检索结果-内蒙古大学图书馆

International Conference on Vacuum Electronics

作者： Divya J. Prakash Jay Vijayamohanan Grant D. Heileman Max G. Lagally Daniel W. van der Weide Christos Christodoulou Darryl Shima Ganesh Balakrishnan Francesca Cavallo Center for High Technology Materials University of New Mexico Albuquerque NM USA Department of Electrical and Computer Engineering University of New Mexico Albuquerque NM USA Department of Materials Science and Engineering University of Wisconsin-Madison Madison WI USA Department of Electrical and Computer Engineering University of Wisconsin-Madison Madison WI USA

We characterize the effect of heat-treating helical slow-wave structures fabricated by self-assembly of Cr/Au/Cr nanomembrane ribbons. We observe that annealing introduces plastic deformation while reducing reflection... 详细信息

ISBN: (数字)9798350348705

ISBN: (纸本)9798350348712

关键词： Heating systems Gold Self-assembly Annealing Deformation Insertion loss Reflection Vacuum electronics Plastics Electron sources

来源：评论

学校读者我要写书评

暂无评论

A disposable tartrazine sensor fabricated with a synchronously activated nanocomposite comprising gadolinium molybdate nanoflowers anchored on functionalized carbon nanofibers

引用

New Journal of Chemistry 2023年第6期48卷 2660-2672页

作者： Jayapaul, Abishek Sakthivel, Rajalakshmi Lin, Yu-Chien Dhawan, Udesh Liu, Xinke Wen, Hsiao-Wei Chung, Ren-Jei No. 1 Section 3 Zhongxiao E. Rd. Taipei10608 Taiwan Centre for the Cellular Microenvironment Division of Biomedical Engineering James Watt School of Engineering Mazumdar-Shaw Advanced Research Centre University of Glasgow GlasgowG116EW United Kingdom College of Materials Science and Engineering Chinese Engineering and Research Institute of Microelectronics Shenzhen University Shenzhen518060 China Department of Electrical and Computer Engineering National University of Singapore Singapore117583 Singapore Department of Food Science and Biotechnology National Chung Hsing University Taichung402202 Taiwan Food and Animal Product Safety Inspection Center National Chung Hsing University Taichung402202 Taiwan Taipei10608 Taiwan

Tartrazine (TRZ) is a synthetic food dye considered noxious to human health and a toxic environmental contaminant owing to the presence of a harmful azo group (-N 00000000 00000000 00000000 00000000 11111111 00000000 11111111 00000000 00000000 00000000 N-) in its chemical structure. The global necessity to prevent food contamination has led scientific researchers to develop disposable sensing platforms. This study aims to integrate nanotechnology with electrochemistry to fabricate a disposable screen-printed carbon electrode (SPCE) with a nanocomposite composed of gadolinium molybdate (Gd2MoO6) nanoflowers decorated on an enmeshed matrix of acid-functionalized carbon nanofibers (f-CNF). The hierarchal arrangement of distinct components in the nanocomposite is promoted by synergism through the formation of a hybrid heterojunction. This heterojunction in the electrode modifier activates the electrode to sense TRZ with a remarkable limit of detection (0.8 nmol L−1) and quantification (2 nmol L−1) over a broad linear range of 0.025 μM to 216.45 μM. Furthermore, the functional sensing ability of the proposed sensor was analyzed in various commercial food products. © 2024 The Royal Society of Chemistry.

关键词： Nanocomposites

来源：评论

学校读者我要写书评

暂无评论

Plasmon-induced trap filling at grain boundaries in perovskite solar cells

引用

Light(science & Applications) 2021年第11期10卷 2233-2244页

作者： Kai Yao Siqi Li Zhiliang Liu Yiran Ying Petr Dvořák Linfeng Fei TomášŠikola Haitao Huang Peter Nordlander Alex K-Y.Jen Dangyuan Lei Institute of Photovoltaics/Department of Materials Science and Engineering Nanchang UniversityNanchang330031China Department of Applied Physics The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Materials Science and Engineering City University of Hong KongKowloonHong KongChina Institute of Physical Engineering Brno University of TechnologyTechnická2Brno61669Czech Republic Laboratory for Nanophotonics Department of Physics and AstronomyDepartment of Electrical and Computer EngineeringRice UniversityHoustonTexas77005USA

The deep-level traps induced by charged defects at the grain boundaries(GBs)of polycrystalline organic-inorganic halide perovskite(OIHP)films serve as major recombination centres,which limit the device ***,we incorporate specially designed poly(3-aminothiophenol)-coated gold(Au@PAT)nanoparticles into the perovskite absorber,in order to examine the influence of plasmonic resonance on carrier dynamics in perovskite solar *** changes in the photophysical properties of the OIHP films reveal that plasmon excitation could fill trap sites at the GB region through photo-brightening,whereas transient absorption spectroscopy and density functional theory calculations correlate this photo-brightening of trap states with plasmon-induced interfacial *** a result,the device achieved the best efficiency of 22.0%with robust operational *** work provides unambiguous evidence for plasmon-induced trap occupation in OIHP and reveals that plasmonic nanostructures may be one type of efficient additives to overcome the recombination losses in perovskite solar cells and thin-film solar cells in general.

关键词： perovskite grain absorber

来源：评论

学校读者我要写书评

暂无评论

Numerical Investigation of Si Nanowires Integrated Perovskite for Efficient Tandem Solar Cell 24

Numerical Investigation of Si Nanowires Integrated Perovskit...

引用

24th International Arab Conference on Information Technology, ACIT 2023

作者： El-Bashar, R. Hameed, Mohamed Farhat O. Abdelhamid, Hamdy Dai, Jun Obayya, S.S.A. Cairo University Giza12613 Egypt Center of Nanotechnology Zewail City of Science and Technology Giza12578 Egypt College of Engineering and Information Technology Ajman University Electrical and Computer Engineering Department United Arab Emirates College of Science Jiangsu University of Science and Technology Department of Physics Zhenjiang212100 China Centre for Photonics and Smart Materials Zewail City of Science and Technology Giza Egypt

ISBN: (纸本)9798350384307

In this study, tandem solar cell (SC) based on MAPbI3-prevoskiteISi-nanowires (P|Si-NWs) structure is proposed and numerically investigated. The simulation results are calculated using the finite difference time domain (FDTD) method. The optical efficiency of the proposed tandem SC is increased to 40% compared to 37.5% for the counterpart planar tandem structure. This is owing to the high absorption coefficient and optimum MAPbI3 band gap of the perovskite SC. Further, the supported wave-guided modes and excited Bloch modes due to the periodic SiNWs help increase the optical absorption through the suggested SC. Further, the perovskite thickness can be controlled to efficiently balance the photo-generated current with the bottom Si layer with improved output efficiency. The Jph of the reported SC is equal to 13.1 mA/cm2 with an enhancement of 37.5% relative to planar P|Si structure. Consequently, the proposed tandem PSiNWs structure offers better electrical performance with reduced Si-material and low manufacturing cost. © 2023 IEEE.

关键词： Bloch modes Energy harvesting Finite difference time domain Nanowires Perovskite solar cell

来源：评论

学校读者我要写书评

暂无评论

厚度变化不敏感的近红外量子点发光二极管

引用

science Bulletin 2023年第23期68卷 2954-2961,M0005页

作者：沈万姗刘洋 Luke Grater So Min Park Haoyue Wan 俞燕君潘嘉琳孔繁诚田起生周东营刘泽柯马万里孙宝全 Sjoerd Hoogland 王亚坤廖良生 Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Department of Electrical and Computer Engineering University of TorontoToronto M5S 3G4Canada Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyMacao 999078China

近红外发光二极管在通信、传感和成像等领域的应用日益广泛.量子点作为一种有潜力的发光材料,在近红外发光范围内具有独特的优势.然而,现有的近红外量子点发光二极管存在一个严重的问题,即它们对发射层厚度非常敏感.为了解决这个问题,... 详细信息

近红外发光二极管在通信、传感和成像等领域的应用日益广泛.量子点作为一种有潜力的发光材料,在近红外发光范围内具有独特的优势.然而,现有的近红外量子点发光二极管存在一个严重的问题,即它们对发射层厚度非常敏感.为了解决这个问题,本文采用了一系列创新方法.通过引入核壳结构和表面处理,使光致发光量子效率达到80%,成功提高了载流子的传输性能并且增加了量子点的辐射复合速率,从而获得具有对发光层厚度不敏感的高效近红外量子点发光二极管.最终作者制备得到了在40-220 nm的范围内表现出性能稳定的近红外量子点发光二极管,该发光器件的发光峰波长位于1025 nm处,最高外量子效率达到11.5%.这项研究为近红外发光领域的发展提供了有力的支持,为未来光电子学和光通信技术的进步铺平了道路.

关键词： Quantum dots Near-infrared Light-emitting diodes Electroluminescence

来源：评论

学校读者我要写书评

暂无评论

Automated Global Analysis of Experimental Dynamics through Low-Dimensional Linear Embeddings

arXiv

引用

arXiv 2024年

作者： Moore, Samuel A. Mann, Brian P. Chen, Boyuan Department of Mechanical Engineering and Materials Science Duke University DurhamNC United States Department of Electrical and Computer Engineering Duke University DurhamNC United States Department of Computer Science Duke University DurhamNC United States

Dynamical systems theory has long provided a foundation for understanding evolving phenomena across scientific domains. Yet, the application of this theory to complex real-world systems remains challenging due to issues in mathematical modeling, nonlinearity, and high dimensionality. In this work, we introduce a data-driven computational framework to derive low-dimensional linear models for nonlinear dynamical systems directly from raw experimental data. This framework enables global stability analysis through interpretable linear models that capture the underlying system structure. Our approach employs time-delay embedding, physics-informed deep autoencoders, and annealing-based regularization to identify novel low-dimensional coordinate representations, unlocking insights across a variety of simulated and previously unstudied experimental dynamical systems. These new coordinate representations enable accurate long-horizon predictions and automatic identification of intricate invariant sets while providing empirical stability guarantees. Our method offers a promising pathway to analyze complex dynamical behaviors across fields such as physics, climate science, and engineering, with broad implications for understanding nonlinear systems in the real world. © 2024, CC BY.

关键词： Nonlinear dynamical systems

来源：评论

学校读者我要写书评

暂无评论

Periodic phase diagrams in micromagnetics with an eigenvalue solver

引用

IEEE Transactions on Magnetics 2025年

作者： Ai, Fangzhou Lin, Zhuonan Duan, Jiawei Lomakin, Vitaliy University of California Department of Electrical and Computer Engineering San DiegoCA92093 United States University of California Center for Memory and Recording Research San DiegoCA92093 United States University of California Program in Materials Science and Engineering San Diego92093 United States

This work introduces an approach to compute periodic phase diagram of micromagnetic systems by solving a periodic linearized Landau-Lifshitz-Gilbert (LLG) equation using an eigenvalue solver with the Finite Element Method formalism. The linear operator in the eigenvalue problem is defined as a function of the periodic phase-shift wave vector. The dispersion diagrams are obtained by solving the eigenvalue problem for complex eigenfrequencies and corresponding eigenstates for a range of prescribed wave vectors. The presented approach incorporates a calculation of the periodic effective field, including the exchange and magnetostatic field components. The approach is general in that it allows 3D problems to be handled with any 1D, 2D, and 3D periodicities. The ability to calculate periodic diagrams provides insights into the spin wave propagation and localized resonances in complex micromagnetic structures. © 1965-2012 IEEE.

关键词： Spin waves

来源：评论

学校读者我要写书评

暂无评论

Advances in solar energy harvesting integrated by van der Waals graphene heterojunctions

引用

RSC Advances 2023年第44期13卷 31273-31291页

作者： Le, Top Khac Mai, The-Hung Iqbal, Muhammad Aamir Vernardou, Dimitra Dao, Van-Duong Ponnusamy, Vinoth Kumar Rout, Chandra Sekhar Pham, Phuong V. Faculty of Materials Science and Technology University of Science Ho Chi Minh City700000 Viet Nam Vietnam National University Ho Chi Minh City700000 Viet Nam Department of Physics National Sun Yat-sen University Kaohsiung80424 Taiwan School of Materials Science and Engineering Zhejiang University Hangzhou310027 China Department of Electrical and Computer Engineering School of Engineering Hellenic Mediterranean University Heraklion71410 Greece Faculty of Biotechnology Chemistry and Environmental Engineering Phenikaa University Hanoi100000 Viet Nam Department of Medicinal and Applied Chemistry and Research Center for Precision Environmental Medicine Kaohsiung Medical University Kaohsiung807 Taiwan Department of Medical Research Kaohsiung Medical University Hospital Kaohsiung807 Taiwan Department of Chemistry National Sun Yat-sen University Kaohsiung80424 Taiwan Centre for Nano and Material Sciences Jain University Bangalore562112 India

Graphene has garnered increasing attention for solar energy harvesting owing to its unique features. However, limitations hinder its widespread adoption in solar energy harvesting, comprising the band gapless in the molecular orbital of graphene lattice, its vulnerability to oxidation in oxidative environments, and specific toxic properties that require careful consideration during development. Beyond current challenges, researchers have explored doping graphene with ionic liquids to raise the lifespan of solar cells (SCs). Additionally, they have paid attention to optimizing graphene/Si Schottky junction or Schottky barrier SCs by enhancing the conductivity and work function of graphene, improving silicon's reflectivity, and addressing passivation issues at the surface/interface of graphene/Si, resulting in significant advancements in their power conversion efficiency. Increasing the functional area of graphene-based SCs and designing efficient grid electrodes are also crucial for enhancing carrier collection efficiency. Flaws and contaminants present at the interface between graphene and silicon pose significant challenges. Despite the progress of graphene/Si-based photovoltaic cells still needs to catch up to the efficiency achieved by commercially available Si p-n junction SCs. The low Schottky barrier height, design-related challenges associated with transfer techniques, and high lateral resistivity of graphene contribute to this performance gap. To maximize the effectiveness and robustness of graphene/Si-based photovoltaic cells, appropriate interlayers have been utilized to tune the interface and modulate graphene's functionality. This mini-review will address ongoing research and development endeavors using van der Waals graphene heterojunctions, aiming to overcome the existing limitations and unlock graphene's full potential in solar energy harvesting and smart storage systems. © 2023 The Royal Society of Chemistry.

关键词： Graphene

来源：评论

学校读者我要写书评

暂无评论

A Dynamic Model for Pauses in the Synthesized Speech of Mathematical Expressions in MathML 14

A Dynamic Model for Pauses in the Synthesized Speech of Math...

引用

14th International Conference on Education Technology and computers, ICETC 2022

作者： Souza, Adriana Freitas, Diamantino Bahia Federal Institute of Education Science and Technology Porto Seguro Bahia Brazil Doctoral Program in Digital Media Faculty of Engineering Faculty of Engineering of University of Porto Porto Portugal Department of Electrical and Computer Engineering Faculty of Engineering of University of Porto Porto Portugal

ISBN: (纸本)9781450397766

Voice synthesizers still present several challenges in the speech of mathematical content, as spoken mathematics has quite peculiar rules. In the synthesized speech, pauses help blind and visually impaired students identify the limits of mathematical operators and subexpressions. However, most studies on pauses define them uniformly or use simple punctuation marks to force the synthesizer to introduce pauses in certain parts of the expression. Speech is a dynamic process and pauses in expressions also need to be dynamic to make the synthetic speech of expressions more natural, as this can help in memorizing this type of content. This work proposed a dynamic model of pauses for mathematical expressions. Collected math expressions spoken by teachers were used to create the model. These expressions were useful for identifying patterns and creating a linear regression model. Blind and visually impaired students evaluated the model. Some improvements were observed when we compared the synthesized mathematical expressions with the model and Audiomath, the parameter tool used in this study. © 2022 ACM.

关键词： Dynamic models

来源：评论

学校读者我要写书评

暂无评论

Computational study of the role of counterions and solvent dielectric in determining the conductance of B-DNA

引用

Physical Review E 2023年第4期107卷 044404-044404页

作者： Yiren Wang Busra Demir Hashem Mohammad Ersin Emre Oren M. P. Anantram Deparment of Electrical and Computer Engineering University of Washington Seattle Washington 98105 USA Bionanodesign Laboratory Department of Biomedical Engineering and Department of Materials Science & Nanotechnology Engineering TOBB University of Economics and Technology Ankara 06510 Turkey Department of Electrical Engineering Kuwait University P.O. Box 5969 Safat 13060 Kuwait

DNA naturally exists in a solvent environment, comprising water and salt molecules such as sodium, potassium, magnesium, etc. Along with the sequence, the solvent conditions become a vital factor determining DNA structure and thus its conductance. Over the last two decades, researchers have measured DNA conductivity both in hydrated and almost dry (dehydrated) conditions. However, due to experimental limitations (the precise control of the environment), it is very difficult to analyze the conductance results in terms of individual contributions of the environment. Therefore, modeling studies can help us to gain a valuable understanding of various factors playing a role in charge transport phenomena. DNA naturally has negative charges located at the phosphate groups in the backbone, which provides both the connections between the base pairs and the structural support for the double helix. Positively charged ions such as the sodium ion (Na+), one of the most commonly used counterions, balance the negative charges at the backbone. This modeling study investigates the role of counterions both with and without the solvent (water) environment in charge transport through double-stranded DNA. Our computational experiments show that in dry DNA, the presence of counterions affects electron transmission at the lowest unoccupied molecular orbital energies. However, in solution, the counterions have a negligible role in transmission. Using the polarizable continuum model calculations, we demonstrate that the transmission is significantly higher at both the highest occupied and lowest unoccupied molecular orbital energies in a water environment as opposed to in a dry one. Moreover, calculations also show that the energy levels of neighboring bases are more closely aligned to ease electron flow in the solution.

关键词： electrical conductivity Electronic structure of atoms & molecules Quantum transport DNA Nucleic acids Density functional theory Methods in transport Nonequilibrium Green's function

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：