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Highly stretchable and sensitive strain sensor based on silver nanowires/carbon nanotubes on hair band for human motion detection

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Progress in Natural Science:Materials International 2021年第3期31卷 379-386页

作者： Yanqiang Cao Tiancheng Lai Furui Teng Chang Liu Aidong Li National Laboratory of Solid State microstructures Materials Science and Engineering Department College of Engineering and Applied Sciences Collaborative Innovation Center of Advanced Microstructures Nanjing University institute of micro-nano Photonic & beam steering School of Science Nanjing University of Science and Technology

In this work, a highly stretchable and sensitive strain sensor using silver nanowires(Ag NWs)/multi-walled carbon nanotubes(MWCNTs) on hair band is proposed. The fabrication process of such sensors enabled scalable and facile production with low cost by dipping hair band into Ag NWs/MWCNTs composites suspension. The sensing performance of the sensors was optimized by tuning the Ag NWs/MWCNTs mass ratio. The hair band based strain sensor with Ag NWs/MWCNTs mass ratio of 30 exhibited the best performance with high sensitivity of 416.0 and good stretchability up to 70%. Moreover, great repeatability and long-term stability could be achieved over 7500 cycles of stretch-release. This Ag NWs/MWCNTs-hair band sensor can be used for monitoring human motions and swallowing action.

关键词： Carbon nanotubes Silver nanowires Strain sensor Stretchable electronics Human motion detection

Characteristic modification by inserted metal layer and interface graphene layer in ZnO-based resistive switching structures

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Chinese Physics B 2018年第2期27卷 522-526页

作者：刘浩男索晓霞张林奥张端吴汉春赵宏康江兆潭李英兰王志 School of Physics Beijing Institute of Technology Elementary Educational College Beijing Key Laboratory for Nano-Photonics and Nano-Structure Capital Normal University

ZnO-based resistive switching device Ag/ZnO/TiN, and its modified structure Ag/ZnO/Zn/ZnO/TiN and Ag/graphene/ZnO/TiN, were prepared. The effects of inserted Zn layers in ZnO matrix and an interface graphene layer on resistive switching characteristics were studied. It is found that metal ions, oxygen vacancies, and interface are involved in the RS process. A thin inserted Zn layer can increase the resistance of HRS and enhance the resistance ratio. A graphene interface layer between ZnO layer and top electrode can block the carrier transport and enhance the resistance ratio to several times. The results suggest feasible routes to tailor the resistive switching performance of ZnO-based structure.

关键词： resistive switching ZnO graphene multilayer thin films

Ultra-broadband spatial light modulation with dual-resonance coupled epsilon-near-zero materials

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nano Research 2021年第8期14卷 2673-2680页

作者： Qin Chen Shichao Song Huacun Wang Li Liang Yajin Dong Long Wen institute of nanophotonics Jinan UniversityGuangzhou 511443China institute of photonics Technology Jinan UniversityGuangzhou 511443China Suzhou institute of nano-Tech and nano-Bionics Chinese Academy of SciencesSuzhou 215123China

It has been found that the dielectric constants of transparent conductive oxides(TCOs)can be adjusted in an extremely large range by tuning the carrier *** to the remarkable light confinement property of the epsilon-near-zero(ENZ)effect of TCOs,it has attracted extensive interests of light ***,the operation wavelength bandwidth is usually limited by optical resonance that is applied to enhance the light-TCOs *** this work,a dual-resonance light coupling scheme is proposed to expand the modulation depth-bandwidth product with almost one order-of-magnitude *** a metallic subwavelength grating structure with deep trenches backed by a ground plane,the ENZ mode can be coupled to both magnetic resonance and Fabry-Perot resonance respectively by tuning the *** light modulation can be obtained in a large operation wavelength band covering two resonances by optimizing the dual-resonance *** a reconfigurable efficient broadband modulation is important for robust communication link and possesses remarkable capacity for wavelength division multiplexing.

关键词： epsilon-near-zero spatial light modulation plasmonics transparent conductive oxides field effect

Research progress of femtosecond surface plasmon polariton

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Chinese Physics B 2020年第2期29卷 10-30页

作者： Yulong Wang Bo Zhao Changjun Min Yuquan Zhang Jianjun Yang Chunlei Guo Xiaocong Yuan nano photonics Research Centre Shenzhen Key Laboratory of Micro-Scale Optical Information TechnologyShenzhen UniversityShenzhen 518060China The Guo China–US photonics Laboratory State Key Laboratory of Applied OpticsChangchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China

As the combination of surface plasmon polariton and femtosecond laser pulse,femtosecond surface plasmon polariton has both nanoscale spatial resolution and femtosecond temporal resolution,and thus provides promising methods for light field manipulation and light-matter interaction in extreme small spatiotemporal ***,the research on femtosecond surface plasmon polariton is mainly concentrated on two aspects:one is investigation and characterization of excitation,propagation,and dispersion properties of femtosecond surface plasmon polariton in different structures or materials;the other one is developing new applications based on its unique properties in the fields of nonlinear enhancement,pulse shaping,spatiotemporal super-resolved imaging,and ***,we introduce the research progress of properties and applications of femtosecond surface plasmon polariton,and prospect its future research *** the further development of femtosecond surface plasmon polariton research,it will have a profound impact on nano-optoelectronics,molecular dynamics,biomedicine and other fields.

关键词： surface plasmon polariton femtosecond laser pulse spatiotemporal super-resolution nonlinear optics

Atomic Layer Deposition of High-Capacity Anodes for Next-Generation Lithium-Ion Batteries and Beyond

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Energy & Environmental Materials 2021年第3期4卷 363-391页

作者： Yanqiang Cao Xiangbo Meng Aidong Li institute of micro-nano Photonic&beam steering School of ScienceNanjing University of Science and TechnologyNanjing 210094China Department of Mechanical Engineering Center for Advanced Surface EngineeringUniversity of ArkansasFayetteville AR 72701USA Materials Science and Engineering Department National Laboratory of Solid State MicrostructuresCollege of Engineering and Applied SciencesCollaborative Innovation Center of Advanced MicrostructuresJiangsu Key Laboratory of Artificial Functional MaterialsNanjing UniversityNanjing 210093China

Electrification has great impacts on our modern *** electrify future transportation,state-of-the-art lithium-ion batteries(LIBs)are still not sufficient in multiple aspects including cost,energy density,lifespan,and *** this end,next-generation high-energy LIBs and beyond are highly *** this regard,high-capacity anodes are undergoing intensive investigation,such as silicon,SnO_(2),and lithium ***,such anode materials are commonly experiencing large volume changes and related issues,which are reflected on mechanical degradation,capacity fading,low efficiency,and unsatisfactory *** address these challenges,many technical strategies have been *** the past decade,atomic layer deposition(ALD)has emerged as a new promising technique enabling atomic-scale surface modification and nanoscale design of high-capacity anodes for high *** this review,recent ALD studies on developing high-capacity anodes for LIBs and beyond are thoroughly *** addition,ALD strategies and their effectiveness in pursing high-energy LIBs and beyond are ***,we highlighted the latest advances of ALD for addressing the notorious issues associated with Li metal *** is expected that this work will promote the applications of ALD in new battery systems.

关键词： atomic layer deposition high-capacity anodes lithium-ion batteries and beyond nanostructured electrodes surface coating

Arbitrary polarization conversion dichroism metasurfaces for all-in-one full Poincare sphere polarizers

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Light(Science & Applications) 2021年第2期10卷 208-216页

作者： Shuai Wang Zi-Lan Deng Yujie Wang Qingbin Zhou Xiaolei Wang Yaoyu Cao Bai-Ou Guan Shumin Xiao Xiangping Li Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics TechnologyJinan University510632 GuangzhouChina Ministry of Industry and Information Technology Key Lab of micro-nano Optoelectronic Information System Harbin Institute of Technology518055 ShenzhenChina institute of Modern Optics Nankai University300350 TianjinChina

The control of polarization,an essential property of light,is of broad scientific and technological *** are indispensable optical elements for direct polarization ***,arbitrary polarization generation,except that of common linear and circular polarization,relies heavily on bulky optical components such as cascading linear polarizers and ***,we present an effective strategy for designing all-in-one full Poincare sphere polarizers based on perfect arbitrary polarization conversion dichroism and implement it in a monolayer all-dielectric *** strategy allows preferential transmission and conversion of one polarization state located at an arbitrary position on the Poincare sphere to its handedness-flipped state while completely blocking its orthogonal *** contrast to previous methods that were limited to only linear or circular polarization,our method manifests perfect dichroism of nearly 100%in theory and greater than 90%experimentally for arbitrary polarization *** leveraging this attractive dichroism,our demonstration of the generation of polarization beams located at an arbitrary position on a Poincare sphere directly from unpolarized light can substantially extend the scope of meta-optics and dramatically promote state-of-the-art nanophotonic devices.

关键词： surface. Poincare arbitrary

Back-illuminated Al_xGa_(1-x)N-based dual-band solar-blind ultraviolet photodetectors

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Journal of Semiconductors 2014年第6期35卷 58-61页

作者：杨敏种明赵德刚王晓勇苏艳梅孙捷孙秀艳 nano-photonics Laboratory Institute of SemiconductorsChinese Academy of Sciences State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of Sciences

： Back-illuminated AlxGal-xN-based dual-band solar-blind ultraviolet （UV） photodetectors （PDs） are realized by a three-terminal n-i-p-i-n heterojunction structure which is grown on sapphire substrate by metal organic chemical vapor deposition （MOCVD）. The two p-i-n junctions contained in the heterojunction structure can work separately and independently. Working in the photovoltaic mode, the PDs display peak responsivity of ～10.8 mA/W at 242 nm and ～5.0 mA/W at 257 nm, respectively. The two junctions with different size, whose diameters are 500 μm and 800 μm, exhibit almost the same leakage current of ～1.3× 10-9 A at a reverse bias of 10 V. Therefore, dark current densities of the two junctions are close to 6.6 × 10-7 A/cm2 and 2.6 × 10-7 A/cm2 at -10 V respectively.

关键词： solar-blind ultraviolet photodetectors dual-band n-i-p-i-n heterojunction

Triboelectric nanogenerator integrated with a simple controlled switch for regularized water wave energy harvesting

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nano Research 2024年第8期17卷 7585-7592页

作者： Hongbo Yang Xi Liang Junwu Kan Zhong Lin Wang Tao Jiang Zhanyong Hong College of Engineering Zhejiang Normal UniversityJinhua 321004China Beijing Key Laboratory of micro-nano Energy and Sensor Center for High-Entropy Energy and SystemsBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China The Beijing Key Laboratory for nano-photonics and nano-Structure Department of PhysicsCapital Normal UniversityBeijing 100048China Guangzhou institute of Blue Energy Guangzhou 510555China Georgia institute of Technology AtlantaGA 30332-0245USA Yonsei Frontier Lab Yonsei UniversitySeoul 03722Republic of Korea

Ocean is full of low-frequency,irregular,and widely distributed wave energy,which is suitable as the energy source for maritime Internet of Things(IoTs).Utilizing triboelectric nanogenerators(TENGs)to harvest ocean wave energy and power sensors is proven to be an effective ***,in random ocean waves,the irregular electrical energy output by general TENGs restricts the *** present,achieving regularized water wave energy harvesting relies on rather complex mechanical structure designs,which is not conducive to *** this work,we proposed a novel mechanical controlled TENG(MCTENG)with a simple controlled switch to realize the regularization *** structural parameters of the MC-TENG are optimized,and the optimal output voltage,output current,and transferred charge respectively reach 1684.2 V,85.4μA,and 389.9 nC,generating a peak power density of 38.46 W·m^(−3)·Hz^(−1).Under real water wave environment,the output of the MC-TENG is regularized and keeps stable regardless of any wave ***,the potential applications of the MC-TENG are demonstrated in powering environmental temperature,humidity,and wind speed *** work renders a simple approach to achieve effective regularized ocean wave energy harvesting,promoting the TENG industrialization toward practical application of maritime IoTs.

关键词： water wave energy harvesting triboelectric nanogenerators random excitation mechanical control regular output

Hunting down the ohmic contact of organic field-effect transistor

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Chinese Physics B 2019年第11期28卷 382-387页

作者： M Micjan M Novota P Telek M Donoval M Weis institute of Electronics and photonics Slovak University of Technology

We report properties of contact resistances observed on pentacene organic field-effect transistors(OFET) with four different source/drain electrodes, namely, copper(Cu), gold(Au), silver(Ag), and germanium(Ge). The metals were selected to provide a wide range of energy barriers for charge injection, from blocking contact to smooth injection. All OFETs exhibited strong voltage dependence of the contact resistance, even for devices with smooth injection, which is in strong disagreement with the definition of ohmic contacts. A comparison with current crowding, resistive network, Fowler–Nordheim tunneling, and electric field enhanced thermionic injection(Schottky emission) pointed to importance of local electric fields and/or electrostatic field charges.

关键词： organic field-effect transistors contact resistance charge injection