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High-Efficiency Photo-Induced Charge Transfer for SERS Sensing in N-Doped 3D-Graphene on Si Heterojunction

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Energy & Environmental Materials 2024年第02期7卷 272-280页

作者： Guanglin Zhang Jie Sun Genwang Wei Shan Zhang Zhengyi He Huijuan Wu Bingkun Wang Siwei Yang Guqiao Ding Zhiduo Liu Zhiwen Jin Caichao Ye Gang Wang Department of Microelectronic science and Engineering School of Physical Science and Technology Ningbo University Department of Biochemistry and Molecular Biology School of Basic Medical Sciences Shenzhen University Academy for Advanced Interdisciplinary Studies & Department of Materials science and Engineering Guangdong Provincial Key Laboratory of Computational Science and Material Design Southern University of Science and Technology State key laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE) School of Physics Beijing Institute of Technology School of Physical science and Technology & key laboratory for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou University

Nitrogen-doped three-dimensional graphene（N-doped 3D-graphene） is a graphene derivative with excellent adsorption capacity, large specific surface area, high porosity, and optoelectronic properties. Herein, N-doped 3Dgraphene/Si heterojunctions were grown in situ directly on silicon（Si）substrates via plasma-assisted chemical vapor deposition（PACVD）, which is promising for surface-enhanced Raman scattering（SERS） substrates candidates. Combined analyses of theoretical simulation, incorporating N atoms in 3D-graphene are beneficial to increase the electronic state density of the system and enhance the charge transfer between the substrate and the target molecules. The enhancement of the optical and electric fields benefits from the stronger light-matter interaction improved by the natural nano-resonator structure of N-doped 3D-graphene. The as-prepared SERS substrates based on N-doped 3D-graphene/Si heterojunctions achieve ultralow detection for various molecules: 10-8M for methylene blue（MB） and10-9M for crystal violet（CRV） with rhodamine（R6G） of 10-10M. In practical detected, 10-8M thiram was precisely detected in apple peel extract. The results indicate that N-doped 3D-graphene/Si heterojunctions based-SERS substrates have promising applications in low-concentration molecular detection and food safety.

关键词： charge transfer DFT simulation N-doped 3D-graphene SERS Thiram detection

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Efficient wide-bandgap perovskite solar cells with open-circuit voltage deficit below 0.4 V via hole-selective interface engineering

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science China Chemistry 2024年第6期67卷 2102-2110页

作者： Xiaoyu Ji Shuo Zhang Furong Yu Huidong Zhang Liqing Zhan Yue Hu Wei-Hong Zhu Yongzhen Wu key laboratory for Advanced Materials and Joint International Research laboratory of Precision Chemistry and Molecular Engineering Shanghai Key Laboratory of Functional Materials ChemistryFrontiers Science Center for Materiobiology and Dynamic ChemistryInstitute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China School of Chemistry University of EdinburghKing’s BuildingsEdinburghEH93FJUK

Wide-bandgap mixed-halide perovskite solar cells(WBG-PSCs)are promising top cells for efficient tandem photovoltaics to achieve high power conversion efficiency(PCE)at low ***,the open-circuit voltage(V_(OC))of WBG-PSCs is still unsatisfactory as the V_(OC)-deficit is generally larger than 0.45 ***,we report a buried interface engineering strategy that substantially improves the V_(OC)of WBG-PSCs by inserting amphiphilic molecular hole-selective materials featuring with a cyanovinyl phosphonic acid(CPA)anchoring group between the perovskite and *** assembly and redistribution of CPA-based amphiphilic molecules at the perovskite-substrate buried interface not only promotes the growth of a low-defect crystalline perovskite thin film,but also suppresses the photo-induced halide phase *** energy level alignment between wide-bandgap perovskite and the hole-selective layer is further improved by modulating the substituents on the triphenylamine donor moiety(methoxyls for MPA-CPA,methyls for Me PA-CPA,and bare TPA-CPA).Using a 1.68 e V bandgap perovskite,the Me PA-CPA-based devices achieved an unprecedentedly high V_(OC)of 1.29 V and PCE of 22.3%under standard AM 1.5 *** V_(OC)-deficit(<0.40 V)is the lowest value reported for *** work not only provides an effective approach to decreasing the V_(OC)-deficit of WBG-PSCs,but also confirms the importance of energy level alignment at the charge-selective layers in PSCs.

关键词： cyanovinyl phosphonic acid energy level alignment hole-selective material open-circuit voltage wide-bandgap perovskite

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Double-kill contribution of high-roughness high-density porous carbon electrodes to mechanically self-sensing supercapacitors

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Nano Research 2024年第7期17卷 6157-6167页

作者： Jue Huang Pengyu Liu Yiqun Wang Keren Dai Qingyun Dou Yajiang Yin Xiaofeng Wang Zheng You Department of Precision Instrument Tsinghua UniversityBeijing 100084China State key laboratory of Precision measurement Technology and Instruments Beijing 100084China Department of Materials science and Engineering Sun Yat-Sen UniversityGuangzhou 510275China ZNDY of Ministerial key laboratory School of Mechanical EngineeringNanjing University of Science and TechnologyNanjing 210094China Qiyuan laboratory Beijing 100095China

Impact detecting and counting are fundamental functions of fuses used in hard target penetration ***,detection failure caused by battery breakdown in high-g acceleration environments poses a vulnerability for such *** paper introduces a novel supercapacitor that combines energy storage and high-g impact detection,called self-sensing *** deliberately inducing a transient soft short-circuit during shock in the supercapacitor,it is possible to detect external impact by its transient voltage *** realize this concept,firstly,by introducing the contact theory and force-induced percolation model,the electrode strength and roughness are found to have key impacts on the formation of soft ***,to meet the needs for sensitivity and capacity,a high-density porous carbon(HDPC)that combines high mechanical strength and porosity,is selected as a suitable candidate based on the analysis ***,a two-step curing method is proposed to prepare the high-roughness HDPC(HRHDPC)electrode and to assemble the self-sensing *** to the rich specific surface of the electrodes and the high surface strength and roughness conducive to the formation of transient soft short circuits,the self-sensing supercapacitor not only possesses an excellent specific capacitance(171 F/g at 0.5 A/g)but also generates significant voltage response signals when subjected to high-g impacts ranging from 8000g to 31,***,the self-sensing supercapacitor is applied to compose a successive high-g impact counting system and compared to traditional solutions(sensors and tantalum capacitors)in the military *** results show that the self-sensing supercapacitor-based system exhibits advantages in terms of size,power consumption,and counting accuracy.

关键词： supercapacitor self-sensing soft short-circuit impact sensing

Electric tuning of plasmonic resonances in ultrathin gold nanoribbon arrays

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Photonics Research 2024年第08期12卷 1750-1759页

作者： ZHENXIN WANG ALEXEY V.KRASAVIN CHENXINYU PAN JUNSHENG ZHENG ZHIYONG LI XIN GUO ANATOLY V.ZAYATS LIMIN TONG PAN WANG State key laboratory of Extreme Photonics and instrumentation College of Optical Science and Engineering Zhejiang University Department of Physics and London Centre for Nanotechnology King's College London Jiaxing key laboratory of Photonic Sensing & Intelligent Imaging Intelligent Optics & Photonics Research Center Jiaxing Research Institute Zhejiang University

Ultrathin plasmonic nanostructures offer an unparalleled opportunity for the study of light–matter interactions at the nanoscale and realization of compact nanophotonic devices. In this study, we introduce an ultrathin gold nanoribbon array and demonstrate an electric approach to actively tuning its plasmonic resonance, which leveraging the extreme light confinement capability in the ultrathin plasmonic nanostructure and a robust nanoscale electro-optical effect in indium tin oxide. Optimizing the design(to a total thickness as small as 12 nm for a 2-nmthick gold nanoribbon array), we numerically demonstrate a spectral shift in the plasmonic resonance up to 36 nm along with an approximately 16% change in the transmission at a gate voltage below 1.7 V at the wavelength of1.47 μm. This work presents progress towards electric tuning of plasmonic resonances in ultrathin metallic nanostructures for various applications including surface-enhanced spectroscopy, spontaneous emission enhancement,and optical modulation.

关键词： Chemical sensors Diffraction limit Electrooptical effects Indium tin oxide Light matter interactions Nanostructures

Solar manipulations of perpendicular magnetic anisotropy for flexible spintronics

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Frontiers of physics 2024年第4期19卷 73-79页

作者： Zhexi He Yifan Zhao Yujing Du Meng Zhao Yuxuan Jiang Ming Liu Ziyao Zhou State key laboratory for Manufacturing Systems Engineering Electronic Materials Research LaboratoryKey Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic Science and EngineeringThe International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologyXi’an Jiaotong UniversityXi’an 710049China School of Materials science&Engineering Changzhou UniversityChangzhou 213164China

Flexible electronics/spintronics attracts researchers’attention for their application potential abroad in wearable devices,healthcare,and other *** devices’performance(speed,energy consumption)is highly dependent on manipulating information bits(spin-orientation in flexible spintronics).In this work,we established an organic photovoltaic(OPV)/ZnO/Pt/Co/Pt heterostructure on flexible PET substrates with perpendicular magnetic anisotropy(PMA).Under sunlight illumination,the photoelectrons generated from the OPV layer transfer into the PMA heterostructure,then they reduce the PMA strength by enhancing the interfacial Rashba field *** coercive field(Hc)reduces from 800 Oe to 500 Oe at its maximum,and the magnetization can be switched up and down *** stability of sunlight control of magnetization reversal under various bending conditions is also tested for flexible spintronic ***,the voltage output of sunlight-driven PMA is achieved in our prototype device,exhibiting an excellent angular dependence and opening a door towards solar-driven flexible spintronics with much lower energy consumption.

关键词： interfacial magnetoelectric coupling perpendicular magnetic anisotropy deterministic magnetization reversal photovoltaic control of magnetism

Optical micro/nanofiber enabled tactile sensors and soft actuators:A review

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Opto-Electronic science 2024年第8期3卷 13-29页

作者： Lei Zhang Yuqi Zhen Limin Tong State key laboratory of Extreme Photonics and instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China

As a combination of fiber optics and nanotechnology,optical micro/nanofiber(MNF)is considered as an important multifunctional building block for fabricating various miniaturized photonic *** the rapid progress in flexible optoelectronics,MNF has been emerging as a promising candidate for assembling tactile sensors and soft actuators owing to its unique optical and mechanical *** review discusses the advances in MNF enabled tactile sensors and soft actuators,specifically,focusing on the latest research results over the past 5 years and the applications in health monitoring,human-machine interfaces,and *** prospects and challenges in developing flexible MNF devices are also presented.

关键词： flexible opto-electronic devices tactile sensors soft actuators optical micro/nanofibers

Hybrid electromechanical properties of hetero-doped and homogeneously bonded dual-mode pressure sensor for indoor body area network node

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science China(Information sciences) 2024年第1期67卷 240-253页

作者： Junbin YU Shuai XIAN Jinbiao MU Min WANG Yin WANG Xiaojuan HOU Le ZHANG Jian HE Jiliang MU Xiujian CHOU science and Technology on Electronic Test and measurement laboratory North University of China Sichuan Aerospace Fenghuo Servo Control Technology Corporation

Pressure sensors are considerably important for continuous monitoring of human movement and the surrounding environment to construct a caregiving system for the elderly living *** challenge for pressure sensors that still remains is combining self-driven,comfort,and ***,an all-in-one conformal pressure sensor(ACPS) based on a homogeneous integrated triboelectric-piezoelectric hybrid sensor is *** ACPS has dual-mode sensing properties due to coupling triboelectrification and piezoelectric effect ensuring a stable response to various external ***-coated glass microspheres and polyacrylonitrile were uniformly filleted into the silicone rubber substrate using a hetero-doping method to create a stretchable electrode layer with flexible conformal characteristics and a piezoelectric layer with excellent piezoelectric properties,***,the triboelectric layer was fabricated using the same silicone rubber,allowing ACPS to be homogeneously bonded into an all-in-one structure with reliable *** allowed various functional layers to have outstanding interface characteristics and thus improve the electrical transmission *** developed ACPS had outstanding sensitivity(1.04 V/104Pa),high linearity(about 0.984),a wide measurement range(10–700 k Pa),and can accurately and continuously distinguish multiple ***,using a homemade signal processing circuit,ACPSs can be deployed in the human body and the room as indoor body area network *** successfully applied to the remote tracking of daily dynamic home life and the remote operation of small electrical equipment,these ACPSs can achieve real-time caregiving for the elderly living *** an application area desperately needed by society,this study envisions a caregiving system for the elderly living alone without violating personal privacy.

关键词： dual-mode pressure sensor homogeneous bonding all-in-onestructure indoor body area network node elderly caregiving microsystem

Plasma-assisted ammonia synthesis under mild conditions for hydrogen and electricity storage:Mechanisms,pathways,and application prospects

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Frontiers in Energy 2024年第4期18卷 418-435页

作者： Feng GONG Yuhang JING Rui XIAO key laboratory of Energy Thermal Conversion and Process measurement and Control of the Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096China

Ammonia,with its high hydrogen storage density of 17.7 wt.%(mass fraction),cleanliness,efficiency,and renewability,presents itself as a promising zero-carbon ***,the traditional Haber−Bosch(H−B)process for ammonia synthesis necessitates high temperature and pressure,resulting in over 420 million tons of carbon dioxide emissions annually,and relies on fossil fuel *** contrast,dielectric barrier discharge(DBD)plasma-assisted ammonia synthesis operates at low temperatures and atmospheric pressures,utilizing nitrogen and hydrogen radicals excited by energetic electrons,offering a potential alternative to the H−B *** method can be effectively coupled with renewable energy sources(such as solar and wind)for environmentally friendly,distributed,and efficient ammonia *** review delves into a comprehensive analysis of the low-temperature DBD plasma-assisted ammonia synthesis technology at atmospheric pressure,covering the reaction pathway,mechanism,and catalyst system involved in plasma nitrogen *** from current research,it evaluates the economic feasibility of the DBD plasmaassisted ammonia synthesis technology,analyzes existing dilemmas and challenges,and provides insights and recommendations for the future of nonthermal plasma ammonia processes.

关键词： plasma catalysis nitrogen fixation ammonia synthesis hydrogen storage catalyst carbon neutralization

The origins of catalytic selectivity for the electrochemical conversion of carbon dioxide to methanol

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Nano Research 2024年第1期17卷 5-17页

作者： Tian Wang Yating Wang Yuhang Li Chunzhong Li key laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Materials Science and EngineeringEast China University of Science&TechnologyShanghai 200237China School of Chemical Engineering East China University of Science&TechnologyShanghai 200237China

The electrocatalytic conversion of carbon dioxide(CO_(2))into useful fuels and chemical feedstocks is an emerging route to alleviate global warming and reduce reliance on fossil ***(CH_(3)OH),as one of the most significant and widely used liquid fuels that can be generated by CO_(2)reduction,is essential in the chemical *** this minireview,we unravel the origins of the selective formation of CH_(3)OH via CO_(2)reduction,including catalyst composition designs,local structure modulations,and electrolyte/catalyst interface ***,the remaining challenges and perspectives for the CO_(2)-to-CH_(3)OH reduction are proposed.

关键词： methanol carbon dioxide(CO_(2))reduction reaction electrochemistry electrocatalyst catalyst-electrolyte interface