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2022 Device Research Conference, DRC 2022

作者： Lin, Kenneth Prasad, Nitin Burg, G. William Watanabe, Kenji Taniguchi, Takashi Tutuc, Emanuel University of Texas at Austin Department of Electrical and Computer Engineering AustinTX78758 United States National Institute of Materials Science Research Center for Functional Materials Ibaraki305-0044 Japan National Institute of Materials Science International Center for Materials Nanoarchitectonics Ibaraki305-0044 Japan

ISBN: (数字)9781665498838

ISBN: (纸本)9781665498838

Van der Waals heterostructures of two-dimensional (2D) crystals are a versatile platform for electron physics and device applications. An emerging device that departs markedly from the field-effect transistor, and has shown potential applications for logic [1], memory [2], and security [3] is the interlayer resonant tunneling field-effect transistor (ITFET), consisting of two independently contacted 2D layers separated by a tunnel barrier. In such devices, energy and momentum conservation during tunneling leads to interlayer voltage-current characteristics with gate-tunable negative differential resistance (NDR). ITFET demonstrations include single-gated double monolayer or double bilayer graphene separated by hexagonal boron-nitride (hBN) [4]-[5], dual-gated double bilayer graphene separated by WSe2 [6], and dual-gated double WSe2 separated by hBN barriers [7]. Here, we present a combined experimental and modeling study of dual-gated double monolayer graphene-hBN heterostructures, where the crystals axes of the two graphene electrodes are rotationally aligned, thereby enabling resonant tunneling and gate-tunable NDR. © 2022 IEEE.

关键词： Monolayers

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

Numerical Investigation of Si Nanowires Integrated Perovskit...

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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

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Integrating Sustainability and Industry 4.0: A Framework for Sustainable Logistics 4.0

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Circular Economy and Sustainability 2025年 1-39页

作者： Di Nardo, Mario Gallab, Maryam Murino, Teresa Wu, Jing Pandey, Shatrudhan Facoltàdi Ingegneria Università Telematica Pegaso Rome 00186 Italy MIS-LISTD Laboratory Computer Science Department Mines-Rabat School (ENSMR) Rabat 10000 Morocco Department of Chemical Materials and Industrial Production Engineering University of Naples “Federico II” Naples Italy Department of Electrical and Photonics Engineering Technical University of Denmark Kgs. Lyngby 2800 Denmark Marwadi University Research Center Faculty of Management Studies Marwadi University Gujarat Rajkot 360003 India

As society becomes more aware of environmental and social issues, supply chain stakeholders increasingly consider these factors alongside efficiency, cost, and time. The logistics industry must adapt by integrating Industry 4.0 technologies and sustainability practices. Sustainable Logistics 4.0, though nascent, is gaining traction for enhancing sustainability through digital interventions. This study conducted a comprehensive literature review and bibliometric network analysis using data extracted from the Scopus and Google Scholar databases, covering the period from 2013 to 2023, focusing on the integration of sustainability, Industry 4.0, and logistics. Noting a gap in conceptual frameworks, the paper performs a SWOT analysis to identify key factors and proposes a framework for digitalizing sustainable logistics and addressing emerging challenges. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2025.

关键词： Circular Economy Industry 4.0 Logistics Sustainability TBL

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Localization of Crop Damages Utilizing a Wake-Up Gas Sensor Network 22

Localization of Crop Damages Utilizing a Wake-Up Gas Sensor ...

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22nd International Conference on Solid-State Sensors, Actuators and Microsystems, Transducers 2023

作者： Noh, Seungbeom Tope, Sayali Sium, Farhan Sadik Khan, Shakir-Ul Haque Karkhanis, Mohit Wang, Leo Deshpande, Adwait Dalapati, Rana Mural, Ravi V. Mastrangelo, Carlos H. Ji, Mingyu Zang, Ling Schnable, James C. Kim, Hanseup University Of Utah Electrical And Computer Engineering Salt Lake CityUT84112 United States University Of Utah Materials Science And Engineering Salt Lake CityUT84112 United States University Of Nebraska Department Of Agronomy And Horticulture LincolnNE68588 United States

ISBN: (纸本)9784886864352

This paper reports the initial demonstration of on-field crop damage prediction through a network of low power gas sensors that were deployed in an actual sorghum field and detected crop stress molecules, specifically hexanal. Such detection could replace current farm-scouting methods that are mostly manual and help reduce production loss of biofuel crops during a farming period. The initially-deployed gas sensor network consisted of a 2×3 array with a 7-meter interspace. When the leaves of sorghums were cut at a random location within the network, three sensors in the gas sensor network responded at 45, 62, and 72 minutes, respectively, allowing us to estimate an origination zone within an area of 21.7 m2 out of the total monitoring farm area of 294 m2. This demonstration proves the potential of precise localization of plant damages through the use of the gas sensor network. © 2023 IEEJ.

关键词： biofuel and sorghum gas sensor network Localization of crop damage smart farming

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Picosecond optical-to-x-ray (Cd,Mg)Te radiation detectors

Picosecond optical-to-x-ray (Cd,Mg)Te radiation detectors

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Cheng, J. Komissarov, I. Chen, G. Chakraborty, D. Kutcher, S. Chen, H. Trivedi, S. Sobolewski, Roman Materials Science Graduate Program University of Rochester RochesterNY14627 United States Laboratory for Laser Energetics University of Rochester RochesterNY14623 United States Department of Electrical and Computer Engineering University of Rochester RochesterNY14627 United States Brimrose Technology Corp SparksMD21152 United States

We developed a dual optical/x-ray ultrafast photodetector based on in-house grown Cdo * Mg0.03Te single crystals. The detector is characterized by ~200 ps full-width-at-half-maximum, readout-electronics limited photor... 详细信息

ISBN: (纸本)9781957171258

关键词： X ray detectors

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Challenges of measuring spin Seebeck noise

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Physical Review B 2024年第10期109卷 104429-104429页

作者： Renjie Luo Xuanhan Zhao Tanner J. Legvold Liyang Chen Changjiang Liu Deshun Hong Anand Bhattacharya Douglas Natelson Department of Physics and Astronomy Rice University Houston Texas 77005 USA Applied Physics Program Smalley-Curl Institute Rice University Houston Texas 77005 USA Materials Science Division Argonne National Laboratory Lemont Illinois 60439 USA Department of Electrical and Computer Engineering Rice University Houston Texas 77005 USA Department of Materials Science and NanoEngineering Rice University Houston Texas 77005 USA

Just as electronic shot noise in driven conductors results from the granularity of charge and the statistical variation in the arrival times of charge carriers, there are predictions for fundamental noise in magnon currents due to angular momentum being carried by discrete excitations. The inverse spin Hall effect as a transduction mechanism to convert spin current into charge current raises the prospect of experimental investigations of such magnon shot noise. Spin Seebeck effect measurements have demonstrated the electrical detection of thermally driven magnon currents and have been suggested as an avenue for accessing spin current fluctuations. Using spin Seebeck structures made from yttrium iron garnet on gadolinium gallium garnet, we demonstrate the technical challenges inherent in such noise measurements. While there is a small increase in voltage noise in the inverse spin Hall detector at low temperatures associated with adding a magnetic field, the dependence on field orientation implies that this is not due to magnon shot noise. We describe theoretical predictions for the expected magnitude of magnon shot noise, highlighting ambiguities that exist. Further, we show that magnon shot noise detection through the standard inverse spin Hall approach is likely impossible due to geometric factors. Implications for future attempts to measure magnon shot noise are discussed.

关键词： Spin Seebeck effect Spin current Magnetic insulators Noise measurements

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Microfabricated polymer-metal biosensors for multifarious data collection from electrogenic cellular models

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Microsystems & Nanoengineering 2023年第2期9卷 167-180页

作者： Charles M.Didier Julia F.Orrico Omar S.Cepeda Trres Jorge Manrique Castro Aliyah Baksh Swaminathan Rajaraman NanoScience Technology Center University of Central Florida4353 Scorpius StreetResearch ISuite 231FL 32816 OrlandoUSA Burnett School of Biomedical Sciences University of Central Florida6900 Lake Nona BlvdFL 32827 OrlandoUSA Department of Biomedical Engineering Polytechnic University of Puerto Rico37700918Ponce de LeonSan JuanPuerto Rico Department of Electrical and Computer Engineering University of Central Florida4238 Scorpius StreetFL 32816 OrlandoUSA Department of Materials Science and Engineering University of Central Florida12760 Pegasus DriveEngineering ISuite 207FL 32816 OrlandoUSA

Benchtop tissue cultures have become increasingly complex in recent years,as more on-a-chip biological technologies,such as microphysiological systems(MPS),are developed to incorporate cellular constructs that more accurately represent their respective biological *** MPs have begun facilitating major breakthroughs in biological research and are poised to shape the field in the coming *** biological systems require integrated sensing modalities to procure complex,multiplexed datasets with unprecedented combinatorial biological *** this work,we expanded upon our polymer-metal biosensor approach by demonstrating a facile technology for compound biosensing that was characterized through custom modeling *** reported herein,we developed a compound chip with 3D microelectrodes,3D microfluidics,interdigitated electrodes(IDEs)and a *** chip was subsequently tested using the electrical/electrochemical characterization of 3D microelectrodes with 1 kHz impedance and phase recordings and IDE-based high-frequency(-1 MHz frequencies)impedimetric analysis of differential localized temperature recordings,both of which were modeled through equivalent electrical circuits for process parameter ***,a simplified antibody-conjugation strategy Was employed for a similar IDE-based analysis of the implications of a key analyte(L-glutamine)binding to the equivalent electrical ***,acute microfluidic perfusion modeling was performed to demonstrate the ease of microfluidics integration into such a polymer-metal biosensor platform for potential complimentary localized chemical ***,our work demonstrates the design,development,and characterization of an accessibly designed polymer-metal compound biosensor for electrogenic cellular constructs to facilitate comprehensive MPS data collection.

关键词： polymer recording breakthrough

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Improving the Cooling Time of Twisted Coiled Actuators in Soft Robotics

Improving the Cooling Time of Twisted Coiled Actuators in So...

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IEEE/RAS-EMBS International Conference on Biomedical Robotics and Biomechatronics (BioRob)

作者： Alex Lizotte Parisa Daemi Brendan DiFabio Ana Luisa Trejos School of Biomedical Engineering (BME) Western University BME Western University Department of Electrical and Computer Engineering (ECE) Department of Mechanical and Materials Engineering Mechatronics Program Western University ECE and BME Western University

ISBN: (数字)9798350386523

ISBN: (纸本)9798350386530

Fabric cooling channels for twisted coiled actuators (TCAs) were recently proposed to achieve the required response times for motion assistance in a manner suitable for soft wearable robotic devices. While previous work demonstrated that the fabric channel reduced the cooling time by 42% in comparison to the same TCA without the cooling channel, the TCAs were still not cooled quickly enough to support human motion. Therefore, in this paper, two variations to the channel are proposed to further reduce the cooling time of the TCAs. The variations include unsealing the inlet and adding vents along the length of the channel to take advantage of air entrainment and natural convection. While both variations reduced the cooling time on their own, when they were employed together there was a 34% reduction in cooling time compared to the original channel design ( $19.1 \pm 2.4\ \mathrm{s}$ vs. $13.5 \pm 0.9\ \mathrm{s}, \mathrm{p} < 0.001$ ). This decrease occurred without any significant differences in the stroke or heating time of the TCA. The modified channel was then compared to the TCA without the cooling apparatus and the cooling time was reduced by 57% ( $25.1 \pm 1.7\ \mathrm{s}$ vs. $14.0 \pm 1.2\ \mathrm{s}, \mathrm{p} < 0.001)$ . This work advances the development of a cooling system for TCAs, making it suitable for soft wearable robotic devices by improving portability, and thereby enabling their use in wearable devices for rehabilitation applications.

关键词： Heating systems Actuators Cooling Vents Soft robotics Fabrics Time factors Wearable devices Convection Testing

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Reconfiguration and Millimeter-Wave Transmission Properties of Heat-Treated Self-Assembled Helices

Reconfiguration and Millimeter-Wave Transmission Properties ...

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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

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AlN/GaN/AlN HEMTs on Bulk AlN Substrates with High Drain Current Density > 2.8 A/mm and Average Breakdown Field > 2 MV/cm

AlN/GaN/AlN HEMTs on Bulk AlN Substrates with High Drain Cur...

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Device Research Conference

作者： Eungkyun Kim Yu-Hsin Chen Jimy Encomendero Debdeep Jena Huili Grace Xing School of Electrical and Computer Engineering Cornell University Ithaca New York USA Department of Materials Science and Engineering Cornell University Ithaca New York USA

ISBN: (数字)9798350373738

ISBN: (纸本)9798350373745

Wide energy bandgap and high saturation velocity of GaN have played a pivotal role in increasing the output power density ( P out ) of a radio frequency (RF) transistor, allowing for an increased radar and communication system range. A further improvement in output power densities of GaN HEMTs is currently thermally limited due to the waste heat generated during the device operation in the channel layer. Therefore, to realize reliable and sustained operation at high P out , thermal management in GaN HEMTs must be improved. We present AlN/GaN/AlN HEMTs, where an AlN buffer layer is homoepitaxially grown on bulk AlN substrates. In this heterostructure, AlN simultaneously offers an ultra-wide energy bandgap (~6.1 eV) and high thermal conductivity (340 W/m·K) [1] ; the thermal advantage of an AlN buffer layer in HEMTs grown on SiC substrates has been recently confirmed by Soctera [2] . AlN homoepitaxy employed in our heterostructure further improves the thermal performance by potentially eliminating the thermal boundary resistance at the growth interface [3] . To this end, we report the on-current and breakdown behavior of HEMTs grown on Al-polar bulk AlN for the first time after the dramatically improved AlN homoepitaxy by MBE [4] .

关键词： Photonic band gap Electric breakdown Thermal resistance HEMTs Thermal conductivity III-V semiconductor materials MODFETs

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