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Conference on Lasers and Electro-Optics (CLEO)

作者： Jacques Doumani Minhan Lou Oliver Dewey Nina Hong Jichao Fan Andrey Baydin Matteo Pasquali Yohei Yomogida Kazuhiro Yanagi Riichiro Saito Junichiro Kono Weilu Gao Department of Electrical and Computer Engineering Rice University Houston TX USA Applied Physics Graduate Program Smalley-Curl Institute Rice University Houston TX USA Department of Electrical and Computer Engineering The University of Utah Salt Lake City UT USA Carbon Hub Rice University Houston TX USA Department of Chemical and Biomolecular Engineering Rice University Houston TX USA J.A. Woollam Co. Lincoln NE USA The Smalley-Curl Institute Rice University Houston TX USA Department of Chemistry Rice University Houston TX USA Department of Materials Science and NanoEngineering Rice University Houston TX USA Department of Physics and Astronomy Tokyo Metropolitan University Tokyo Japan Department Physics Tohoku University Sendai Japan Department Physics and Astronomy Rice University Houston TX USA

We demonstrate tunable, giant, and structure-induced deep-ultraviolet circular dichroism in macroscopically chiral assemblies of racemic carbon nanotubes prepared using two approaches: mechanical-rotation-assisted vac... 详细信息

ISBN: (纸本)9781957171258

关键词： Carbon nanotubes Chiral media Dichroism Graphene Optical activity Quantum information

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Analysis of organic Rankine cycle based on thermal and exergy efficiency

Analysis of organic Rankine cycle based on thermal and exerg...

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2019 International Conference on Renewable Energy, ICORE 2019

作者： Eryanto, G. Pambudi, N.A. Wijayanto, D.S. Biddinika, M.K. Hijriawan, M. Kuncoro, I.W. Wibowo, K.M. Ma'Arif, M. Mechanical Engineering Education Universitas Sebelas Maret Surakarta Indonesia School of Environment and Society Tokyo Institute of Technology Japan Mechanical Engineering Department of Graduate Program Sebelas Maret University Surakarta Indonesia Physics Department of Graduate Program Sebelas Maret University Surakarta Indonesia

The binary power plant is a geothermal power generation system used at low to medium temperature levels and used indirect system. In this system, the heat generated from the reservoir is channelled to the secondary working fluid which has a lower boiling point than water using a heat exchanger. In this case, the Organic Rankine Cycle (ORC) is a suitable system for use. This improves the performance and efficiency of the plants. However, in this system, the installation configuration of the ORC model is an important factor that can affect its performance. The selection of an improper ORC design reduces the thermal efficiency of the system. Therefore, it cannot utilize heat optimally. In this study, engineering Equation Solution (EES) simulation program is used to run the system as in operation conditions. A comparative analysis is conducted using ORC, Regenerative ORC (RORC), and RORC with Internal Heat Exchanger (IHE). The results indicate that RORC with IHE has the greatest value for both energy (21.74%) and exergy efficiency (25.26%) while net power produced 5479 kW. This shows the addition of OFOH and IHE can increase these factors, improve performance and reduce energy degradation from the cycle. © Published under licence by IOP Publishing Ltd.

关键词： Rankine cycle

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Antimicrobial Photodynamic Effectiveness of Light Emitting Diode (Led) for Inactivation on Staphylococcus aureus Bacteria and Wound Healing in Infectious Wound Mice 3

Antimicrobial Photodynamic Effectiveness of Light Emitting D...

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3rd Annual Scientific Meeting on Medical physics and Biophysics, PIT-FMB in conjunction with the 17th South-East Asia Congress of Medical physics, SEACOMP 2019

作者： Astuti, S.D. Ardyana, Y. Arifianto, D. Winarno Puspita, P.S. Yuwana, Y.G.Y. Pradhana, A.A.S. Department of Physics Faculty of Sciences and Technology Airlangga University Surabaya Indonesia Biomedical Engineering Program Department of Physics Faculty of Sciences and Technology Airlangga University Surabaya Indonesia Faculty of Vocational Airlangga University Surabaya Indonesia

This study aims to determine the effectiveness of the antimicrobial photodynamic therapy (aPDT) LEDs of 392 nm and 628 nm red LEDs for photoinactivation on Staphylococcus aureus in vitro and the photodynamic effectiveness of therapy for wound healing in mice in vivo. The sample used was Staphylococcus aureus bacterial isolate which was infected on mice incision wounds. The LED exposure was carried out at the energy density of 19.44 J/cm2, respectively. In vitro test samples were divided into three groups, namely (P0): control group, (P1): LED treatment group 392 nm, (P2): LED treatment group 628 and (P3): LED combination treatment group 392 and 628 nm. In the in vivo test, the mice of infectious wound models were divided into 5 namely (M+): positive control group, (M-): negative control group, (M1): LED treatment group 392 nm, (M2): LED treatment group 628 and (M3): LED combination treatment group 392 and 628 nm. The results of in vitro studies showed an increase in the photoinactivation effect on LED exposure, with the effectiveness of inactivation on the LED 392 nm at 67.10%. The effect of photoinactivation of bacteria on wounds in vivo due to photodynamic therapy in the red LED exposure group was 88%, blue LED exposure group was 94%, exposure combination group of red and blue LEDs was 95%. So, the antimicrobial photodynamic therapy LEDs are effective for bacterial inactivation and accelerate wound healing in mice. © Published under licence by IOP Publishing Ltd.

关键词： Light emitting diodes

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3D Modelling of Iron Sand Using Geoelectrical Resistivity Method with Wenner Array in Ulakan Tapakis, Padang Pariaman, West Sumatra 4

3D Modelling of Iron Sand Using Geoelectrical Resistivity Me...

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4th International Conference on Research and Learning of physics, ICRLP 2021

作者： Octova, Adree Anaperta, Yoszi Mingsi Febriandika, Helio Gina Martinus, Herry Nazki, Admizal Razi, Pakhrur Putra, Amali Department of Mining Engineering Faculty of Engineering Universitas Negeri Padang Jl. Prof. Hamka Padang25131 Indonesia Department of Energy and Mineral Resources of West Sumatra Province Jl. Joni Anwar No.85 Kp. Lapai Nanggalo Padang25142 Indonesia Doctoral Program of Environmental Science Universitas Negeri Padang Jl. Prof Hamka Padang25131 Indonesia Center of Disaster Monitoring and Earth Observation Physics Department Universitas Negeri Padang Jl. Prof Hamka Padang25131 Indonesia Department of Physics Faculty of Mathematics and Natural Science Universitas Negeri Padang Jl. Prof Hamka No. 121 Padang25131 Indonesia

A studies using the resistivity method have been carried out to determine the potential of iron sand in Ulakan Tapakis West Sumatra. This study aims to establish the potential 3D modelling of iron sand. Wenner array is used to determine location of anomalies by taking 5 sections which has 180 meter length. The distance of the electrode used is 3.9 meters. Generally, Ulakan Tapakis has 3 main components of alluvial deposits, namely a layer of top sand (upper sand), middle sand, and a layer of iron sand which is divided into 2 layers, namely the bottom sand and the iron sand layer which has a resistivity value ranging from 9.53 -14135 ωm. These layers have different resistivity values depending on the constituent material. The existance of iron sand is located at depths of 0-6 meter below sea surface, with range of resistivity is 9.53-1000 ωm. © Published under licence by IOP Publishing Ltd.

关键词： Sand

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Ferroelectric transistors based on shear-transformation-mediated rhombohedral-stacked molybdenum disulfide

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Nature Electronics 2024年第1期7卷 29-38页

作者： Yang, Tilo H. Liang, Bor-Wei Hu, Hsiang-Chi Chen, Fu-Xiang Ho, Sheng-Zhu Chang, Wen-Hao Yang, Liu Lo, Han-Chieh Kuo, Tzu-Hao Chen, Jyun-Hong Lin, Po-Yen Simbulan, Kristan Bryan Luo, Zhao-Feng Chang, Alice Chinghsuan Kuo, Yi-Hao Ku, Yu-Seng Chen, Yi-Cheng Huang, You-Jia Chang, Yu-Chen Chiang, Yu-Fan Lu, Ting-Hua Lee, Min-Hung Li, Kai-Shin Wu, Menghao Chen, Yi-Chun Lin, Chun-Liang Lan, Yann-Wen Department of Physics National Taiwan Normal University Taipei Taiwan Taiwan Semiconductor Research Institute National Applied Research Laboratories Hsinchu Taiwan Department of Electrophysics National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Physics National Cheng Kung University Tainan Taiwan School of Physics Huazhong University of Science and Technology Wuhan China Institute of Cellular and Organismic Biology Academia Sinica Taipei Taiwan Department of Mathematics and Physics University of Santo Tomas Manila Philippines Program for Semiconductor Devices Materials and Hetero-integration Graduate School of Advanced Technology National Taiwan University Taipei Taiwan Hsinchu Taiwan Department of Physics National Taiwan University Taipei Taiwan Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA United States

To develop low-power, non-volatile computing-in-memory device using ferroelectric transistor technologies, ferroelectric channel materials with scaled thicknesses are required. Two-dimensional semiconductors, such as molybdenum disulfide (MoS2), equipped with sliding ferroelectricity could provide an answer. However, achieving switchable electric polarization in epitaxial MoS2 remains challenging due to the absence of mobile domain boundaries. Here we show that polarity-switchable epitaxial rhombohedral-stacked (3R) MoS2 can be used as a ferroelectric channel in ferroelectric memory transistors. We show that a shear transformation can spontaneously occur in 3R MoS2 epilayers, producing heterostructures with stable ferroelectric domains embedded in a highly dislocated and unstable non-ferroelectric matrix. This diffusionless phase transformation process produces mobile screw dislocations that enable collective polarity control of 3R MoS2 via an electric field. Polarization–electric-field measurements reveal a switching field of 0.036 V nm−1 for shear-transformed 3R MoS2. Our sliding ferroelectric transistors are non-volatile memory units with thicknesses of only two atomic layers and exhibit an average memory window of 7 V with an applied voltage of 10 V, retention times greater than 104 seconds and endurance greater than 104 cycles. © 2023, The Author(s), under exclusive licence to Springer Nature Limited.

关键词： Molybdenum disulfide

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Development of an HV-CMOS active pixel sensor "AstroPix" for all-sky medium-energy gamma-ray telescopes 38

Development of an HV-CMOS active pixel sensor "AstroPix" for...

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38th International Cosmic Ray Conference, ICRC 2023

作者： Suda, Yusuke Caputo, Regina Steinhebel, Amanda L. Fleischhack, Henrike Striebig, Nicolas Jadhav, Manoj Luz, Ricardo Violette, Daniel Kierans, Carolyn Tajima, Hiroyasu Fukazawa, Yasushi Leys, Richard Peric, Ivan Metcalfe, Jessica Negro, Michela Perkins, Jeremy S. Physics Program Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima739-8526 Japan NASA Goddard Space Flight Center GreenbeltMD United States Catholic University of America 620 Michigan Ave NE WashingtonDC20064 United States Center for Research and Exploration in Space Science and Technology NASA/GSFC GreenbeltMD20771 United States ASIC and Detector Laboratory Karlsruhe Institute of Technology Karlsruhe Germany Argonne National Laboratory LemontIL60440 United States Institute for Space Earth Environmental Research Kobayashi-Maskawa Institute for The Origin of Particles and the Universe Nagoya University Japan

All-sky medium-energy gamma-ray observations are essential to deepen our understanding of physics in extreme astronomical objects such as gamma-ray bursts and active galactic nuclei. Those observations are also highly needed to further develop multi-messenger astronomy. Next-generation all-sky MeV gamma-ray telescopes must have a large area detector and keep high sensitivities even in the energies in which Compton scattering is dominant. Having both a silicon tracker (scatterer) and a calorimeter (absorber) as the main detector is a promising configuration for such a space mission. In order to fulfill the requirements such as a large sensitive area, low noise, high energy/positional resolution, and low power, we have been developing an HV-CMOS active pixel sensor, AstroPix. In this contribution, we report performance evaluations of AstroPix such as I-V and noise, energy calibration/resolution/threshold, and depletion depth measurements. Current achievements as a sensor for next-generation all-sky MeV gamma-ray telescopes and future development will be discussed. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： CMOS integrated circuits

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Wafer-scale transfer route for top–down III-nitride nanowire LED arrays based on the femtosecond laser lift-off technique

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Microsystems & Nanoengineering 2021年第2期7卷 205-219页

作者： Nursidik Yulianto Andam Deatama Refino Alina Syring Nurhalis Majid Shinta Mariana Patrick Schnell Ruri Agung Wahyuono Kuwat Triyana Florian Meierhofer Winfried Daum Fatwa F.Abdi Tobias Voss Hutomo Suryo Wasisto Andreas Waag Institute of Semiconductor Technology(IHT) Technische Universität BraunschweigHans-Sommer-Straße 66Braunschweig38106Germany Laboratory for Emerging Nanometrology(LENA) Technische Universität BraunschweigLanger Kamp 6Braunschweig38106Germany Research Center for Physics Indonesian Institute of Sciences(LIPI)Jl.Kawasan Puspiptek No.441-442TangerangSelatan15314Indonesia Engineering Physics Program Institut Teknologi Sumatera(ITERA)Jl.Terusan RyacuduWay HuwiLampung SelatanLampung35365Indonesia Institute of Energy Research and Physical Technologies Technische Universität ClausthalLeibnizstraße 4Clausthal-Zellerfeld38678Germany Institute for Solar Fuels Helmholtz-Zentrum Berlin für Materialien und Energie GmbHHahn-Meitner-Platz 1Berlin14109Germany Department of Engineering Physics Institut Teknologi Sepuluh Nopember(ITS)Jl.Arif Rahman HakimITS Campus SukoliloSurabaya60111Indonesia Department of Physics Faculty of Mathematics and Natural SciencesUniversitas Gadjah MadaSekip Utara PO Box BLS 21Yogyakarta55281Indonesia

The integration of gallium nitride(GaN)nanowire light-emitting diodes(nanoLEDs)on flexible substrates offers opportunities for applications beyond rigid solid-state lighting(e.g.,for wearable optoelectronics and bendable inorganic displays).Here,we report on a fast physical transfer route based on femtosecond laser lift-off(fs-LLO)to realize wafer-scale top–down GaN nanoLED arrays on unconventional *** with photolithography and hybrid etching processes,we successfully transferred GaN blue nanoLEDs from a full two-inch sapphire substrate onto a flexible copper(Cu)foil with a high nanowire density(~107 wires/cm2),transfer yield(~99.5%),and *** nanoanalytical measurements were conducted to evaluate the performance and limitations of the fs-LLO technique as well as to gain insights into physical material properties such as strain relaxation and assess the maturity of the transfer *** work could enable the easy recycling of native growth substrates and inspire the development of large-scale hybrid GaN nanowire optoelectronic devices by solely employing standard epitaxial LED wafers(i.e.,customized LED wafers with additional embedded sacrificial materials and a complicated growth process are not required).

关键词： sapphire transfer lighting

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Low-Temperature Synthesis of Weakly Confined Carbyne inside Single-Walled Carbon Nanotubes

arXiv

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arXiv 2024年

作者： Zhang, Bo-Wen Qiu, Xi-Yang Ma, Yicheng Hu, Qingmei Fitó-Parera, Aina Kohata, Ikuma Feng, Ya Zheng, Yongjia Zhang, Chiyu Matsuo, Yutaka Wang, YuHuang Chiashi, Shohei Otsuka, Keigo Xiang, Rong Levshov, Dmitry I. Cambré, Sofie Wenseleers, Wim Rotkin, Slava V. Maruyama, Shigeo Department of Mechanical Engineering The University of Tokyo Tokyo113-8656 Japan State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical Engineering Zhejiang University Hangzhou310027 China Theory and Spectroscopy of Molecules and Materials Department of Physics University of Antwerp Antwerp2610 Belgium Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education School of Energy and Power Engineering Dalian University of Technology Liaoning 116024 China Department of Chemistry and Biochemistry Chemical Physics Program Maryland Nano Center University of Maryland College ParkMD20742 United States Department of Chemical Systems Engineering Graduate School of Engineering Nagoya University Nagoya464-8603 Japan Institute of Materials Innovation Institutes for Future Society Nagoya University Nagoya464-8603 Japan Theory and Spectroscopy of Molecules and Materials Department of Chemistry University of Antwerp Antwerp2610 Belgium Nanostructured and Organic Optical and Electronic Materials Department of Physics University of Antwerp Antwerp2610 Belgium Materials Research Institute Department of Engineering Science & Mechanics The Pennsylvania State University University ParkPA16802 United States

Carbyne, a one-dimensional (1D) carbon allotrope with alternating triple and single bonds, has the highest known mechanical strength but is unstable to bending, limiting synthesis to short linear chains. Encapsulation within carbon nanotubes (CNTs) stabilizes carbyne, forming confined carbyne (CC), thus enabling further research concerning attractive 1D physics and materials properties of carbyne. While CC has been synthesized in multi-walled CNTs (MWCNTs) using the arc-discharge method and in double-walled CNTs (DWCNTs) via high-temperature high-vacuum (HTHV) method, synthesis in single-walled CNTs (SWCNTs) has been challenging due to their fragility under such conditions. In this work, we report a low-temperature method to synthesize CC inside SWCNTs (CC@SWCNT). By annealing SWCNTs containing ammonium deoxycholate (ADC) at 400°C, ADC is converted into CC without damaging the SWCNTs. Raman spectroscopy revealed a strong CC phonon (CC-mode) peak at 1860–1870 cm-1, much stronger than the SWCNT G-band peak, confirming a high fraction of CC in the resulting material. The Raman mapping result showed the uniformity of the CC-mode signal across the entire film sample, proving the high efficiency of this method in synthesizing CC in every SWCNT of appropriate size. Notably, the CC-mode peaks of CC@SWCNT (above 1860 cm-1) are higher than those reported in previous CC@CNT samples (mostly -1). This is attributed to larger SWCNT diameters (>0.95 nm) used in this study, compared to the typical 0.6–0.8 nm range. Larger diameters result in reduced confinement, allowing carbyne to closely resemble free-standing carbyne while remaining stabilized. This low-temperature synthesis of long-chain, nearly freestanding carbyne within large-diameter SWCNTs offers new opportunities for exploring 1D physics and the unique properties of carbyne for potential applications. © 2024, CC BY-NC-ND.

关键词： Single-walled carbon nanotubes (SWCN)

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Gelatine-Based Phantom For Simulating A-Line Reverberations in Lung Ultrasonogram

Gelatine-Based Phantom For Simulating A-Line Reverberations ...

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International Conference on Instrumentation Control and Automation (ICA)

作者： Citra Alfa Nabila Saeful Bahri Damar Rastri Adhika Suprijanto Suprijanto Master Program of Instrumentation and Control Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia Doctoral Program of Engineering Physics Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia Advanced Functional Material Research Group Faculty of Industrial Technology Research Center of Nanosciences and Nanotechnology Institut Teknologi Bandung Bandung Indonesia Instrumentation and Control Research Group Faculty of Industrial Technology Institute Teknologi Bandung Bandung Indonesia

To understand typical features that could be imaged using ultrasonography (USG) in the training phases of medical students or practitioners, a lung phantom is required. The research team suggests using a gelatine-based phantom to demonstrate A-line reverberations in lung ultrasound. The ordinary gelatine-based phantom has the disadvantage of being too fragile and prone to breaking. The specific process was attempted on gelatine with a plasticizer and carrier agent to increase the gelatine's strength and elasticity. To simulate the A-lines, two different textures of gelatine layers are used, with other processes in between. A special procedure was used to set off the various acoustic impedances affecting reverberation physics with those varied textures. Based on USG image analysis, the proposed lung phantom material has some advantages: it is inexpensive and easy to find, despite its complicated procedures. Furthermore, it could be processed to have the desired properties and recycled after hardening with water bath melting.

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Utilizing probabilistic entanglement between sensors in quantum networks

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Physical Review Applied 2024年第6期22卷 064085-064085页

作者： Emily A. Van Milligen Christos N. Gagatsos Eneet Kaur Don Towsley Saikat Guha Department of Physics The University of Arizona 1630 East University Boulevard Tucson Arizona 85721 USA Department of Electrical and Computer Engineering The University of Arizona 1630 East University Boulevard Tucson Arizona 85721 USA Wyant College of Optical Sciences The University of Arizona 1630 East University Boulevard Tucson Arizona 85721 USA Program in Applied Mathematics The University of Arizona Tucson Arizona 85721 USA Cisco Quantum Lab Los Angeles USA College of Computer Science University of Massachusetts Amherst Massachusetts USA Department of Electrical and Computer Engineering The University of Maryland College Park Maryland 20742 USA

One of the most promising applications of quantum networks is entanglement-assisted sensing. The field of quantum metrology exploits quantum correlations to improve the precision bound for applications such as precision timekeeping, field sensing, and biological imaging. When measuring multiple spatially distributed parameters, current literature focuses on quantum entanglement in the discrete-variable case and quantum squeezing in the continuous-variable case, distributed amongst all of the sensors in a given network. However, it can be difficult to ensure that all sensors preshare entanglement of sufficiently high fidelity. This work probes the space between fully entangled and fully classical sensing networks by modeling a star network with probabilistic entanglement generation that is attempting to estimate the average of local parameters. The quantum Fisher information is used to determine which protocols best utilize entanglement as a resource for different network conditions. It is shown that without entanglement distillation there is a threshold fidelity below which classical sensing is preferable. For a network with a given number of sensors and links characterized by a certain initial fidelity and probability of success, this work outlines when and how to use entanglement, when to store it, and when it needs to be distilled.

关键词： Quantum entanglement

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