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High-Quality InSb Grown on Semi-Insulting GaAs Substrates by Metalorganic Chemical Vapor Deposition for Hall Sensor Application

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Chinese Physics Letters 2019年第1期36卷 52-55页

作者： Xin Li Yu Zhao Min Xiong Qi-Hua Wu Yan Teng Xiu-Jun Hao Yong Huang Shuang-Yuan Hu Xin Zhu School of nano tech.ology and nano Bionics University of Science and Technology of China Key Laboratory of nanodevices and Applications Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences School of Physical Science and tech.ology Shanghai Tech University Suzhou Matrix Opto Co. Ltd

High-quality InSb epilayers are grown on semi-insulting GaAs substrates by metalorganic chemical vapor deposition using an indium pre-deposition tech.ique. The influence of Ⅴ/Ⅲ ratio and indium pre-deposition time on the surface morphology, crystalline quality and electrical properties of the InSb epilayer is systematically investigated using Nomarski microscopy, atomic force microscopy, high-resolution x-ray diffraction, Hall measurement and contactless sheet resistance measurement. It is found that a 2-μm-thick InSb epilayer grown at 450℃ with a Ⅴ/Ⅲ ratio of 5 and an indium pre-deposition time of 2.5s exhibits the optimum material quality, with a root-meansquare surface roughness of only 1.2 nm, an XRD rocking curve with full width at half maximum of 358 arcsec and a room-temperature electron mobility of 4.6 × 10~4 cm^2/V·s. These values are comparable with those grown by molecular beam epitaxy. Hall sensors are fabricated utilizing a 600-nm-thick InSb epilayer. The output Hall voltages of these sensors exceed 10 mV with the input voltage of 1 V at 9.3 mT and the electron mobility of 3.2 × 10~4 cm^2/V·s is determined, which indicates a strong potential for Hall applications.

关键词： Hall Sensor Application Metal organic chemical vapor deposition Gallium arsenide

Review—Lithium Carbon Composite Material for Practical Lithium Metal Batteries

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Chinese Journal of Chemistry 2023年第7期41卷 814-824页

作者： Lei Zheng Ruowei Yi Nan Zheng Yanbin Shen Liwei Chen School of nano-tech.and nano-Bionics University of Science and Technology of ChinaHefeiAnhui230026 China i-Lab CAS Center for Excellence in NanoscienceSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhouJiangsu215123 China in-situ Center for Physical Science School of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai200240 China

Comprehensive Summary Lithium(Li)metal is considered ideal for high-energy-density batteries due to its extremely high specific capacity and low electrochemical ***,uncontrolled Li dendrite growth and interfacial instability during repeated Li plating/stripping have limited the practical applicability of Li metal batteries(LMBs).Over the past decades,substantial efforts have been devoted to solving the challenges associated with Li metal *** research team has developed several Li-carbon(Li-C)microsphere composites in recent years to suppress the formation of Li dendrites and achieve a decent cycle *** this account,we summarize our advances in the design and application of Li-C composites,which include the developments in the structure and chemical composition of high-specific-capacity Li-C composites,strategies for surface passivation of the micro-spherical Li-C composites,and applications of the Li-C composite in next-generation high-energy-density Li-ion,Li-air,and solid-state ***,we discuss future perspectives for developing high-performance Li metal anodes and endeavors to realize the practical applications of LMBs.

关键词： Li anode High-energy-density Li metal batteries Li dendrites Li-carbon composite Artificial coating Interfaces Hierarchical nanostructures

surface-phonon-polariton-enhanced photoinduced dipole force for nanoscale infrared imaging

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National Science Review 2024年第5期11卷 227-235页

作者： Jian Li Junghoon Jahng Xuezhi Ma Jing Liang Xue Zhang Qianhao Min Xiao-Liang Wang Shuangjun Chen Eun Seong Lee Xing-Hua Xia State Key Lab of Analytical Chemistry for Life Science School of Chemistry and Chemical Engineering Nanjing University Hyperspectral nano-Imaging team Korea Research Institute of Standards and Science Institute of Materials Research and Engineering Agency for ScienceTechnology and Research College of Materials Science and Engineering Nanjing Tech University

The photoinduced dipole force(Pi DF) is an attractive force arising from the Coulombic interaction between the light-induced dipoles on the illuminated tip and the sample. It shows extreme sample-tip distance and refractive index dependence, which is promising for nanoscale infrared(IR) imaging of ultrathin samples. However, the existence of Pi DF in the mid-IR region has not been experimentally demonstrated due to the coexistence of photoinduced thermal force(Pi TF), typically one to two orders of magnitude higher than Pi DF. In this study, we demonstrate that, with the assistance of surface phonon polaritons, the Pi DF of c-quartz can be enhanced to surpass its Pi TF, enabling a clear observation of Pi DF spectra reflecting the properties of the real part of permittivity. Leveraging the detection of the Pi DF of phonon polaritonic substrate, we propose a strategy to enhance the sensitivity and contrast of photoinduced force responses in transmission images, facilitating the precise differentiation of the heterogeneous distribution of ultrathin samples.

关键词： surface phonon polariton photoinduced dipole force nanoscale infrared imaging ultrathin sample

Multi-site Passivation of ZnO Metal Oxides via Biomolecules for Efficient and Highly Stable Organic Solar Cells

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Chinese Journal of Chemistry 2024年第14期42卷 1582-1592页

作者： Irfan Ismail Maria Khalil Xiaomei Gao Xingze Chen Muhammad Jawad Rong Huang Zhiyun Li Emmanuel Acheampong Tsiwah Wei-shi Li Qun Luo Chang-Qi Ma i-Lab&Printable Electronics Research Center Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of Sciences(CAS)SuzhouJiangsu215123 China University of Chinese Academy of Sciences(UCAS) Beijing100040 China School of nano-tech.and nano-Bionics University of Science and Technology of China(USTC)HefeiAnhui230027 China Shanghai Institute of Organic Chemistry(SIOC) Chinese Academy of Sciences(CAS)Shanghai200032 China Vacuum Interconnected nanotech.Workstation(nano-X) SuzhouJiangsu215123 China

ZnO nanoparticles(nps)among metal oxide(MOs)are proven to be essential electron transporting layers(ETLs)applied in organic solar cells(OSCs).However,intrinsic defects,interfacial charge recombination,and catalytic behavior towards the active layer restrict the applications of ZnO nps for efficient and long-term stable *** commonly available biomolecule cytidine 5'-monophosphate(CMP-OH)with phosphonic acid,its salt cytidine 5'-monophosphate disodium salt(CMP-ONa)with a phosphate group as an anchoring group and conjugated terminal functional in both analogous molecules provide carrier transfer bridge at bottom interface of the active *** theoretical investigations and characterizations have discovered the multi-site coordination of CMP-OH towards acceptor molecules and ZnO *** dual-side alignment of CMP analogous molecules hinders interfacial charge recombination and enhances charge transfer potential at ***,PM6:L8-BO-based OSCs with modified ETL obtain 18.13%efficiency,12%higher than that of unmodified *** higher efficiency,CMP-OH-based OSC devices illustrate remarkably improved thermal stability for 500 h at 85℃with 72%of initial PCE and operation stability for 2000 h with 90.1%of initial *** work reveals the passivation mechanism of multi-anchoring groups towards MOs and single-functional groups towards the active layer to optimize the interface for efficient and highly stable OSCs.

关键词： Organic solar cells nanoparticles Nucleotides Interfacial interactions surface chemistry Multi-site passivation

Extracellular matrix and nitric oxide based functional coatings for vascular stents

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Engineered Regeneration 2022年第2期3卷 149-153页

作者： Quhan Cheng Muhammad Shafiq Muhammad Rafique Li Shen Xiumei Mo Kai Wang Key Laboratory of Bioactive Materials Ministry of EducationCollege of Life SciencesNankai UniversityTianjin 300071China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative MedicineCollege of ChemistryChemical Engineering and BiotechnologyDonghua UniversityShanghai 201620China Department of Cardiology Shanghai Institute of Cardiovascular DiseasesZhongshan HospitalFudan UniversityShanghai 200032China National Clinical Research Center for Interventional Medicine Shanghai 200032China.

Cardiovascular diseases cause huge morbidity and mortality ***,vascular stents have been most frequently used to treat.cardiovascular diseases thanks to their effectiveness at dilating blood vessels and main-taining the circulation of ***,stent expansion leads to endothelium injury posing thrombogenic and in-stent restenosis(ISR).In addition,the bioinertness and an acute lack of endothelium-like function on the surface of implanted vascular stents compromise their *** coatings of vascular stents to mimic endothelium-and extracellular matrix(ECM)-like functions could prevent thrombosis,inhibit the over-growth of smooth muscle cells(SMCs),and promote the rapid restoration of native endothelium,hence effec-tively suppressing stent-related ***,ECM-based coatings including a multitude of bioactive molecular,such as growth factors,heparin,hyaluronic acid(HA)and so on,have been proven to play important effects on regulating ECs/SMCs behavior and improving blood compatibility of ***,nitric oxide(NO),which is fundamental to the endothelium-mediated anti-thrombogenesity,anti-intimal hyperplasia and anti-inflammation,has been leveraged to improve vascular stent ***,this review will highlight different strategies and biological role of ECM and NO based functional coatings on vascular ***,some potential important factors for stents development are suggested as well.

关键词： Vascular stent Nitric oxide Extracellular matrix Functional coating

Building of lightweight Nb_(2)CT_(x) MXene@Co nitrogen-doped carbon nanosheet arrays@carbon fiber aerogels for high-efficiency electromagnetic wave absorption in X and Ku bands inspired by sea cucumber

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nano Research 2024年第11期17卷 9261-9274页

作者： Jiatong Yan Ce Cui Wenhao Bai Hong Tang Ronghui Guo College of Biomass Science and Engineering Sichuan University Chengdu 610065 China Yibin Industrial tech.ology Research Institute Sichuan University Yibin 644005 China High-tech.Organic Fibers Key Laboratory of Sichuan Province Chengdu 610041 China Aviation Key Laboratory of Science and tech.ology on Structural Corrosion Prevention and Control China Special Vehicle Research Institute Jingmen 448035 China Graduate School of Energy Science Kyoto University Kyoto City 606-8501 Japan

The problems of electromagnetic wave(EMW)pollution in X and Ku bands(8–18 GHz)are becoming more and more ***,it is urgent to design EMW absorbing materials with high-efficiency such as thin thickness,lightweight,wide bandwidth and strong EMW *** by the biomorph of sea cucumber,Nb_(2)CT_(x) MXene@Co nitrogen-doped carbon nanosheet arrays@carbon fiber aerogels(Nb_(2)CT_(x)@Co-NC@CFA,Nb_(2)CT_(x)=niobium carbide)were constructed by self-assembly,in-situ chemical deposition and subsequent *** carbon fiber aerogel,as the basic skeleton of sea cucumber,forms lightweight three-dimensional interconnected conductive network,enhances the dielectric loss and extends the multiple reflection and absorption paths of *** the tentacles of sea cucumber surface,Nb_(2)CT_(x) MXene and Co nitrogen-doped carbon nanosheet arrays exist rich heterogeneous interfaces,which play an important role in improving EMW polarization loss and optimizing impedance *** minimum reflection loss(RLmin)of Nb_(2)CT_(x)@Co-NC@CFA reaches−54.7 dB at 9.84 GHz(2.36 mm)with a low filling ratio of 10 wt.%and the effective absorption bandwidth(EAB)of Nb_(2)CT_(x)@Co-NC@CFA reaches 2.96 GHz(8.48–11.44 GHz)with 2.36 mm and 5.2 GHz(12.8–18 GHz)with 1.6 mm,covering most of X and Ku bands by adjusting *** radar cross section(RCS)value of Nb_(2)CT_(x)@Co-NC@CFA is 26.64 dB·m^(2),which is lower than that of the perfect electrical conductor(PEC),indicating that Nb_(2)CT_(x)@Co-NC@CFA can effectively decrease the probability of the target being detected by the radar *** work provides ideas for design and development of EMW absorbing materials with high-efficiency EMW absorption in X and Ku bands.

关键词： bionic sea cucumber Nb_(2)CT_(x)MXene Co nitrogen-doped carbon nanosheet arrays carbon fiber aerogel lightweight electromagnetic wave absorption

Boring holes in Au nanoplates by active surface etching

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nano Research 2024年第9期17卷 8610-8617页

作者： Haiyang Hu Yuntao Wang Qian Wang Xudong Peng An Su Hong Wang Hongyu Chen Institute of Advanced Synthesis(IAS)and School of Chemistry and Molecular Engineering Jiangsu National Synergetic Innovation Centre for Advanced MaterialsNanjing Tech UniversityNanjing 211816China Department of Environmental Science and Engineering University of Science and Technology of ChinaHefei 230026China Department of Chemistry School of Science and Key Laboratory for Quantum Materials of Zhejiang ProvinceResearch Center for Industries of the FutureWestlake UniversityHangzhou 310030China Institute of Natural Sciences Westlake Institute for Advanced StudyHangzhou 310024China

In contrast to the conventional etching that makes nanoparticles rounder and our previous sharpening etching mode that causes serrated edges,here,we developed a new boring etching mode that targets the faces of Au nanoplates to make *** critical factors are the pre-incubation step with the ligand 2-mercapto-5-benzimidazolecarboxylic acid(MBIA)and the subsequent removal of excess ligands in the ***,etching is focused onto the few sites with initial loss of ligands,which cannot be quickly *** choice of ligand MBIA is also of importance,as it carries negative charge and repels each *** inability of forming a dense layer probably plays a critical role in the site-selectivity for faces,because ligands at the higher curvature edges and corners are expected to have less *** etching results from the comproportionation reaction between Au3+and Au0 in the nanoplates,where Br-coordination to Au and the extra stabilization from cetyltrimethylammonium bromide(CTAB)are *** believe that the ability of boring holes is an important tool for future synthetic designs.

关键词： Au nanoplates active surface etching boring etching mode cetyltrimethylammonium bromide(CTAB)passivation holes

Integrated sensor based on acoustics-electricity-mechanics coupling effect for wireless passive gas detection

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nano Research 2023年第2期16卷 3130-3141页

作者： Licheng Zhou Bohui Zhai Zhixiang Hu Mingqi Zhang Long Li Xiangxin Wang Guangzu Zhang Jingting Luo Honglang Li Bingbing Chen Shenglin Jiang Hua-Yao Li Huan Liu School of Optical and Electronic Information Wuhan National Laboratory for OptoelectronicsOptics Valley LaboratoryHuazhong University of Science and TechnologyWuhan 430074China Shenzhen Huazhong University of Science and tech.ology Research Institute Shenzhen Virtual University ParkShenzhen 518000China Key Laboratory of Optoelectronic Devices and Systems College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China CAS Center for Excellence in nanoscience National Center for Nanoscience and TechnologyBeijing 100190China School of Energy Science and Engineering Nanjing Tech UniversityNanjing 211816China

Integrated sensor combines multiple sensor functions into a single unit,which has the advantages of miniaturization and better application ***,limited by the sensing platforms of the sensor and the selectivity of the sensitive film,there are still challenges to realize multi-component gas detection in one ***,a principle integration method is proposed to achieve the multi-component gas detection based on the acoustics-electricity-mechanics coupling *** electrical and mechanical properties of the Bi_(2)S_(3)nanobelts materials in different atmospheres indicate the possibility of realizing the principle *** the same time,the surface acoustic wave(SAW)sensor as a multivariable physical transducer can sense both electrical and mechanical *** exposure to 10 ppm NO_(2),NH_(3),and their mixtures,the integrated SAW gas sensor shows a 4.5 kHz positive frequency shift(acoustoelectric effect),an 11 kHz negative frequency shift(mechanics effects),and a reduced 4 kHz negative frequency shift(acoustics-electricity-mechanics coupling effect),***,we realize wireless passive detection of NO_(2)and NH_(3)based on the SAW *** work provides valuable insights that can serve as a guide to the design and fabrication of single sensors offering multi-component gas detection via different gas sensing mechanisms.

关键词： integrated gas sensor bismuth sulfide surface acoustic wave coupling effect wireless passive

Phase engineering of a donor-doped air electrode for reversible protonic ceramic electrochemical cells

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Advanced Powder Materials

Advanced Powder Materials 2024年第3期3卷 77-85页

作者： Kang Xu Hua Zhang Yangsen Xu Dongliang Liu Feng Zhu Fan He Ying Liu Haobing Wang Yu Chen School of Environment and Energy South China University of TechnologyGuangzhou 510006China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009China Research Institute of Renewable Energy and Advanced Materials Zijin Mining Group Co.Ltd.Xiamen 361101China South China Advanced Institute for Soft Matter Science and tech.ology School of Emergent Soft MatterGuangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and DevicesSouth China University of TechnologyGuangzhou 510640China

Reversible protonic ceramic electrochemical cells(R-PCECs)demonstrate great feasibility for efficient energy storage and *** critical challenge for the development of R-PCECs is the design of novel air electrodes with the characteristics of high catalytic activity and acceptable ***,we report a donor doping of Hf into the B-site of a cobalt-based double perovskite with a nominal formula of PrBa_(0.8)Ca_(0.2)Co_(1.9)Hf_(0.1)O_(5tδ)(PBCCHf_(0.1)),which is naturally reconfigured to a double perovskite PrBa_(0.8-x)Ca_(0.2)Co_(1.9)Hf_(0.1)-xO5tδ(PBCCHf_(0.1)-x)backbone and nano-sized BaHfO3(BHO)on the surface of PBCCHf_(0.1)*** air electrode demonstrates enhanced catalytic activity and durability(a stable polarization resistance of 0.269Ωcm2 for~100 h at 600℃),due likely to the fast surface exchange process and bulk diffusion *** employed as an air electrode of R-PCECs,a cell with PBCCHf_(0.1) air electrode demonstrates encouraging performances in modes of the fuel cell(FC)and electrolysis(EL)at 600℃:a peak power density of 0.998 W cm^(-2)and a current density of1.613 A cm^(-2)at 1.3 V(with acceptable Faradaic efficiencies).More importantly,the single-cell with PBCCHf_(0.1) air electrode demonstrates good cycling stability,switching back and forth from FC mode to EL mode0.5 A cm^(-2)for 200 h and 50 cycles.

关键词： Reversible protonic ceramic electrochemical cells Donor doping Air electrode In situ reconfiguration Phase engineering