检索结果-南通市图书馆

nanowire-supported plasmonic waveguide for remote excitation of surface-enhanced Raman scattering

Light(Science & Applications) 2014年第1期3卷 106-122页

作者： Yingzhou Huang Yurui Fang Zhenglong Zhang Ling Zhu Mengtao Sun Soft Matter and Interdisciplinary Research Center College of PhysicsChongqing UniversityChongqing 400044China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Division of Bionanophotonics Department of Applied PhysicsChalmers University of TechnologyGoteborg 41296Sweden Leibniz Institute of Photonic Technology 07745 JenaGermany Physical Chemistry Friedrich-Schiller University Jena07743 JenaGermany National Center for Nanoscience and Technology Beijing 100190China

Due to its amazing ability to manipulate light at the nanoscale,plasmonics has become one of the most interesting topics in the field of light–matter *** a promising application of plasmonics,surface-enhanced Raman scattering(SERS)has been widely used in scientific investigations and material *** large enhanced Raman signals are mainly caused by the extremely enhanced electromagnetic field that results from localized surface plasmon ***,a novel SERS technology called remote SERS has been reported,combining both localized surface plasmon polaritons and propagating surface plasmon polaritons(PSPPs,or called plasmonic waveguide),which may be found in prominent applications in special circumstances compared to traditional local *** this article,we review the mechanism of remote SERS and its development since it was first reported in *** remote metal systems based on plasmonic waveguides,such as nanoparticle–nanowire systems,single nanowire systems,crossed nanowire systems and nanowire dimer systems,are introduced,and recent novel applications,such as sensors,plasmon-driven surface-catalyzed reactions and Raman optical activity,are also ***,studies of remote SERS in dielectric and organic systems based on dielectric waveguides remind us that this useful technology has additional,tremendous application prospects that have not been realized in metal systems.

关键词： nanowire plasmonic waveguide remote-excitation surface-enhanced Raman scattering

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High resolution strain mapping of a single axially heterostructured nanowire using scanning X-ray diffraction

引用

Nano Research 2020年第9期13卷 2460-2468页

作者： Susanna Hammarberg Vilgaile Dagyte Lert Chayanun Megan O.Hill Alexander Wyke Alexander Bjorling Ulf Johansson Sebastian Kalbfleisch Magnus Heurlin Lincoln J.Lauhon Magnus T.Borgstrom Jesper Wallentin Synchrotron Radiation Research and NanoLund Lund UniversityBox 118Lund 22100Sweden Solid State Physics and NanoLund Lund UniversityBox 118Lund 22100Sweden Department of Materials Science and Engineering Northwestern UniversityEvanstonIllinois 60208USA MAX IV Laboratory Lund UniversityBox 118Lund 22100Sweden

Axially heterostructured nanowires are a promising platform for next generation electronic and optoelectronic *** based on theoretical modeling have predicted more complex strain distributions and increased critical layer thicknesses than in thin films,due to lateral strain relaxation at the surface,but the understanding of the growth and strain distributions in these complex structures is hampered by the lack of high-resolution characterization ***,we demonstrate strain mapping of an axially segmented GalnP-lnP 190 nm diameter nanowire heterostructure using scanning X-ray *** systematically investigate the strain distribution and lattice tilt in three different segment lengths from 45 to 170 nm,obtaining strain maps with about 10^-4 relative strain *** experiments were performed using the 90 nm diameter nanofocus at the NanoMAX beamline,taking advantage of the high coherent flux from the first diffraction limited storage ring MAX *** experimental results are in good agreement with a full simulation of the experiment based on a three-dimensional(3D)finite element *** largest segments show a complex profile,where the lateral strain relaxation at the surface leads to a dome-shaped strain distribution from the mismatched interfaces,and a change from tensile to compressive strain within a single *** lattice tilt maps show a cross-shaped profile with excellent qualitative and quantitative agreement with the *** contrast,the shortest measured InP segment is almost fully adapted to the surrounding GalnP segments.

关键词： strain mapping nanowire heterostructure X-ray diffraction(XRD) MAX IV finite element modeling

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High-pressure triggered quantum tunneling tuning through classical percolation in a single nanowire of a binary composite

引用

Nano Research 2019年第6期12卷 1333-1338页

作者： Sudeshna Samanta Mokwon Lee Deok-Soo Kim Jaeyong Kim Lin Wang Center for High Pressure Science & Technology Advanced Research Shanghai 201203China HYU-HPSTAR-CIS High Pressure Research Center Department of PhysicsHanyang UniversitySeoul 04763Republic of Korea Voronoi Diagram Research Center School of Mechanical EngineeringHanyang UniversitySeoul 04763Republic of Korea

In the era of miniaturization,the one-dimensional nanostructures presented numerous possibilities to realize operational nanosensors and devices by tuning their electrical transport *** size reduction,the physical properties of materials become extremely challenging to characterize and understand due to the complex interplay among structures,surface properties,strain effects,distribution of grains,and their internal coupling *** this report,we demonstrate the fabrication of a single metal-carbon composite nanowire inside a diamondanvil-cell and examine the in situ pressure-driven electrical transport *** nanowire manifests a rapid and reversible pressure dependence of the strong nonlinear electrical conductivity with significant zero-bias differential conduction revealing a quantum tunneling dominant carrier transport *** fully rationalize our observations on the basis of a metal-carbon framework in a highly compressed nanowire corroborating a quantum-tunneling boundary,in addition to a classical percolation boundary that exists beyond the percolation *** structural phase progressions were monitored to evidence the pressure-induced shape reconstruction of the metallic grains and modification of their intergrain interactions for successful explanation of the electrical transport *** pronounced sensitivity of electrical conductivity to an external pressure stimulus provides a rationale to design low-dimensional advanced pressure sensing devices.

关键词： single metal-carbon nanowire high pressure electrical transport Voronoi diagram

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Growth and characterization of straight InAs/GaAs nanowire heterostructures on Si substrate

引用

Chinese Physics B 2013年第7期22卷 377-382页

作者：颜鑫张霞李军帅吕晓龙任晓敏黄永清 State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications

Vertical InAs/GaAs nanowire （NW） heterostructures with a straight InAs segment have been successfully fabricated on Si （111） substrate by using AlGaAs/GaAs buffer layers coupled with a composition grading InGaAs segment. Both the GaAs and InAs segments are not limited by the misfit strain induced critical diameter. The low growth rate of InAs NWs is attributed to the AlGaAs/GaAs buffer layers which dramatically decrease the adatom diffusion contribution to the InAs NW growth. The crystal structure of InAs NW can be tuned from zincblende to wurtzite by controlling its diameter as well as the length of GaAs NWs. This work helps to open up a road for the integration of high-quality III-V NW heterostructures with Si.

关键词： nanowire Si buffer layer adatom diffusion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Partial oxidation of methane to syngas catalyzed by a nickel nanowire catalyst

引用

Journal of Natural Gas Chemistry 2009年第1期18卷 98-103页

作者： Xuebin Hong YaquanWang Key Laboratory for Green Chemical Technology School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

A nickel nanowire catalyst was prepared by a hard template method, and characterized by transmission electron microscopy （TEM）, N2 physical adsorption, X-ray photoelectron spectrometry （XPS）, X-ray diffraction （XRD） and H2 temperature-programmed reduction （H2-TPR）. The catalytic properties of the nanowire catalyst in the partial oxidation of methane to syngas were compared with a metallic Ni catalyst which was prepared with nickel sponge. The characterization results showed that the nickel nanowire catalyst had high specific surface area and there was more NiO phase in the nickel nanowire catalyst than in the metallic Ni catalyst. The reaction results showed that the nickel nanowire catalyst had high CH4 conversion and selectivities for H2 and CO under low space velocity.

关键词： metallic nickel nanowire catalytic partial oxidation of methane syngas

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

In-plane oriented CH_(3)NH_(3)PbI_(3) nanowire suppression of the interface electron transfer to PCBM

引用

Chinese Physics B 2021年第6期30卷 469-475页

作者： Tao Wang Zhao-Hui Yu Hao Huang Wei-Guang Kong Wei Dang Xiao-Hui Zhao Hebei Key Laboratory of Optic-Electronic Information Materials College of Physics Science and TechnologyHebei UniversityBaoding 071002China

One-dimensional nanowire is an important candidate for lead-halide perovskite-based photonic detectors and solar cells. Its surface population, diameter, and growth direction, etc., are critical for device performance. In this research,we carried out a detailed study on electron transfer process at the interface of nanowire CH_(3) NH_(3) PbI_(3)(N-MAPbI_(3))/Phenyl C61 butyric acid methyl-ester synonym(PCBM), as well as the interface of compact CH_(3) NH_(3) PbI_(3)(C-MAPbI_(3))/PCBM by transient absorption spectroscopy. By comparing the carrier recombination dynamics of N-MAPbI_(3), N-MAPbI_(3)/PCBM,C-MAPbI_(3), and C-MAPbI_(3)/PCBM from picosecond(ps) to hundred nanosecond(ns) time scale, it is demonstrated that electron transfer at N-MAPbI_(3)/PCBM interface is less efficient than that at C-MAPbI_(3)/PCBM interface. In addition, electron transfer efficiency at C-MAPbI_(3)/PCBM interface was found to be excitation density-dependent, and it reduces with photo-generation carrier concentration increasing in a range from 1.0 × 1018 cm^(-3)–4.0 × 1018 cm^(-3). Hot electron transfer,which leads to acceleration of electron transfer between the interfaces, was also visualized as carrier concentration increases from 1.0 × 10^(18) cm^(-3)–2.2 × 10^(18) cm^(-3).

关键词： lead-halide perovskite nanowire interface electron transfer transient absorption spectroscopy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Polarity control of carrier injection for nanowire feedback field-effect transistors

引用

Nano Research 2019年第10期12卷 2509-2514页

作者： Doohyeok Lim Sangsig Kim Department of Electrical Engineering Korea University145 Anam-roSeongbuk-guSeoul 02841Republic of Korea

We present polarity control of the carrier injection for a feedback field-effect transistor(FBFET)with a selectively thinned p^+-i-n^+Si nanowire(SiNW)channel and two separate *** SiNW FBFET can be reconfigured in the p-or n-channel operation modes via simple control of electric *** two separate gates induce potential barriers in the SiNW channel for selective control of the carrier *** contrast to previously reported rec on figurable tran sistors,our tran sistor features symmetry of the electrical characteristics for the p-and n-cha nnel operation ***-feedback operation of the SiNW FBFET provides superior switching characteristics for the p-and n-type 8nfigurations,including the on/off ratios(~10^5)and subthreshold swings(1.36-1.78 mV/dec).This novel tran sistor is a promising can didate for reconfigurable electro nics.

关键词： silicon nanowire reconfigurable transistor positive-feedback loop separate gate

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

引用

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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Pattern recognition of messily grown nanowire morphologies applying multi-layer connected self-organized feature maps

引用

Journal of Materials Science & Technology 2019年第5期35卷 946-956页

作者： Qing Liu Hejun Li Yulei Zhang Zhigang Zhao State Key Laboratory of Solidification Processing Carbon/Carbon Composites Technology Research Center Northwestern Polytechnical University

Multi-layer connected self-organizing feature maps(SOFMs) and the associated learning procedure were proposed to achieve efficient recognition and clustering of messily grown nanowire morphologies. The network is made up by several paratactic 2-D SOFMs with inter-layer connections. By means of Monte Carlo simulations, virtual morphologies were generated to be the training samples. With the unsupervised inner-layer and inter-layer learning, the neural network can cluster different morphologies of messily grown nanowires and build connections between the morphological microstructure and geometrical features of nanowires within. Then, the as-proposed networks were applied on recognitions and quantitative estimations of the experimental morphologies. Results show that the as-trained SOFMs are able to cluster the morphologies and recognize the average length and quantity of the messily grown nanowires within. The inter-layer connections between winning neurons on each competitive layer have significant influence on the relations between the microstructure of the morphology and physical parameters of the nanowires within.

关键词： Artificial neural networks Self-organizing feature maps Monte Carlo simulation Pattern recognition Messily grown nanowire morphologies

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The fabrication and application of Ni-DNA nanowire-based nanoelectronic devices

引用

Nano Research 2019年第6期12卷 1293-1300页

作者： Pang-Chia Chang Chia-Yu Chang Wen-Bin Jian Chiun-Jye Yuan Yu-Chang Chen Chia-Ching Chang Department of Electrophysics "National Chiao Tung University"Hsinchu 30010TaiwanChina Department of Biological Science and Technology "National Chiao Tung University"Hsinchu 30068TaiwanChina Center for Intelligent Drug Systems and Smart Bio-devices(IDS^2B) "National Chiao Tung University"Hsinchu 30068TaiwanChina Institute of Physics "Academia Sinica"Taipei 11529TaiwanChina

DNA is a self-assembled,double stranded natural molecule that can chelate and align nickel ions between its base *** fabrication of a DNA-guided nickel ion chain (Ni-DNA) device was successful,as indicated by the conducting currents exhibiting a Ni ion redox reaction-driven negative differential resistance effect,a property unique to mem-elements (1).The redox state of nickel ions in the Ni-DNA device is programmable by applying an external bias with different polarities and writing times (2).The multiple states of Ni-DNA-based memristive and memcapacitive systems were characterized (3).As such,the development of Ni-DNA nanowire device-based circuits in the near future is proposed.

关键词： DNA-guided nickel ion chain (Ni-DNA) negative differential resistance (NDR) memristive systemmem capacitive system nanowire

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：