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Nano Research 2019年第4期12卷 845-853页

作者： Xueyao Liu Wendong Liu Bai Yang State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun 130012 China Max Planck Institute for Polymer Research Acker mannweg 10 D-55128 Mainz Rheinland-Pfalz Germany

Elliptical metallic nanohole arrays possess much higher transmission and enhanced sensitivity compared with circular nanohole ***,fabricating elliptical metallic nanohole arrays in large area with highly tunable aspect ratio remains a ***,a brand-new method combining stretchable imprinting with colloidal lithography is figured out to fabricate deep-elliptical-silver-nanowell arrays (d-EAgNWAs).In this method,large area highly ordered silicon nanopillar arrays fabricated by colloidal lithography were taken as a master to transfer large area polydimethylsiloxane (PDMS) nanohole *** from the high elasticity of PDMS mold,the aspect ratio of d-EAgNWAs achieved can be facilely regulated from 1.7 to *** optimization of polarization direction and the structural parameters including nanowell depth,aspect ratio,and hole size,the sensing performance of d-EAgNWAs was finally improved up to 1,414.1 nm/*** best sensing behaved d-EAgNWAs were employed as an immunoassay platform finally to prove their great potential in label-free biosensing.

关键词： plasmonic sensor colloidal lithography nanohole deep-elliptical-silver-nanowell arrays stretchable imprinting

TiO_2 hierarchical pores/nanorod arrays composite film as photoanode for quantum dot-sensitized solar cells

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Journal of Energy Chemistry 2019年第3期28卷 1-7页

作者： Xing Du Lei Zhao Xuan He Hui Chen Weixin Li Wei Fang The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology

Power conversion efficiency(PCE) of quantum dot-sensitized solar cells(QDSSCs) was boosted in a TiO_2 composite film(TCSF) with delicate design in structure where TiO_2 hierarchical porous film(THPF) situated on the top of TiO_2 nanorod arrays film(TNAF). In this case, TNAF could supply efficient scattering centers for high light harvesting and direct electrical pathways for fast electron transfer while the THPF could offer porous channels for loading high quantity of previously synthetized quantum dots(QDs) and facilitate the penetration of electrolyte. Meanwhile, in this specific configuration, the presence of anatase–rutile heterojunction at the interface could help the rutile TNAF layer to efficiently collect photo-injected electrons from the anatase THPF layer thus suppressing the recombination of electrons and holes in electrolyte. The results showed that the PCE of QDSSC based on the TNAF photoanode was about 1.4-fold higher(η = 3.05%, J_(sc)= 15.86 m A cm^(-2), V_(oc)= 0.602 V, FF = 0.319) than that of device based on pure THPF(η = 2.20%, J_(sc)= 13.82 m A cm^(-2), V_(oc)= 0.572 V, FF = 0.278).

关键词： Hierarchical pores Nanorod arrays Composite photoanode Quantum dot-sensitized solar cells

High?Index?Faceted Ni_3S_2 Branch arrays as Bifunctional Electrocatalysts for Efficient Water Splitting

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Nano-Micro Letters 2019年第1期11卷 205-216页

作者： Shengjue Deng Kaili Zhang Dong Xie Yan Zhang Yongqi Zhang Yadong Wang Jianbo Wu Xiuli Wang Hong Jin Fan Xinhui Xia Jiangping Tu State Key Laboratory of Silicon Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and Department of Materials Science and Engineering Zhejiang University Guangdong Engineering and Technology Research Center for Advanced Nanomaterials School of Environment and Civil Engineering Dongguan University of Technology School of Physical and Mathematical Sciences Nanyang Technological University School of Engineering Nanyang Polytechnic Zhejiang Provincial Key Laboratory for Cutting Tools Taizhou University

For efficient electrolysis of water for hydrogen generation or other valueadded chemicals, it is highly relevant to develop low-temperature synthesis of low-cost and high-e ciency metal sulfide electrocatalysts on a large scale. Herein, we construct a new core–branch array and binder-free electrode by growing Ni_3S_2 nanoflake branches on an atomic-layer-deposited(ALD) TiO_2 skeleton. Through induced growth on the ALD-TiO_2 backbone, cross-linked Ni_3S_2 nanoflake branches with exposed { 210} highindex facets are uniformly anchored to the preformed TiO_2 core forming an integrated electrocatalyst. Such a core–branch array structure possesses large active surface area, uniform porous structure, and rich active sites of the exposed { 210 } high-index facet in the Ni_3S_2 nanoflake. Accordingly, the TiO_2@Ni_3S_2 core/branch arrays exhibit remarkable electrocatalytic activities in an alkaline medium, with lower overpotentials for both oxygen evolution reaction(220 mV at 10 mA cm^(-2)) and hydrogen evolution reaction(112 m V at 10 mA cm^(-2)), which are better than those of other Ni_3S_2 counterparts. Stable overall water splitting based on this bifunctional electrolyzer is also demonstrated.

关键词： Nickel sulfide Core/branch arrays Porous film Bifunctional electrocatalysts Electrochemical water splitting Oxygen evolution reaction(OER) Hydrogen evolution reaction(HER)

A biosensing system employing nanowell microelectrode arrays to record the intracellular potential of a single cardiomyocyte

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Microsystems & Nanoengineering 2022年第3期8卷 185-198页

作者： Yuting Xiang Haitao Liu Wenjian Yang Zhongyuan xu Yue Wu Zhajian Tang Zhjing Zhu Zhiyong Zeng Depeng Wang Tianxing Wang Ning Hu Diming Zhang Department of Obstetrics and Gynecology Affiliated Dongguan People's HospitalSouthern Medical UniversityDongguan 523058China Research Center for Inelligent Sensing Systems Zhejiang LaboratoryHangzhou 311100China Research Center for Humanoid Sensing Zhejiang LaboratoryHangzhou 311100China Key Laboratory of Novel Target and Drug Study for Neural Repair of Zhejiang Province School of MedicineSchool of Computer&Computing ScienceZhejiang University City CollegeHangzhou 310015China School of Brain Science and Brain Medicine Zhejiang UniversityHangzhou 310058China School of Automation Nanjing University of Science and TechnologyNanjing 210094China College of Energy and Power Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China E-Link Care Meditech Co. LtdHangzhou 310011China ZJU-Hangzhou Global Scientific and Technological Innovation Center Department of ChemitryZhejiang UniversityHangzhou 310058China

Electrophysiological recording is a widely used method to investigate cardiovascular pathology,pharmacology and developmental *** arrays record the electrical potential of cells in a minimally invasive and highthroughput ***,commonly used microelectrode arays primarily employ planar microelectrodes and cannot work in applications that require a recording of the intracellular action potential of a single *** this study,we proposed a novel measuring method that is able to record the intracellular action potential of a single cardiomyocyte by using a nanowell patterned microelectrode array(NWMEA).The NWMEA consists of five nanoscale wells at the center of each circular planar *** pulse electroporation was applied to the NWMEA to penetrate the cardiomyocyte membrane,and the intracellular action potential was continuously *** intracellular potential recording of cardiomyocytes by the NWMEA measured a potential signal with a higher quality(213.76±25.85%),reduced noise root-mean-square(~33%),and higher signal-to-noise ratio(254.36±12.61%)when compared to those of the extracellular *** to previously reported nanopillar microelectrodes,the NWMEA could ensure single cell electroporation and acquire high-quality action potential of cardiomyocytes with reduced fabrication *** NWMEA-based biosensing system is a promising tool to record the intracellular action potential of a single cell to broaden the usage of microelectrode arrays in electrophysiological investigation.

关键词： arrays potential record

Nanostructured ultrathin catalyst layer with ordered platinum nanotube arrays for polymer electrolyte membrane fuel cells

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Journal of Energy Chemistry 2020年第4期29卷 33-39页

作者： Ruoyi Deng Zhangxun Xia Ruili Sun Suli Wang Gongquan Sun Division of Fuel Cells and Battery Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China

Fabrication of novel electrode architectures with nanostructured ultrathin catalyst layers is an effective strategy to improve catalyst utilization and enhance mass transport for polymer electrolyte membrane fuel cells (PEMFCs).Herein,we report the design and construction of a nanostructured ultrathin catalyst layer with ordered Pt nanotube arrays,which were obtained by a hard-template strategy based on ZnO,via hydrothermal synthesis and magnetron sputtering for PEMFC *** of the crystallographically preferential growth of Pt (111) facets,which was attributed to the structural effects of ZnO nanoarrays on the Pt nanotubes,the catalyst layers exhibit obviously higher electrochemical activity with remarkable enhancement of specific activity and mass transport compared with the state-of-the-art randomly distributed Pt/C catalyst *** PEMFC fabricated with the as-prepared catalyst layer composed of optimized Pt nanotubes with an average diameter of 90(±10) nm shows excellent performance with a peak power density of 6.0W/mgPt at 1 A/cm^2,which is 11.6%greater than that of the conventional Pt/C electrode.

关键词： Catalyst layer Membrane electrode assembly Platinum nanotube arrays Fuel cells

Progress on AlGaN-based solar-blind ultraviolet photodetectors and focal plane arrays

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Light(Science & Applications) 2021年第6期10卷 976-1006页

作者： Qing Cai Haifan You Hui Guo Jin Wang Bin Liu Zili Xie Dunjun Chen Hai Lu Youdou Zheng Rong Zhang Key Laboratory of Advaneed Photonic and Electronic Materials School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China Collaborative In novation Center for Optoelectronic Semiconductors and Efficient Devices Department of PhysicsXiamen UniversityXiamen 361005China lnstitute of Future Display Tech no logy Tan Kah Kee Inno vati on LaboratoryXiamen 361102China

Solar-blind ultraviolet(UV)photodetectors(PDs)have attracted tremendous attention in the environmental,industrial,military,and biological *** a representative Ill-nitride material,AlGaN alloys have broad development prospects in the field of solar-blind detection due to their superior properties,such as tunable wide bandgaps for intrinsic UV *** recent decades,a variety of AlGaN-based PDs have been developed to achieve high-precision solar-blind UV *** integrated optoelectronic technology advances,AlGaN-based focal plane arrays(FPAs)are manufactured and exhibit outsta nding solar-blind imaging *** sidering the rapid development of AlGaN detection techniques,this paper comprehensively reviews the progress on AlGaN-based solar-blind UV PDs and ***,the basic physical properties of AlGaN are *** epitaxy and p-type doping problems of AlGaN alloys are then *** PDs,including photoconductors and Schottky,metal-semiconductor-metal(MSM),p-i-n,and avalanche photodiodes(APDs),are dem on strated,and the physical mechanisms are analyzed to improve device ***,this paper summarizes imaging technologies used with AlGaN FPAs in recent ***!ng from the development of AlGaN materials and optoelectronic devices,solar-blind UV detection technology is greeted with significant revolutions.

关键词： optoelectronic arrays ultraviolet

Controlled on-chip fabrication of large-scale perovskite single crystal arrays for high-performance laser and photodetector integration

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Light(Science & Applications) 2023年第4期12卷 558-569页

作者： Zhangsheng Xu Xun Han Wenqiang Wu Fangtao Li Ru Wang Hui Lu Qiuchun Lu Binghui Ge Ningyan Cheng Xiaoyi Li Guangjie Yao Hao Hong Kaihui Liu Caofeng Pan CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060China Colllege of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004China Information Materials and Intelligent Sensing Laboratory of Anhui Province Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationInstitutes of Physical Science and Information TechnologyAnhui UniversityHefei 230601China College of Materials Science and Engineering Ocean University of ChinaQingdao 266100China State Key Laboratory for Mesoscopic Physics Frontiers Science Centre for Nano-optoelectronicsSchool of PhysicsPeking UniversityBeijing 100871China Songshan Lake Materials Laboratory Dongguan 523808China

Metal halide perovskites possess intriguing optoelectronic properties,however,the lack of precise control of on-chip fabrication of the large-scale perovskite single crystal arrays restricts its application in integrated ***,we report a space confinement and antisolvent-assisted crystallization method for the homogeneous perovskite single crystal arrays spanning 100 square centimeter *** method enables precise control over the crystal arrays,including different array shapes and resolutions with less than 10%-pixel position variation,tunable pixel dimensions from 2 to 8 pm as well as the in-plane rotation of each *** crystal pixel could serve as a high-quality whispering gallery mode(WGM)microcavity with a quality factor of 2915 and a threshold of 4.14μJ cm^(-2).Through directly on-chip fabrication on the patterned electrodes,a vertical structured photodetector array is demonstrated with stable photoswitching behavior and the capability to image the input patterns,indicating the potential application in the integrated systems of this method.

关键词： arrays crystal precise

Tunable rainbow light trapping in ultrathin resonator arrays

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Light(Science & Applications) 2020年第1期9卷 113-121页

作者： Katelyn Dixon Arthur O.Montazeri Moein Shayegannia Edward S.Barnard Stefano Cabrini Naomi Matsuura Hoi-Ying Holman Nazir P.Kherani Department of Electrical&Computer Engineering University of TorontoTorontoOntario M5S 3G4Canada Lawrence Berkeley National Laboratory 1 Cyclotron Rd.BerkeleyCA 94720USA Department of Materials Science&Engineering University of TorontoTorontoOntario M5S 3G4Canada

Rainbow light trapping in plasmonic devices allows for field enhancement of multiple wavelengths within a single ***,many of these devices lack precise control over spatial and spectral enhancement profiles and cannot provide extremely high localised field *** we present a versatile,analytical design paradigm for rainbow trapping in nanogroove arrays by utilising both the groove-width and groove-length as tuning *** couple this design technique with fabrication through multilayer thin-film deposition and focused ion beam milling,which enables the realisation of unprecedented feature sizes down to 5 nm and corresponding extreme normalised local field enhancements up to *** demonstrate rainbow trapping within the devices through hyperspectral microscopy and show agreement between the experimental results and *** combination of expeditious design and precise fabrication underpins the implementation of these nanogroove arrays for manifold applications in sensing and nanoscale optics.

关键词： rainbow trapping arrays

Single-crystal TiO2/SrTiO3 core–shell heterostructured nanowire arrays for enhanced photoelectrochemical performance

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Rare Metals 2019年第5期38卷 369-378页

作者： Ying Chen Shi Li Ruo-Yu Zhao Wei Li Zhao-Hui Ren Gao-Rong Han State Key Laboratory of Silicon Materials School of Materials Science and Engineering Cyrus Tang Center for Sensor Materials and Application Zhejiang University

Vertically aligned TiO2/SrTiO3 core–shell heterostructured nanowire arrays with different shell thicknesses(5–40 nm)were fabricated on fluorine-doped tin oxide substrate via a hydrothermal *** characterization demonstrated that the TiO2 nanowires were uniformly coated by the singlecrystal SrTiO3 shell,where continuous and large-area interface could be clearly *** this means,significantly enhanced photoelectrochemical water splitting properties(0.78 mA·cm^-2 at 1.23 V ***)were successfully realized in well-designed sample(with a shell thickness of 5–10 nm)compared with those of pristine TiO2(0.38 mA·cm^-2 at 1.23 V ***).The improvement of photoelectrochemical properties was attributed to the improved charge injection and charge separation,which are calculated by the results of water oxidation and sulfite oxidation *** on these results,a mechanism was proposed that SrTiO3 shell acted as an electron–hole separation layer to improve the photocurrent *** the other hand,the sample with an over-thick SrTiO3 shell(20–40 nm)exhibited slightly reduced photoelectrochemical properties(0.66 mA·cm^-2),which could be explained by the increase of the recombination rate in thethicker SrTiO3 *** work provided a facile strategy to improve and modulate the photoelectrochemical performance of heterostructured photoanodes.

关键词： TiO2/SrTiO3 heterostructured nanowire arrays Photoelectrochemical water splitting Shell thickness Band alignment

Mechanically resilient,alumina-reinforced carbon nanotube arrays for in-plane shock absorption in micromechanical devices

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Microsystems & Nanoengineering 2023年第3期9卷 73-81页

作者： Eunhwan Jo Hojoon Lee Jae-Ik Lee Jongbaeg Kim School of Mechanical Engineering Yonsei University50 Yonsei-roSeodaemun-guSeoul 03722Republic of Korea Department of Neurosurgery Massachusetts General HospitalHarvard Medical School25 Shattuck StBostonMA 02115USA

Microelectromechanical systems(MEMS)are of considerable interest due to their compact size and low power consumption when used in modern *** devices intrinsically incorporate three-dimensional(3D)microstructures for their intended operations;however,these microstructures are easily broken by mechanical shocks accompanying high-magnitude transient acceleration,inducing device *** various structural designs and materials have been proposed to overcome this limit,developing a shock absorber for easy integration into existing MEMS structures that effectively dissipates impact energy remains ***,a vertically aligned 3D nanocomposite based on ceramic-reinforced carbon nanotube(CNT)arrays is presented for in-plane shock-absorbing and energy dissipation around MEMS *** geometrically aligned composite consists of regionally-selective integrated CNT arrays and a subsequent atomically thick alumina layer coating,which serve as structural and reinforcing materials,*** nanocomposite is integrated with the microstructure through a batch-fabrication process and remarkably improves the in-plane shock reliability of a designed movable structure over a wide acceleration range(0-12,000g).In addition,the enhanced shock reliability through the nanocomposite was experimentally verified through comparison with various control devices.

关键词： shock plane arrays