检索结果-南通市图书馆

Highly Enhanced Visible-Light-Driven Photoelectrochemical Performance of ZnO-Modified in_2S_3 Nanosheet Arrays by Atomic Layer Deposition

引用

Nano-Micro Letters 2018年第3期10卷 79-90页

作者： Ming Li Xinglong Tu Yunhui Wang Yanjie Su Jing Hu Baofang Cai Jing Lu Zhi Yang Yafei Zhang Key laboratory for Thin Film and Microfabrication of the Ministry of Education Department of Micro/Nano Electronics School of Electronics Information and Electrical Engineering Shanghai Jiao Tong University State Key lab of Transducer Technology Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences National Engineering research center for Nanotechnology College of Science Nanjing University of Posts and Telecommunications

Photoanodes based on in_2S_3/ZnO heterojunction nanosheet arrays(NSAs) have been fabricated by atomic layer deposition of ZnO over in_2S_3 NSAs, which were in situ grown on fluorine-doped tin oxide glasses via a facile solvothermal process. The as-prepared photoanodes show dramatically enhanced performance for photoelectrochemical(PEC) water splitting, compared to single semiconductor counterparts. The optical and PEC properties of in_2S_3/ZnO NSAs have been optimized by modulating the thickness of the Zn O overlayer. After pairing with ZnO, the NSAs exhibit a broadened absorption range and an increased light absorptance over a wide wavelength region of 250–850 nm. The optimized sample of in_2S_3/ZnO-50 NSAs shows a photocurrent density of 1.642 m A cm^(-2)(1.5 V vs. RHE) and an incident photonto-current efficiency of 27.64% at 380 nm(1.23 V ***), which are 70 and 116 times higher than those of the pristine in_2S_3 NSAs, respectively. A detailed energy band edge analysis reveals the type-ii band alignment of the in_2S_3/ZnO heterojunction, which enables efficient separation and collection of photogenerated carriers,especially with the assistance of positive bias potential, and then results in the significantly increased PEC activity.

关键词： in2S3/ZnO Heterojunction Nanosheet arrays Atomic layer deposition Photoelectrochemical Water splitting Energy band

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

A flexible and stretchable bionic true random number generator

引用

Nano research 2022年第5期15卷 4448-4456页

作者： Yongbiao Wan Kun Chen Feng Huang Pidong Wang Xiao Leng Dong Li Jianbin Kang Zhiguang Qiu Yao Yao Microsystem and Terahertz research center China Academy of Engineering PhysicsChengdu 610200China institute of Electronic Engineering China Academy of Engineering PhysicsMianyang 621999China School of electronics and information Technology State Key Lab of Opto-Electronic Materials&TechnologiesGuangdong Province Key Lab of Display Materials and TechnologiesSun Yat-sen UniversityGuangzhou 510275China

The volume of securely encrypted data transmission increases continuously in modern society with all things *** this end,true random numbers generated from physical sources are highly required for guaranteeing security of encryption and decryption schemes for exchanging sensitive ***,majority of true random number generators(TRNGs)are mechanically rigid,and thus cannot be compatibly integrated with some specific flexible ***,we present a flexible and stretchable bionic TRNG inspired by the uniqueness and randomness of biological *** flexible TRNG film is molded from the surface microstructures of natural plants(e.g.,ginkgo leaf)via a simple,low-cost,and environmentally friendly manufacturing *** our proof-of-principle experiment,the TRNG exhibits a fast generation speed of up to 1.04 Gbit/s,in which random numbers are fully extracted from laser speckle patterns with a high extraction rate of 72%.Significantly,the resulting random bit streams successfully pass all randomness test suites including NiST,TestU01,and *** after 10,000 times cyclic stretching or bending tests,or during temperature shock(-25-80℃),the bionic TRNG still reveals robust mechanical reliability and thermal *** a flexible TRNG shows a promising potential in information security of emerging flexible networked electronics.

关键词： random number generator flexible electronics polydimethylsiloxane(PDMS) bionic microstructure information security

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

NbN superconducting nanowire single photon detector with efficiency over 90% at 1550 nm wavelength operational at compact cryocooler temperature

引用

Science China(Physics,Mechanics & Astronomy) 2017年第12期60卷 26-35页

作者： WeiJun Zhang LiXing You Hao Li Jia Huang ChaoLin Lv Lu Zhang XiaoYu Liu JunJie Wu Zhen Wang XiaoMing Xie State Key lab of Functional Materials for informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China CAS center for Excellence in Superconducting electronics Shanghai 200050 China

The rapid development of superconducting nanowire single-photon detectors over the past decade has led to numerous advances in quantum information technology. The record for the best system detection efficiency at an incident photon wavelength of 1550 nm is 93%. This performance was attained from a superconducting nanowire single-photon detector made of amorphous WSi; such detectors are usually operated at sub-Kelvin temperatures. in this study, we first demonstrate superconducting nanowire single-photon detectors made of polycrystalline NbN with system detection efficiency of 90.2% for 1550-nm-wavelength photons at2.1 K, accessible with a compact cryocooler. The system detection efficiency saturated at 92.1% when the temperature was lowered to 1.8 K. We expect the results lighten the practical and high performance superconducting nanowire single-photon detectors to quantum information and other high-end applications.

关键词： detection efficiency NbN superconducting nanowire single-photon detector(SNSPD) quantum information

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

Performance Evaluation with improved Receiver Design for Asynchronous Coordinated Multipoint Transmissions

引用

Chinese Journal of electronics 2016年第2期25卷 372-378页

作者： CAO Yuan WEN Yinghong MENG Xiangyang XU Wei National Engineering research center of Rail Transportation Operation and Control System. Beijing Jiaotong University School of Electronic and information Engineering Beijing Jiaotong University National Mobile Communications research lab. Southeast University

Joint transmission is one of the ma jor transmission schemes in Coordinated multipoint(Co MP)transmission/reception systems for Long term evolutionadvanced(LTE-A). Due to different distances between User equipments(UE) and Base stations(BS), signals are not able to arrive at the receiver with perfect synchronization, which implies that the reception at UE is asynchronous. This paper presents an evaluation on asynchronous UE reception in multi-cell downlink joint transmission systems using our LTE-based Co MP ***, due to asynchronous reception, we propose an improved reception strategy to mitigate the interference which compensate for Rx timing difference on Joint transmission(JT) Co MP systems. Simulation results show that the per-subband global precoding scheme widely used in the Co MP system is considerably sensitive to asynchronous reception since the performance is dominated by the subcarrier used for precoding vector calculation. it is verified that our proposed solution is able to achieve significant improvements under asynchronous reception.

关键词： Joint transmission Asynchronous reception Global precoding CoMP

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Associative learning of a three-terminal memristor network for digits recognition

引用

Science China(information Sciences) 2023年第2期66卷 209-218页

作者： Yiming REN Bobo TiAN Mengge YAN Guangdi FENG Bin GAO Fangyu YUE Hui PENG Xiaodong TANG Qiuxiang ZHU Junhao CHU Chungang DUAN Key laboratory of Polar Materials and Devices (MOE) Ministry of Education Department of ElectronicsEast China Normal University Zhejiang lab institute of Microelectronics Beijing Innovation Center for Future Chips (ICFC) Tsinghua University Collaborative innovation center of Extreme Optics Shanxi University

imitating the associative intelligence of the biological brain is attractive but is poorly achieved in hardware because the complex tunable connection in neural networks is difficult to reproduce. We develop a circuit composed of a three-terminal memristor network to reproduce the biological conditioning process artificially. The synaptic weight between co-firing neurons is strengthened simultaneously by generating a feedback signal from the integrate-and-fire neuron to the gate of the synaptic memristor. The network allows the multi-associative capacity of recalling more than one digit in one circuit. Both single and multi-associative learning for recalling digital images are achieved. Furthermore, all 10 digital images from “0” to “9” are successfully recalled in an associative network with such paralleling circuits. Assisted by this associative layer, a typical classification network effectively improves the recognition rate for fragmentary digital *** work sheds light on brain-inspired artificial associative memory and provides a strategy for applications,such as object recognition with partial features and similar scenes.

关键词： artificial intelligence associative learning memristor classification network

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

FWNN for interval Estimation with interval Learning Algorithm

引用

Journal of Systems Engineering and electronics 1998年第1期9卷 56-66页

作者： Wang, Ling Liu, Fang Jiao, Licheng State Key lab of RSP and NN research center Xidian University Xi'an 710071 P. R. China

in this paper, a wavelet based fuzzy neural network for interval estimation of processed data with its interval learning algorithm is proposed. it is also proved to be an efficient approach to calculate the wavelet c... 详细信息

关键词： Fuzzy wavelet neural network (FWNN) interval learning algorithm.

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

Dual upconversion nanophotoswitch for security encoding

引用

Science China Materials 2019年第3期62卷 368-378页

作者： Weijing Yao Qingyong Tian Bin Tian Mengxiao Li Huanjun Wang Pan Zeng Li Liu He Zheng Wei Wu laboratory of printable Functional Nanomaterials and Printed electronics School of Printing and PackagingWuhan UniversityWuhan 430072China School of Physics and Technology Wuhan UniversityWuhan 430072China Shenzhen research institute of Wuhan University Shenzhen 518057China National&Local Joint Engineering research center of Advanced Packaging Materials Developing Technology Hunan University of TechnologyZhuzhou 412007China

Light-harvesting lanthanide ions(Ln3+) doped NaYF4 inks could provide polychromatic patterns for opposing counterfeiting commodity infestation because of their distinctive upconversion photoluminescence(UPL) properties. Herein, three kinds of core-triple-shell Ln3+ions doped NaYF4 upconversion nanocrystals(UCNCs) are synthesized through modified high-temperature coprecipitation, which demonstrate excellent UPL properties of independent emitting colors under 808 or 980 nm laser excitation. Additive mixing three kinds of 808 nm emitted red-green-blue(RGB)UCNCs colloid solution can precisely regulate the emissions of the suspension for achieving full-color display. The as-obtained RGB three-primary colors induced by 808 nm laser accomplish broader color gamut than traditional standard RGB(s RGB) model and printing cyan-magenta-yellow(CMY)model. in addition, various China zodiac patterns and complex multicolor images are printed by the as-formulated UCNCs inks through screen printing technology. The printed patterns present colorful and polychromatic sequential toning visualization patterns under 808 nm excitation, while present another succession of gradually changed versatile patterns under 980 nm excitation. As a proof of concept, transparent polyvinyl chloride(PVC) self-adhesive anti-counterfeiting label is attached to the bottle of wine package for practical application. The demonstration of multiple model patterns of Chinese zodiac and poetry images based on these core-tripleshell UCNCs can be selected as a conceivable substitute of traditional single model patterns, underlining the full-color anti-counterfeiting level.

关键词： Upconversion core-triple-shell UCNCs wide color gamut full-color model anti-counterfeiting

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

Phthalimide and Naphthalimide end-Capped Diketopyrrolopyrrole for Organic Photovoltaic Applications

引用

Chinese Journal of Chemistry 2017年第9期35卷 1396-1404页

作者： Ming Chen Chenchen Du Xiaolei Ren Maoheng Yi Jinduo Yi Chufeng Chen Feng Liu Minjie Li Changqi Ma Hongyu Wang Department of Chemistry College of Science Shanghai University 99 Shangda Road Shanghai 200444 China printable electronics research center Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences 398 Ruo Shui Road SEID SIP Suzhou Jiangsu 215123 China No. 2 High School Affiliated to East China Normal University Zizhu 350 Zifeng Road Minhang District Shanghai 200241 China Department of Physics and Astronomy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China

Two small molecules named Pi-DPP and Ni-DPP with a DPP core as the central strong acceptor unit and phthalimide/naphthalimide as the terminal weak acceptor were designed and synthesized. The effects of terminal phthalimide/naphthalimide units on the thermal behavior, optical and electrochemical properties, as well as the photovoltaic performance of these two materials were systematically studied. Cyclic voltammetry revealed that the lowest unoccupied molecular orbitals （LUMO）（- -3.6 eV） of both molecules were intermediate to common electron donor （P3HT） and acceptor （PCBM）. This indicated that Pi-DPP and Ni-DPP may uniquely serve as electron donor when blended with PCBM, and as electron acceptor when blended with P3HT, where sufficient driving forces between DPPs and PCBM, as well as between P3HT and DPPs should be created for exciton dissociation. Using as electron donor materials, Pi-DPP and Ni-DPP devices exhibited low power conversion efficiencies （PCEs） of 0.90% and 0.76% by blending with PCBM, respectively. And a preliminary evaluation of the potential of the Ni-DPP as electron acceptor material was carried out using P3HT as a donor material, and P3HT：Ni-DPP device showed a PCE of 0.6%, with an open circuit voltage （Voc） of 0.7 V, a short circuit current density （Jsc） of 1.91 mA·cm^-2, and a fill factor （FF） of 45%.

关键词： diketopyrrolopyrrole phthalimide naphthalimide organic solar cells non-fullerene acceptor

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

The past and future of multi-gate field-effect transistors:Process challenges and reliability issues

引用

Journal of Semiconductors 2021年第2期42卷 29-39页

作者： Ying Sun Xiao Yu Rui Zhang Bing Chen Ran Cheng School of Micro-Nano electronics Zhejiang UniversityHangzhou 310058China intelligent Chip research center Zhejiang LabHangzhou 311121China

This work reviews the state-of-the art multi-gate field-effect transistor(MuGFET)process technologies and compares the device performance and reliability characteristics of the MuGFETs with the planar Si CMOS *** to the 3D wrapped gate structure,MuGFETs can suppress the SCEs and improve the ON-current performance due to the volume inversion of the channel *** the Si CMOS technology pioneers to sub-10 nm nodes,the process challenges in terms of lithography capability,process integration controversies,performance variability *** also discussed in this *** to the severe self-heating effect in the MuGFETs,the ballistic transport and reliability characteristics were *** alternatives for the current Si MuGFET technology were discussed at the end of the *** work needs to be done to realize novel high mobility channel MuGFETs with better performance and reliability.

关键词： Si FinFETs ballistic transport high mobility bias-temperature instability hot-carrier injection germanium

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

integrated Train Ground Radio Communication System Based TD-LTE

引用

Chinese Journal of electronics 2016年第4期25卷 740-745页

作者： ZHAO Hongli CAO Yuan ZHU Li XU Wei National Engineering research center of Rail Transportation Operation and Control System Beijing Jiaotong University State Key laboratory of Rail Traffic Control and Safety Beijing Jiaotong University National Mobile Communications research lab. Southeast University

in existing metro systems,the train ground radio communication system for different applications are deployed *** and constructing the communication infrastructures repeatedly wastes substantial social resources,and it brings difficulties to maintain all these *** present the communication Quality of service(Qo S) requirement for different train ground radio *** integrated TD-LTE based train ground radio communication system for the metro system(LTE-M) is designed *** order to test the LTEM system performance,an indoor testing environment is set *** channel simulator and programmable attenuators are used to simulate the real metro *** test results show that the designed LTE-M system performance satisfies metro communication requirements.

关键词： Communication based train control(CBTC) Train control LTE-M Performance test

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

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：