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IEEE Sensors Council 电气和电子工程师学会传感器理事会
IF 4.3 2区 综合性期刊 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2024-07-15 DOI: 10.1109/JSEN.2024.3421215
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引用次数: 0
Ab Initio Modeling of Doped/Undoped ArGNR Sensors for No2 Detection 用于二氧化氮检测的掺杂/未掺杂 ArGNR 传感器的 Ab Initio 建模
IF 2.1 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2024-07-02 DOI: 10.1109/TNANO.2024.3421334
Kamal Solanki;Swati Verma;Pankaj Kumar Das;P.P. Paltani;Manoj Kumar Majumder
Elevated levels of nitrogen dioxide (NO2) pollutants have captured significant attention due to their profound influence on the cardiovascular and respiratory systems; hence, high-performance monitoring systems for pollutants are imperative to safeguard the well-being of individuals. In this regard, a hydrogen-passivated two-probe Armchair Graphene Nanoribbon (ArGNR) gas sensor utilizing a doped/undoped configuration can be considered to mitigate the NO2 pollutants. Therefore, this research, for the first time, examines the influence of channel length and transport properties on the i-v behavior of NO2 pollutants for doped/undoped ArGNR-based sensors. The electronic properties are rigorously examined using the density function theory (DFT) within the linear combination of atomic orbital (LCAO) and semi-empirical computation techniques, leveraging principles derived from non-equilibrium Green's function. In comparison to the undoped ArGNR, the BAs doped ArGNR exhibits superior chemisorption energy of −2.3 eV (with spin effect) and −3.3 eV (without spin effect), coupled with the substantial bandgap variation of −10.22, 36.50% (with spin effect) and 100% (without spin effect), at the B and As sites, respectively. In addition, a high quantum transport spectrum of 57% and significant current variations of 95% and 77% at the B and As sites, respectively, upon the NO2 adsorption. These findings suggest that the B-As-doped ArGNR sensor provides a promising solution for susceptible NO2 detection.
由于二氧化氮(NO2)污染物对心血管和呼吸系统的深远影响,其浓度水平的升高已引起人们的极大关注;因此,高性能的污染物监测系统对保障个人健康至关重要。在这方面,可以考虑利用掺杂/未掺杂配置的氢钝化双探针臂章石墨烯纳米带(ArGNR)气体传感器来缓解二氧化氮污染物。因此,本研究首次考察了基于掺杂/未掺杂 ArGNR 的传感器的沟道长度和传输特性对 NO2 污染物的 iv 行为的影响。利用原子轨道线性组合(LCAO)和半经验计算技术中的密度函数理论(DFT),以及从非平衡格林函数中得出的原理,对电子特性进行了严格研究。与未掺杂的 ArGNR 相比,掺杂 BAs 的 ArGNR 表现出更高的化学吸附能,分别为 -2.3 eV(有自旋效应)和 -3.3 eV(无自旋效应),同时在 B 和 As 位点的带隙变化也很大,分别为 -10.22、36.50%(有自旋效应)和 100%(无自旋效应)。此外,在吸附二氧化氮时,B 和 As 位点的量子传输谱高达 57%,电流变化显著,分别为 95% 和 77%。这些发现表明,掺杂 B-As 的 ArGNR 传感器为易受影响的二氧化氮检测提供了一种前景广阔的解决方案。
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引用次数: 0
Highly Efficient (>36%) Lead-Free Cs2BiAgI6/CIGS Based Double Perovskite Solar Cell (DPSC) With Dual-Graded Light Absorber Layers for Next Generation Photovoltaic (PV) Technologies 基于双梯度光吸收层的无铅 Cs${}_{2}$ BiAgI$_{6}$/CIGS 双包晶太阳能电池 (DPSC),用于下一代光伏 (PV) 技术
IF 2.1 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2024-07-02 DOI: 10.1109/TNANO.2024.3421315
G.P.S. Prashanthi;Umakanta Nanda
Perovskite solar cells (PSCs) are a novel emerging technology that are the third generation of solar cells, following wafer-based and thin-film-based predecessors. Solar photovoltaic (PV) technology that uses perovskite materials has a significant advantage over conventional solar PV, as it can respond to various light wavelengths and increase the amount of sunlight converted to electricity. In addition, PSCs are flexible, semi-transparent, customizable, lightweight, and have a high power conversion efficiency (PCE). Through the use of dual-graded light absorber/active layers, and double perovskite lead-free material Cs$_{2}$BiAgI$_{6}$, this study seeks to increase the efficiency of PSCs. A unique device structure (ITO/ZnO/Double Perovskite Cs$_{2}$BiAgI$_{6}$/CIGS/High purity Spiro-OMeTAD/Au) of lead-free double perovskite material-based solar cell has been simulated using the SCAPS-1D one-dimensional solar cell capacitance simulator. The optimized solar cell output parameters achieved in this work include voltage in an open circuit (Voc) of 1.2258 V, current density in a short circuit (Jsc) of 34.292 mA/cm$^{2}$, fill factor (FF) of 85.95$%$, and power conversion efficiency (PCE) of 36.13$%$, which gets close to the single-junction PSCs' Shockley-Queisser Efficiency (SQ) limit.
过氧化物太阳能电池(PSCs)是一种新型的新兴技术,是继晶圆太阳能电池和薄膜太阳能电池之后的第三代太阳能电池。与传统的太阳能光伏技术相比,使用了包晶体材料的太阳能光伏技术具有显著优势,因为它能对各种波长的光做出反应,并能增加转化为电能的太阳光量。此外,PSC 具有柔性、半透明、可定制、轻质等特点,并且具有较高的功率转换效率(PCE)。本研究通过使用双分级光吸收剂/活性层和双包晶无铅材料 Cs$_{2}$BiAgI$_{6}$,力求提高 PSC 的效率。利用 SCAPS-1D 一维太阳能电池电容模拟器模拟了基于无铅双包晶石材料的太阳能电池的独特器件结构(ITO/ZnO/双包晶石 Cs$_{2}$BiAgI$_{6}$/CIGS/ 高纯度 Spiro-OMeTAD/Au )。这项工作优化了太阳能电池的输出参数,包括开路电压(Voc)为 1.2258 V,短路电流密度(Jsc)为 34.292 mA/cm$^{2}$,填充因子(FF)为 85.95$/%$,功率转换效率(PCE)为 36.13$/%$,接近单结 PSC 的肖克利-奎塞尔效率(SQ)极限。
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引用次数: 0
Signal-Processing Application Based on Ferroelectric Tunnel Field-Effect Transistor 基于铁电隧道场效应晶体管的信号处理应用
IF 2.1 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2024-07-01 DOI: 10.1109/TNANO.2024.3421263
Been Kwak;Daewoong Kwon;Hyunwoo Kim
This study introduces a ferroelectric tunnel field-effect transistor (Fe-TFET) capable of implementing three types of signal processing for frequency doubler, phase shifter, and signal follower. In addition, we verify its I/O characteristics using technology computer-aided design simulations. The proposed Fe-TFET has bidirectional tunneling currents as an inherent TFET characteristic, and the ferroelectric layer's polarization adjusts the device's threshold voltage (VTH). Depending on the degree of polarization by program voltage, the device operating within the input signal range of −0.5 to 0.5 V can be determined by the following current components: 1) source-to-channel tunneling current (ISC), 2) channel-to-drain currents (ICD), and 3) ISC and ICD. Then, through the mixed-mode circuit simulations, the I/O characteristics from each program condition are confirmed with 1) frequency doubler, 2) phase shifter, and 3) signal follower characteristics using a single Fe-TFET-based circuit. In addition, an investigation of the impact of frequency variations on the three modes reveals no attenuations in output signals. Consequently, the simple configuration and low power consumption, as opposed to conventional signal processing circuit, make the proposed processing method more suitable for analog circuit design.
本研究介绍了一种铁电隧道场效应晶体管(Fe-TFET),它能够实现倍频器、移相器和信号跟随器三种类型的信号处理。此外,我们还利用技术计算机辅助设计模拟验证了其输入/输出特性。拟议的 Fe-TFET 具有双向隧道电流这一 TFET 固有特性,铁电层的极化可调节器件的阈值电压 (VTH)。根据程序电压的极化程度,器件在-0.5 至 0.5 V 输入信号范围内的工作状态可由以下电流分量决定:1) 源极到沟道的隧道电流 (ISC);2) 沟道到漏极的电流 (ICD);3) ISC 和 ICD。然后,通过混合模式电路仿真,利用基于单个 Fe-TFET 电路的 1)倍频器、2)移相器和 3)信号跟随器特性,确认了每个程序条件下的 I/O 特性。此外,在研究频率变化对三种模式的影响时发现,输出信号没有衰减。因此,与传统的信号处理电路相比,拟议的处理方法配置简单、功耗低,更适合模拟电路设计。
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引用次数: 0
Core Reversal in Vertically Coupled Vortices: Simulation and Experimental Study 垂直耦合涡流中的核心逆转:模拟与实验研究
IF 2.1 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2024-06-28 DOI: 10.1109/TNANO.2024.3420249
Abbass Hamadeh;Abbas Koujok;Salvatore Perna;Davi R. Rodrigues;Alejandro Riveros;Vitaliy Lomakin;Giovanni Finocchio;Grégoire de Loubens;Olivier Klein;Philipp Pirro
This study conducts a comprehensive investigation into the reversal mechanism of magnetic vortex cores in a nanopillar system composed of two coupled ferromagnetic dots under zero magnetic field conditions. The research employs a combination of experimental and simulation methods to gain a deeper understanding of the dynamics of magnetic vortex cores. The findings reveal that by applying a constant direct current, the orientation of the vortex cores can be manipulated, resulting in a switch in one of the dots at a specific current value. The micromagnetic simulations provide evidence that this switch is a consequence of a deformation in the vortex profile caused by the increasing velocity of the vortex cores resulting from the constant amplitude of the trajectory as frequency increases. These findings offer valuable new insights into the coupled dynamics of magnetic vortex cores and demonstrate the feasibility of manipulating their orientation using direct currents under zero magnetic field conditions. The results of this study have potential implications for the development of vortex-based non-volatile memory technologies.
本研究对零磁场条件下由两个耦合铁磁点组成的纳米柱系统中磁性涡核的逆转机制进行了全面研究。研究采用了实验和模拟相结合的方法,以深入了解磁涡核的动力学特性。研究结果表明,通过施加恒定的直流电,可以操纵涡核的取向,从而使其中一个点在特定电流值下发生切换。微磁模拟提供的证据表明,这种切换是涡旋轮廓变形的结果,其原因是随着频率的增加,涡旋轨迹的恒定振幅导致涡旋核心的速度不断增加。这些发现为了解磁性涡核的耦合动力学提供了宝贵的新见解,并证明了在零磁场条件下使用直流操纵其方向的可行性。这项研究的结果对开发基于涡旋的非易失性存储器技术具有潜在的意义。
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引用次数: 0
IEEE Sensors Council 电气和电子工程师学会传感器理事会
IF 4.3 2区 综合性期刊 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2024-06-28 DOI: 10.1109/JSEN.2024.3415455
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引用次数: 0
Fully 3D Printed Miniaturized Electrochemical Platform With Plug-and-Play Graphitized Electrodes: Exhaustively Validated for Dopamine Sensing 完全 3D 打印的微型电化学平台,配有即插即用的石墨化电极:多巴胺传感的全面验证
IF 1.8 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-06-25 DOI: 10.1109/OJNANO.2024.3418840
K S Jaya Lakshmi;Ramya K;Khairunnisa Amreen;Sanket Goel
Globally, a contemporary trend is towards the realization of sustainable, eco-friendly, miniaturized, and cost-effective sensors. This work focuses on developing a plug-and-play device using inexpensive and biodegradable UV resin fed 3D printing stereolithography (SLA) to produce miniaturized microfluidic platforms for electrochemical sensing. The device consists of three compartments designed to accommodate the 3-electrodes according to the need. SLA 3D printing technique solves these restrictions, making sensors reliable, repeatable, and durable. For electrochemical detection at the point of need or as a lab-on-chip (LoC) platform with minimal sample volume, this work attempts to construct a flexible as well as non-flexible microelectrode setup. The analytical capability of the platform is examined by quantifying nanomolar levels of dopamine in human body fluids. Chronoamperometry and cyclic voltammetry on surface-treated graphene-poly lactic acid (g-PLA) microelectrodes modified with gold nanoparticles are carried out utilizing a handheld potentiostat. The designed device has a linear range of 0.1 to 120 nM with limit of detection and limit of quantification of 0.083 and 0.27 nM, respectively. Various electrode characterizations, including scanning electron microscopy, energy-dispersive X-ray spectroscopy, and electrochemical impedance spectroscopy are carried out. The developed device is finally tested for real-time analysis on human blood and serum samples.
在全球范围内,实现传感器的可持续、生态友好、微型化和成本效益是当今的发展趋势。这项工作的重点是开发一种即插即用的装置,利用廉价且可生物降解的 UV 树脂喂入 3D 打印立体光刻(SLA)技术,生产用于电化学传感的微型化微流控平台。该装置由三个隔间组成,可根据需要容纳 3 个电极。SLA 三维打印技术解决了这些限制,使传感器可靠、可重复、耐用。为了在需要时进行电化学检测,或将其作为具有最小样品体积的片上实验室(LoC)平台,这项工作尝试构建一个灵活和非灵活的微电极装置。通过量化人体液中纳摩尔水平的多巴胺,检验了该平台的分析能力。利用手持式恒电位仪对经表面处理的、用金纳米粒子修饰的石墨烯-聚乳酸(g-PLA)微电极进行了时程测量和循环伏安法测定。所设计的装置线性范围为 0.1 至 120 nM,检出限和定量限分别为 0.083 nM 和 0.27 nM。还进行了各种电极表征,包括扫描电子显微镜、能量色散 X 射线光谱和电化学阻抗光谱。最后对所开发的装置进行了测试,以便对人体血液和血清样本进行实时分析。
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引用次数: 0
News from Japan 日本新闻
IF 2.6 4区 工程技术 Q2 Engineering Pub Date : 2024-06-21 DOI: 10.1109/MEI.2024.10568083
Yoshimichi Ohki
As reported in this article in the preceding issue [1], many Japanese companies and universities are accelerating the development of power generation devices that use renewable energy sources. Continuing from [1], the research and development activities toward innovative solar cells being conducted by the Toshiba group are introduced in this article. At present, the most widely used solar cells for power generation use crystalline silicon. However, solar cells using silicon crystals need thick glass to prevent damage from hail and the like. Partly because of that, silicon solar cells are unbendable, thick, and heavy. This causes a shortage of adequate new places to install silicon solar cells, especially in densely populated cities. If flexible, thin, and light solar cells are developed at a reasonable price, we can use lots of places to generate electric power without adding much weight. Then, various surfaces such as curved roofs, walls, and windows of houses, buildings, and other objects with low load-bearing capacity, like cars and daily commodities, can be electric power generators. Even toys and clothes are usable.
正如本文在上一期[1]中所报道的,许多日本公司和大学正在加速开发使用可再生能源的发电设备。本文将继续[1]的报道,介绍东芝集团正在开展的创新太阳能电池研发活动。目前,最广泛使用的太阳能发电电池是晶体硅。然而,使用硅晶体的太阳能电池需要厚玻璃来防止冰雹等造成的损坏。部分原因在于,硅太阳能电池不可弯曲、厚且重。这就导致缺乏足够的新地方来安装硅太阳能电池,尤其是在人口稠密的城市。如果能以合理的价格开发出柔性、薄而轻的太阳能电池,我们就可以在不增加重量的情况下,在很多地方发电。那么,房屋、建筑物的弧形屋顶、墙壁和窗户等各种表面,以及汽车和日用品等其他承重能力低的物体,都可以成为发电装置。甚至玩具和衣服也可以使用。
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引用次数: 0
Bulletin Board: Call for Editorial Board 公告栏:征集编辑委员会成员
IF 2.6 4区 工程技术 Q2 Engineering Pub Date : 2024-06-21 DOI: 10.1109/MEI.2024.10566869
If you are excited to work together in a team of experts and help shape the content of IEEE Electrical Insulation Magazine (EIM), you may want to apply for a position on the editorial board. The Dielectrics and Electrical Insulation Society (DEIS) is now looking for two new board members, starting January 1, 2025.
如果您很高兴能与专家团队一起工作,并帮助制定 IEEE Electrical Insulation Magazine (EIM) 的内容,您可以申请编辑委员会的职位。电介质与电气绝缘学会(DEIS)现正在寻找两名新的董事会成员,任期从 2025 年 1 月 1 日开始。
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引用次数: 0
Bulletin Board: Third Thematic School on Dielectrics 公告栏:第三届电介质专题学校
IF 2.6 4区 工程技术 Q2 Engineering Pub Date : 2024-06-21 DOI: 10.1109/MEI.2024.10566872
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引用次数: 0
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