generalized laser-based process that simultaneously achieves strong adhesion and mechanical robustness of nanowire networks on diverse substrates without the need for a protective layer.In this method,the laser-induced photothermal energy at the interface between the nanowire network and the substrate facilitates the interpenetration of the nanowire network and the polymer matrix,resulting in mechanical interlocking through percolation.This mechanism is broadly applicable across different metallic nanowires and thermoplastic substrates,significantly enhancing its universality in diverse applications.Thereby,we demonstrated the mechanical robustness of nanowires in reusable wearable physiological sensors on the skin without compromising the performance of the sensor.Furthermore,enhanced robustness and electrical conductivity by the laser-induced interlocking enables a stable functionalization of conducting polymers in a wet environment,broadening its application into various electrochemical devices.展开更多
Human vision,confined to visible wavelengths,represents a mere fraction of the electromagnetic spectrum exploited by other species.Pit vipers detect infrared radiation through specialized pit organs,integrating therma...Human vision,confined to visible wavelengths,represents a mere fraction of the electromagnetic spectrum exploited by other species.Pit vipers detect infrared radiation through specialized pit organs,integrating thermal and visual data to navigate darkness[1].Conventional retinal prosthetics,limited to visible light and requiring external power or injectable nanomaterials,fail to address this sensory deficit[2–5].展开更多
Exploiting high-performance absorption-dominant electromagnetic interference(EMI)shielding composites is urgently desired yet challenging for minimizing secondary electromagnetic radiation pollution.Herein,a nickel(Ni...Exploiting high-performance absorption-dominant electromagnetic interference(EMI)shielding composites is urgently desired yet challenging for minimizing secondary electromagnetic radiation pollution.Herein,a nickel(Ni)shell was in-situ grown on a copper nanowires(CuNWs)core to greatly improve the stability of CuNWs,while maintaining excellent electrical conductivity.Afterward,Ni nanowires/Ni@Cu nanowires/graphite paper/waterborne polyurethane(NiNWs/Ni@CuNWs/graphite paper/WPU,n Ni-m Ni@Cu-G)composite foams with the multilayered gradient architectures were fabricated by a facile multi-step freeze-casting method.In the resultant composite foams,the lowly conductive porous NiNWs/WPU layer plays a role as the impedance matching layer,the moderately conductive porous Ni@CuNWs/WPU layer acts as the transition layer,and the highly conductive graphite paper layer serves as the reflection layer.Arising from the rational layout of multilayered gradient magnetic-electrical networks,n Ni-m Ni@Cu-G foam holds the superior averaged total EMI shielding effectiveness(EMI SET)of 75.2 dB and optimal absorption coefficient(A)of 0.93 at the incident direction from NiNWs/WPU layer,suggesting the dominant absorption in EMI shielding mechanism and efficiently alleviating the secondary electromagnetic pollution.Furthermore,n Ni-m Ni@Cu-G foam also exhibits fascinating compressive properties with a compressive strength of 49.3 kPa,which is essential for its practical application.This multilayered gradient architecture design provides valuable insight into high-efficiently constructing absorption-dominant EMI shielding composites.展开更多
Heteroatom doping is a promising strategy for designing cost-effective and stable electrocatalysts toward the oxygen evolution reaction(OER),but the enhancement mechanism remains unclear.Herein,atomic Ir-O-Cu and Ir-O...Heteroatom doping is a promising strategy for designing cost-effective and stable electrocatalysts toward the oxygen evolution reaction(OER),but the enhancement mechanism remains unclear.Herein,atomic Ir-O-Cu and Ir-O-Ir motifs are engineered into CuO nanowires via cation exchange and dehydration to elucidate the OER mechanism.Systematic characterizations confirm the atomic dispersion of Ir within the CuO lattice and the electron transfer from Ir to CuO while preserving the host structure.The asprepared single-atom Ir-doped CuO(IrSA-CuO),featuring predominant Cu-O-Ir motifs and coexisting IrO-Ir motifs,achieves a low OER overpotential of 204 mV at 10 mA cm^(-2)in 1 M KOH,coupled with a 69-fold higher mass activity than commercial IrO_(2).Furthermore,the Ir_(SA)-CuO maintains long-term stability for 300 h at 200 mA cm^(-2)with minimal overpotential alteration and an additional 120 h at500 mA cm^(-2)with overpotential increased by 15 mV.In situ Raman spectroscopy reveals that the Ir-O-Ir motifs suppress Cu^(Ⅱ) oxidation to Cu^(Ⅲ) by delaying the onset potential,enhancing the structural stability during OER.Density functional theory calculations demonstrate the Cu-O-Ir motifs lower the adsorption energy of bridged ^(*)O via asymmetric bonding,accelerating ^(*)OOH formation in the ratedetermining step.This work presents a heteroatom engineering strategy to balance electrocatalytic activity and durability,providing a blueprint for industrial electrocatalyst design.展开更多
Low power consumption,high responsivity,and self-powering are key objectives for photoelectrochemical ultravio-let detectors.In this research,In-dopedα-Ga_(2)O_(3) nanowire arrays were fabricated on fluorine-doped ti...Low power consumption,high responsivity,and self-powering are key objectives for photoelectrochemical ultravio-let detectors.In this research,In-dopedα-Ga_(2)O_(3) nanowire arrays were fabricated on fluorine-doped tin oxide(FTO)substrates through a hydrothermal approach,with subsequent thermal annealing.These arrays were then used as photoanodes to con-struct a ultraviolet(UV)photodetector.In doping reduced the bandgap ofα-Ga_(2)O_(3),enhancing its absorption of UV light.Conse-quently,the In-dopedα-Ga_(2)O_(3) nanowire arrays exhibited excellent light detection performance.When irradiated by 255 nm deep ultraviolet light,they obtained a responsivity of 38.85 mA/W.Moreover,the detector's response and recovery times are 13 and 8 ms,respectively.The In-dopedα-Ga_(2)O_(3) nanowire arrays exhibit a responsivity that is about three-fold higher than the undoped one.Due to its superior responsivity,the In-doped device was used to develop a photoelectric imaging system.This study demonstrates that dopingα-Ga_(2)O_(3) nanowire with indium is a potent approach for optimizing their photoelectrochemi-cal performance,which also has significant potential for optoelectronic applications.展开更多
基金funded by the National Natural Science Foundation of China(Grant Nos.62322410,52272168,624B2135,61804047)the Fundamental Research Funds for the Central Universities(No.WK2030000103)。
文摘Human action recognition(HAR)is crucial for the development of efficient computer vision,where bioinspired neuromorphic perception visual systems have emerged as a vital solution to address transmission bottlenecks across sensor-processor interfaces.However,the absence of interactions among versatile biomimicking functionalities within a single device,which was developed for specific vision tasks,restricts the computational capacity,practicality,and scalability of in-sensor vision computing.Here,we propose a bioinspired vision sensor composed of a Ga N/Al N-based ultrathin quantum-disks-in-nanowires(QD-NWs)array to mimic not only Parvo cells for high-contrast vision and Magno cells for dynamic vision in the human retina but also the synergistic activity between the two cells for in-sensor vision computing.By simply tuning the applied bias voltage on each QD-NW-array-based pixel,we achieve two biosimilar photoresponse characteristics with slow and fast reactions to light stimuli that enhance the in-sensor image quality and HAR efficiency,respectively.Strikingly,the interplay and synergistic interaction of the two photoresponse modes within a single device markedly increased the HAR recognition accuracy from 51.4%to 81.4%owing to the integrated artificial vision system.The demonstration of an intelligent vision sensor offers a promising device platform for the development of highly efficient HAR systems and future smart optoelectronics.
基金supported by the National Natural Science Foundation of China(No.52436008)the Inner Mongolia Science and Technology Projects,China(Nos.JMRHZX20210003 and 2023YFCY0009)+3 种基金the Huaneng Group Co Ltd.,China(No.HNKJ23-H50)the National Natural Science Foundation of China(No.22408044)the China Postdoctoral Science Foundation(No.2024M761877)the National Key R&D Program of China(No.SQ2024YFD2200039)。
文摘The electromagnetic wave absorption of silicon carbide nanowires is improved by their uniform and diverse cross-structures.This study introduces a sustainable and high value-added method for synthesizing silicon carbide nanowires using lignite and waste silicon powder as raw materials through carbothermal reduction.The staggered structure of nanowires promotes the creation of interfacial polarization,impedance matching,and multiple loss mechanisms,leading to enhanced electromagnetic absorption performance.The silicon carbide nanowires demonstrate outstanding electromagnetic absorption capabilities with the minimum reflection loss of-48.09 d B at10.08 GHz and an effective absorption bandwidth(the reflection loss less than-10 d B)ranging from 8.54 to 16.68 GHz with a thickness of 2.17 mm.This research presents an innovative approach for utilizing solid waste in an environmentally friendly manner to produce broadband silicon carbide composite absorbers.
基金supported by the National Natural Science Foundation of China(Grant Nos.12374459,61974138,and 92065106)the Innovation Program for Quantum Science and Technology(Grant No.2021ZD0302400)+1 种基金the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDB0460000)the support from the Youth Innovation Promotion Association,Chinese Academy of Sciences(Grant Nos.2017156 and Y2021043)。
文摘Anti-phase domain defects easily form in the in-plane GaAs nanowires(NWs)grown on CMOS-compatiblegroup IV substrates,which makes it difficult to obtain GaAs NWs with a designed length and also leads to asignificant limitation in the growth of high-quality in-plane GaAs NW networks on such substrates.Here,wereport on the selective area growth of anti-phase domain-free in-plane GaAs NWs and NW networks on Ge(111)substrates.Detailed structural studies confirm that the GaAs NW grown using a large pattern period and GaAsNW networks grown by adding the Sb are both high-quality pure zinc-blende single crystals free of stackingfaults,twin defects,and anti-phase domain defects.Room-temperature photoluminescence measurements show asubstantial improvement in crystal quality and good consistency and uniformity of the GaAs NW networks.Ourwork provides useful insights into the controlled growth of high-quality anti-phase domain-defects-free in-planeIII-V NWs and NW networks.
基金supported by a Commercialization Promotion Agency for R&D Outcomes(COMPA)Grant funded by the Korean Government(Ministry of Science and ICT)(No.RS-2023-00304743)the National Research Foundation of Korea(NRF)Grant funded by the Korean Government(MSIT)(No.2022M3J7A1066428)"Regional Innovation Strategy(RIS)"through the National Research Foundation of Korea(NRF)funded by the Ministry of Education(MOE)(No.2023RIS-008).
文摘A polarization-sensitive and flexible photodetector was fabricated through the precise alignment of perovskite nanowires(NWs)using a brush coating technique.The alignment of the NWs was meticulously examined,considering various chemical properties of the solvent,such as boiling point,viscosity,and surface tension.Notably,when the NWs were brush-coated with toluene dispersion,the NWs were aligned in higher order than those processed from octane dispersion.The degree of alignment was correlated with the photodetector property.Especially,the well-aligned NW photodetector exhibited a two-fold disparity in current response contingent on the polarization direction.Furthermore,even after enduring 500 bending cycles,the device retained 80%of its photodetector performance.This approach underscores the potential of solution-processed flexible photodetectors for advanced optical applications under dynamic operating conditions.
基金supported by the National Key Research and Development Program of China(No.2021YFA0718800)the Natural Science Foundation of Sichuan Province(No.2023NSFSC0993)+1 种基金the National Natural Science Foundation of China(Nos.52021001,U22A20132 and 12074056)Sichuan Science and Technology Program(No.2021JDTD0010).
文摘The fabrication of high-quality YBa_(2)Cu_(3)O_(7)−δ(YBCO)nanowires has garnered significant attention in the field of high-temperature superconductivity due to their potential applications in quantum communication,deep space exploration,and various other fields.Cl_(2)-assisted reactive ion etching(RIE)stands out as a more effective and efficient method for patterning scalable thin films.However,neither RIE nor high-density RIE has achieved superconducting YBCO nanowires with a width smaller than 3μm.Here,we delve into the factors that limit the line width of Cl_(2)-assisted inductively coupled plasma reactive ion etching(ICP-RIE)processing and the method to elimiate them.Our approach involves utilizing Cl_(2)/Ar as etching gas and incorporating a specialized vacuum heating process after etching.Our experimental results demonstrate the successful realization of 10 nm-thick YBCO nanowires with widths as small as 0.15μm,exhibiting excellent performance in terms of their intrinsic superconducting properties.The mechanism is evidenced by X-ray photoelectron spectroscopy(XPS)analysis in comparison of nanowires with and without heating treatment,in which the residual Cl_(2) on the sidewall of nanowires evaporates and oxidizes Cu^(+)back into Cu^(2+)in an unetched state.
基金the Innovation Program for Quantum Science and Technology(Grant No.2023ZD0300100)the National Key Research and Development Program of China(Grant Nos.2023YFB3809600 and 2023YFC3007801)+1 种基金the National Natural Science Foundation of China(Grant Nos.62301543 and U24A20320)the Shanghai Sailing Program(Grant No.21YF1455700).
文摘Conventional superconducting nanowire single-photon detectors(SNSPDs)have been typically limited in their applications due to their size,weight,and power consumption,which confine their use to laboratory settings.However,with the rapid development of remote imaging,sensing technologies,and long-range quantum communication with fewer topographical constraints,the demand for high-efficiency single-photon detectors integrated with avionic platforms is rapidly growing.We herein designed and manufactured the first drone-based SNSPD system with a system detection efficiency(SDE)as high as 91.8%.This drone-based system incorporates high-performance NbTiN SNSPDs,a self-developed miniature liquid helium dewar,and custom-built integrated electrical setups,making it capable of being launched in complex topographical conditions.Such a drone-based SNSPD system may open the use of SNSPDs for applications that demand high SDE in complex environments.
基金supported by the Key Research and Development Program of Sichuan Province(Grant No.2023ZHCG0050)the Fundamental Research Funds for the Central Universities of China(Grant No.2682024QZ006 and 2682024ZTPY042)the Analytic and Testing Center of Southwest Jiaotong University.
文摘As modern communication and detection technologies advance at a swift pace,multifunctional electromagnetic interference(EMI)shielding materials with active/positive infrared stealth,hydrophobicity,and electric-thermal conversion ability have received extensive attention.Meeting the aforesaid requirements simultaneously remains a huge challenge.In this research,the melamine foam(MF)/polypyrrole(PPy)nanowire arrays(MF@PPy)were fabricated via one-step electrochemical polymerization.The hierarchical MF@PPy foam was composed of three-dimensional PPy micro-skeleton and ordered PPy nanowire arrays.Due to the upwardly grown PPy nanowire arrays,the MF@PPy foam possessed good hydrophobicity ability with a water contact angle of 142.00°and outstanding stability under various harsh environments.Meanwhile,the MF@PPy foam showed excellent thermal insulation property on account of the low thermal conductivity and elongated ligament characteristic of PPy nanowire arrays.Furthermore,taking advantage of the high conductivity(128.2 S m^(-1)),the MF@PPy foam exhibited rapid Joule heating under 3 V,resulting in dynamic infrared stealth and thermal camouflage effects.More importantly,the MF@PPy foam exhibited remarkable EMI shielding effectiveness values of 55.77 dB and 19,928.57 dB cm^(2)g^(-1).Strong EMI shielding was put down to the hierarchically porous PPy structure,which offered outstanding impedance matching,conduction loss,and multiple attenuations.This innovative approach provides significant insights to the development of advanced multifunctional EMI shielding foams by constructing PPy nanowire arrays,showing great applications in both military and civilian fields.
基金financially supported by the National Natural Science Foundation of China (51972101)the Research platforms and projects of Guangdong Universities in 2022 (2022ZDZX1028)Guangdong Provincial Key Laboratory Project (2023KSYS003)。
文摘High-performance perovskite photodetectors with self-driven characteristic usually need electron/hole transport layers to extract carriers. However, these devices with transport layer structure are prone to result in a poor perovskite/transport layer interface, which restricts the performance and stability of the device. To solve this problem, this work reports a novel device structure in which perovskite nanowires are in-situ prepared on PbI_(2), which serves as both a reaction raw material and efficient carrier extraction layer. By optimizing the thickness of PbI_(2), nanowire growth time, and ion exchange time, a selfdriven photodetector with an ITO/PbI_(2)/CsPbBr_(3)/carbon structure is constructed. The optimized device achieves excellent performance with the responsivity of 0.33 A/W, the detectivity of as high as 3.52 × 10^(13) Jones. Furthermore, the device can detect the light with its optical power lowered to 0.1 nW/cm^(2). This research provides a new method for preparing perovskite nano/micro devices with simple structure but excellent performance.
基金partially funded by the National Natural Science Foundation of China(52074255,52274412)。
文摘Silicon nanowires(SiNWs)have been used in a wide variety of applications over the past few decades due to their excellent material properties.The only drawback is the high production cost of SiNWs.The preparation of SiNWs from photovoltaic waste silicon(WSi)powders,which are high-volume industrial wastes,not only avoids the secondary energy consumption and environmental pollution caused by complicated recycling methods,but also realizes its high-value utilization.Herein,we present a method to rapidly convert photovoltaic WSi powders into SiNWs products.The flash heating and quenching provided by carbothermal shock induce the production of free silicon atoms from the WSi powders,which are rapidly reorganized and assembled into SiNWs during the vapor-phase process.This method allows for the one-step composite of SiNWs and carbon cloth(CC)and the formation of SiC at the interface of the silicon(Si)and carbon(C)contact to create a stable chemical connection.The obtained SiNWs-CC(SiNWs@CC)composites can be directly used as lithium anodes,exhibiting high initial coulombic efficiency(86.4%)and stable cycling specific capacity(2437.4 mA h g^(-1)at 0.5 A g^(-1)after 165 cycles).In addition,various SiNWs@C composite electrodes are easily prepared using this method.
基金supported by the National Natural Science Foun-dation of China(Grant No.U2167214).
文摘Due to excellent thermal insulation performance at room temperature and ultralow density,silica aero-gels are candidates for thermal insulation.However,at high temperatures,the thermal insulation prop-erty of silica aerogels decreased greatly caused by transparency to heat radiation.Opacifiers introduced into silica sol can block heat radiation yet destroy the uniformity of aerogels.Herein,we designed and prepared a silica aerogel composite with oriented and layered silica fibers(SFs),SiC nanowires(SiC_(NWs)),and silica aerogels,which were prepared by papermaking,chemical vapor infiltration(CVI),and sol-gel respectively.Firstly,oriented and layered SFs made still air a wall to block heat transfer by the solid phase.Secondly,SiC_(NWs) were grown in situ on the surface of SFs evenly to weave into the network,and the network reduced the gaseous thermal conductivity by dividing cracks in SFs/SiC_(NWs)/SA.Thirdly,SiC_(NWs) weakened the heat transfer by radiation at high temperatures.Therefore,SFs/SiC_(NWs)/SA presented remarkable thermal insulation(0.017 W(m K)^(-1) at 25℃,0.0287 W(m K)^(-1) at 500℃,and 0.094 W(m K)^(-1) at 1000℃).Besides,SFs/SiC_(NWs)/SA exhibited remarkable thermal stability(no size transform after being heat treated at 1000℃ for 1800 s)and tensile strength(0.75 MPa).These integrated properties made SFs/SiC_(NWs)/SA a promising candidate for highly efficient thermal insulators.
基金supported by the National Natural Science Foundation of China(Grant Nos.12374196,92165201,and 11634011)the Innovation Program for Quantum Science and Technology(Grant No.2021ZD0302800)+2 种基金the CAS Project for Young Scientists in Basic Research(Grant No.YSBR-046)the Fundamental Research Funds for the Central Universities(Grant Nos.WK3510000006 and WK3430000003)the Initiative Project in Quantum Information Technologies of Anhui Province,China(Grant No.AHY170000)。
文摘Confining particles in one-dimensional(1D)systems profoundly modifies their electronic behaviors,which have been extensively demonstrated in carbon nanotubes and atomic chains.Structural instabilities and electron localizations often dominate the conductivity of 1D nanowires.Here,we successfully grew Bi single nanowires and nanowire arrays on Pb-√7×√3substrates via molecular beam epitaxy,both of which exhibit metallic behavior.Using scanning tunneling microscopy and first-principles density functional theory calculations,the interwire coupling and the correlation between nanowire bundles and electronic properties are investigated.A characteristic peak at 0.75 e V is observed on single wires and wire bundles of up to four nanowires,whereas interwire coupling weakens it and makes it disappear for wire bundles of five and above.These findings illustrate that the interwire coupling plays a critical role in the electronic structure of the1D system,which provides insights for the design of nano-electronics materials.
基金financially supported by the National Natural Science Foundation of China(21905137)the Research Grants Council of Hong Kong(15307922,C5037-18G,C4005-22Y)+1 种基金RGC Senior Research Fellowship Scheme(SRFS2223-5S01)the Hong Kong Polytechnic University:Sir Sze-yuen Chung Endowed Professorship Fund(8-8480)。
文摘Semitransparent organic photovoltaics(ST-OPVs)for building integration represent a pivotal direction in the development of photovoltaic industry.Solution-processed silver nanowires(AgNWs)are considered promising candidates for transparent electrodes in semitransparent devices due to their high transparency-conductivity-efficiency merit,large-scale processability,and low cost.In this work,we develop two solution-processed organic–inorganic hybrid electrodes,named AgNWs-PD and AgNWsPC,utilizing AgNWs as the conductive framework and aliphatic amine-functionalized perylene-diimide(PDINN)as the sandwiched material,while AgNWs-PC exhibits significantly improved electrical conductivity and enhanced contact area with the underlying electron transport layer.The optimized device achieves a power conversion efficiency of 9.45%with an open circuit voltage of 0.846 V,a high filling factor of 75.4%,and an average visible transmittance(AVT)of 44.0%,delivering an outstanding light utilization efficiency(LUE)of 4.16%,which is the highest reported value for all solution-processed ST-OPVs.In addition,by coupling a 30-nm tellurium dioxide atop AgNWs-PC,the bifaciality factor of derivative devices improves from 73.7%to 99.4%,while maintaining a high bifacial LUE over 3.7%.Our results emphasize the superiority and effectiveness of PDINN-sandwiched AgNWs electrodes for highperformance and all solution-processed ST-OPVs.
基金supported by the National Natural Science Foundation of China(No.52172056,62125406,62304226,52188101,62450124,and 62074150)the National Key Research and Development Program of China(2021YFA1200801)the Special Projects of the Central Government in Guidance of Local Science and Technology Development(2024010859-JH6/1006).
文摘Diamond,an ultrawide-bandgap semiconductor material,is promising for solar-blind ultraviolet photodetectors in extreme environments.However,when exposed to high-temperature conditions,diamond photodetector surfaces are unavoidably terminated with oxygen,leading to low photoresponsivity.To address this limitation,single-crystalline diamond nanowires(DNWs)embedded with platinum(Pt)nanoparticles were developed using Pt film deposition followed by chemical vapor deposition(CVD)homoepitaxial growth.During the CVD,Pt nanoparticles(approximately 20 nm in diameter)undergo dewetting and become uniformly embedded within the single-crystalline DNWs.Photodetectors fabricated with these Pt nanoparticles-embedded DNWs achieve a responsivity of 68.5 A W^(−1) under 220 nm illumination at room temperature,representing an improvement of approximately 2000 times compared to oxygen-terminated bulk diamond devices.Notably,the responsivity further increases with temperature,reaching an exceptional value of 3098.7 A W^(−1) at 275℃.This outstanding performance is attributed to the synergistic effects of the one-dimensional nanowire structure,deep-level defects,the localized surface plasmon resonance effects induced by embedded Pt nanoparticles,and localized Schottky junctions at the Pt/diamond interface,which enhance optical absorption,carrier generation,and separation efficiency.These results highlight the significant potential of Pt nanoparticles-embedded DNWs for advanced deep ultraviolet detection in harsh environments,including aerospace,industrial monitoring,and other applications.
基金supported by the National Natural Science Foundation of China(Grant No.12274076).
文摘Silicon carbide(core third-generation wide-bandgap semiconductor)nanowires have superior characteristics and vital engineering potential in microelectric and photonic devices operating in harsh high-temperature and strong-irradiation environments.Herein,the dense monocrystalline forest-like 4H-and 6H-SiC nanowires(intrinsically bound as a single crystal)are fabricated using the top–down peeling method.They exhibit broadband light emissions spanning the red–green–blue spectral region.The naturally formed microcavity encapsulating the SiC nanowires yields discrete and multimodal emission lines;the luminescence lifetimes decrease to the order of picoseconds owing to improved photon density of states in the microcavity by the quantum electrodynamic Purcell effect.The measured Purcell factor of 8.35 agrees well with the theoretical value of 8.6.The low-temperature luminescence and work functions show significant dependence on the nanowire polytype.The luminescence exhibits peculiar staircase-function enhancement when the temperature is elevated to 200 K,owing to suppression of nonradiative transition channels.
基金supported by the National Natural Science Foundation of China(Nos.51905103,52275177).
文摘Multifunctional flexible sensors as wearable electronic systems have attracted considerable attention for mimicking human skin to sense ambient stimuli.However,sensors need to have high resolution,stability and sensitivity to realize fully biomimetic skin.Here,an assembled and welded Ag/W composite nanowire flexible electrode was prepared for body motion monitoring and flexible heaters.This Ag/W composite nanowire flexible electrode has a high transmittance of 90.1%(at 121Ω·sq^(−1) sheet resistance)and a low sheet resistance of 27Ω·sq^(−1)(at 60.1%transmittance).Although the transparency of this electrode is not high,the fluctuation in relative resistance change rate at 10%strain is only 5%after 1000 tensile cycles.It can be employed to monitor human body motions,including bending of fingers,arms,wrists,and throat action.Meanwhile,the Ag/W nanowires composite film heater achieves a steady-state temperature of up to 100℃ at a constant voltage of 3.5 V and an instantaneous heating rate of up to 36.5℃·s^(−1).
基金supported by the National Research Foundation of Korea(NRF)Grant(RS-2024-00343512,RS-2024-00416938).
文摘Metallic nanowires have served as novel materials for soft electronics due to their outstanding mechanical compliance and electrical properties.However,weak adhesion and low mechanical robustness of nanowire networks to substrates significantly undermine their reliability,necessitating the use of an insulating protective layer,which greatly limits their utility.Herein,we present a versatile and generalized laser-based process that simultaneously achieves strong adhesion and mechanical robustness of nanowire networks on diverse substrates without the need for a protective layer.In this method,the laser-induced photothermal energy at the interface between the nanowire network and the substrate facilitates the interpenetration of the nanowire network and the polymer matrix,resulting in mechanical interlocking through percolation.This mechanism is broadly applicable across different metallic nanowires and thermoplastic substrates,significantly enhancing its universality in diverse applications.Thereby,we demonstrated the mechanical robustness of nanowires in reusable wearable physiological sensors on the skin without compromising the performance of the sensor.Furthermore,enhanced robustness and electrical conductivity by the laser-induced interlocking enables a stable functionalization of conducting polymers in a wet environment,broadening its application into various electrochemical devices.
基金supported by the National Key Research and Development Program from Ministry of Science and Technology(No.2023YFB3208102).
文摘Human vision,confined to visible wavelengths,represents a mere fraction of the electromagnetic spectrum exploited by other species.Pit vipers detect infrared radiation through specialized pit organs,integrating thermal and visual data to navigate darkness[1].Conventional retinal prosthetics,limited to visible light and requiring external power or injectable nanomaterials,fail to address this sensory deficit[2–5].
基金supported by the National Natural Science Foundation of China(Nos.52363004,51963003,and 52263003)Guizhou Provincial Science and Technology Projects(No.ZK[2022]Maj019).
文摘Exploiting high-performance absorption-dominant electromagnetic interference(EMI)shielding composites is urgently desired yet challenging for minimizing secondary electromagnetic radiation pollution.Herein,a nickel(Ni)shell was in-situ grown on a copper nanowires(CuNWs)core to greatly improve the stability of CuNWs,while maintaining excellent electrical conductivity.Afterward,Ni nanowires/Ni@Cu nanowires/graphite paper/waterborne polyurethane(NiNWs/Ni@CuNWs/graphite paper/WPU,n Ni-m Ni@Cu-G)composite foams with the multilayered gradient architectures were fabricated by a facile multi-step freeze-casting method.In the resultant composite foams,the lowly conductive porous NiNWs/WPU layer plays a role as the impedance matching layer,the moderately conductive porous Ni@CuNWs/WPU layer acts as the transition layer,and the highly conductive graphite paper layer serves as the reflection layer.Arising from the rational layout of multilayered gradient magnetic-electrical networks,n Ni-m Ni@Cu-G foam holds the superior averaged total EMI shielding effectiveness(EMI SET)of 75.2 dB and optimal absorption coefficient(A)of 0.93 at the incident direction from NiNWs/WPU layer,suggesting the dominant absorption in EMI shielding mechanism and efficiently alleviating the secondary electromagnetic pollution.Furthermore,n Ni-m Ni@Cu-G foam also exhibits fascinating compressive properties with a compressive strength of 49.3 kPa,which is essential for its practical application.This multilayered gradient architecture design provides valuable insight into high-efficiently constructing absorption-dominant EMI shielding composites.
基金supported by the Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China(No.2021ZR124)。
文摘Heteroatom doping is a promising strategy for designing cost-effective and stable electrocatalysts toward the oxygen evolution reaction(OER),but the enhancement mechanism remains unclear.Herein,atomic Ir-O-Cu and Ir-O-Ir motifs are engineered into CuO nanowires via cation exchange and dehydration to elucidate the OER mechanism.Systematic characterizations confirm the atomic dispersion of Ir within the CuO lattice and the electron transfer from Ir to CuO while preserving the host structure.The asprepared single-atom Ir-doped CuO(IrSA-CuO),featuring predominant Cu-O-Ir motifs and coexisting IrO-Ir motifs,achieves a low OER overpotential of 204 mV at 10 mA cm^(-2)in 1 M KOH,coupled with a 69-fold higher mass activity than commercial IrO_(2).Furthermore,the Ir_(SA)-CuO maintains long-term stability for 300 h at 200 mA cm^(-2)with minimal overpotential alteration and an additional 120 h at500 mA cm^(-2)with overpotential increased by 15 mV.In situ Raman spectroscopy reveals that the Ir-O-Ir motifs suppress Cu^(Ⅱ) oxidation to Cu^(Ⅲ) by delaying the onset potential,enhancing the structural stability during OER.Density functional theory calculations demonstrate the Cu-O-Ir motifs lower the adsorption energy of bridged ^(*)O via asymmetric bonding,accelerating ^(*)OOH formation in the ratedetermining step.This work presents a heteroatom engineering strategy to balance electrocatalytic activity and durability,providing a blueprint for industrial electrocatalyst design.
基金supported by the National Key Research and Development Program of China(2023YFB3610500)National Natural Science Foundation of China(62104110,62374094)+1 种基金the Project funded by China Postdoctoral Science Foundation(2023T160332)Natural Science Foundation of Nanjing University of Posts and Telecommunications(NY224084,NY224131).
文摘Low power consumption,high responsivity,and self-powering are key objectives for photoelectrochemical ultravio-let detectors.In this research,In-dopedα-Ga_(2)O_(3) nanowire arrays were fabricated on fluorine-doped tin oxide(FTO)substrates through a hydrothermal approach,with subsequent thermal annealing.These arrays were then used as photoanodes to con-struct a ultraviolet(UV)photodetector.In doping reduced the bandgap ofα-Ga_(2)O_(3),enhancing its absorption of UV light.Conse-quently,the In-dopedα-Ga_(2)O_(3) nanowire arrays exhibited excellent light detection performance.When irradiated by 255 nm deep ultraviolet light,they obtained a responsivity of 38.85 mA/W.Moreover,the detector's response and recovery times are 13 and 8 ms,respectively.The In-dopedα-Ga_(2)O_(3) nanowire arrays exhibit a responsivity that is about three-fold higher than the undoped one.Due to its superior responsivity,the In-doped device was used to develop a photoelectric imaging system.This study demonstrates that dopingα-Ga_(2)O_(3) nanowire with indium is a potent approach for optimizing their photoelectrochemi-cal performance,which also has significant potential for optoelectronic applications.
