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Physical Review B 2022年第24期105卷 245412-245412页

作者： Haifeng Hu Qiaoqiang Gan Qiwen Zhan School of Optical-Electrical and Computer Engineering University of Shanghai for Science and Technology Shanghai 200093 China Zhangjiang Laboratory 100 Haike Road Shanghai 201204 China Shanghai Key Lab of Modern Optical System University of Shanghai for Science and Technology Shanghai 200093 China Material Science Engineering King Abdullah University of Science and Technology Thuwal 23955-6900 Kingdom of Saudi Arabia

The chirality-dependent asymmetric light-matter interaction can be enhanced using various artificial photonic structures as well as engineered incident field. Compared with chiral photonic structures, the engineered optical field is less explored and recently recognized as a new regime in tailoring light-matter interaction. In this work, we demonstrate that weakly chiral spheres can exhibit the maximum scattering circular dichroism (CD) by tailoring the incident field to construct chirality-sensitive anapole states. By considering the chiral terms radiated from Mie nanospheres as perturbation, a multiscattering model is established to predict the chiroptical Mie scattering response of these nanospheres. This model provides a specific guideline to tailor the incident field to realize the upper limit of the achievable scattering CD.

关键词： Chirality Mie scattering Photonics

Scalable Production and Supply Chain of Diamond using Microwave Plasma: a Mini-review

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arXiv 2023年

作者： Baryshev, Sergey V. Muehle, Matthias Department of Electrical and Computer Engineering Michigan State University MI48824 United States Department of Chemical Engineering and Material Science Michigan State University MI48824 United States Fraunhofer USA Inc. Center Midwest East LansingMI48824 United States

Discovered and reported exactly 40 years ago, microwave plasma assisted chemical vapor deposition (MPACVD) pointed out an economic technology that could potentially produce lab-grown diamond stones at scale. After this breakthrough discovery, demonstrating that diamond can be growth at low pressure and temperature, the progress quickly curbed and synthetic single crystal diamond (SCD) size and quality could not be improved toward attaining requirements critical in solid-state electronics. This led to the early promise of MPACVD to not come true and slowed the level of investments, thereby further stalling the progress in diamond syntheses. With the invention of a few novel homo- and hetero-epitaxy growth techniques, the diamond research and technology has recently reinvigorated. This mini review attempts to capture the momentum of recent progress in diamond MPACVD that could finally bring scalable manufacturing of high quality large size wafers for future electronics and optics. © 2023, CC BY-NC-SA.

关键词： Supply chains

Effect of In-Situ Zn Doping on Suppression of Phase Separation in in X Al1− X as Epitaxial Layer on Inp(001) Grown by Mocvd

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SSRN

SSRN 2023年

作者： Jang, Hyunchul Lee, Sang Tae Song, Chang-Hun Kong, Minwoo Shim, Jae-Phil Shin, Seung Heon Song, Keun Man Choi, Yong-Su Kim, Donghyun Park, Kyong-Ho Shin, Chan-Soo Korea Republic of Department of Material Science and Engineering Yonsei University Korea Republic of Department of Electrical and Computer Engineering Inter-university Semiconductor Research Center Seoul National University Korea Republic of Department of Semiconductor Process Equipment Semiconductor Convergence Campus Korea Polytechnics Korea Republic of

The effect of Zn impurities on the surface morphology evolution and phase separation behavior of the InAlAs layer on InP(001) substrates is investigated using metal organic chemical vapor deposition (MOCVD). The phase... 详细信息

关键词： Surface morphology

Growth of α-Ga2O3 on α-Al2O3 by conventional molecular-beam epitaxy and metal-oxide-catalyzed epitaxy

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arXiv 2023年

作者： McCandless, J.P. Protasenko, V. Rowe, D. Pieczulewski, N. Alonso-Orts, M. Williams, M.S. Eickhoff, M. Xing, H.G. Muller, D.A. Jena, D. Vogt, P. School of Electrical and Computer Engineering Cornell University IthacaNY14853 United States Department of Material Science and Engineering Cornell University IthacaNY14853 United States Institute of Solid-State Physics University Bremen Otto-Hahn-Allee 1 Bremen28359 Germany Department of Material Science and Engineering Cornell University IthacaNY14853 United States Kavli Institute Cornell for Nanoscale Science Cornell University IthacaNY14853 United States Kavli Institute Cornell for Nanoscale Science Cornell University IthacaNY14853 United States School of Applied and Engineering Physics Cornell University IthacaNY14853 United States School of Electrical and Computer Engineering Cornell University IthacaNY14853 United States

We report the growth of α-Ga2O3 on m-plane α-Al2O3 by conventional plasma-assisted molecular-beam epitaxy (MBE) and In-mediated metal-oxide-catalyzed epitaxy (MOCATAXY). We report a growth-rate-diagram for α-Ga2O3(1010 ¯ ), and observe (i) a growth rate increase, (ii) an expanded growth window, and (iii) reduced out-of-lane mosaic spread when MOCATAXY is employed for the growth of α-Ga2O3. Through the use of In-mediated catalysis, growth rates over 0.2 μm hr−1 and rocking curves with full width at half maxima of ∆ω ≈ 0.45◦ are achieved. Faceting is observed along the α-Ga2O3film surface and is explored through scanning transmission electron microscopy. © 2023, CC BY-NC-ND.

关键词： Gallium compounds

Magnetic nanotechnologies for early cancer diagnostics with liquid biopsies:a review

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Journal of Cancer Metastasis and Treatment 2020年第1期6卷 188-208页

作者： Diqing Su Kai Wu Renata Saha Jinming Liu Jian-Ping Wang Department of Chemical Engineering and Material Science University of MinnesotaMinneapolisMN 55455USA Department of Electrical and Computer Engineering University of MinnesotaMinneapolisMN 55455USA

Liquid biopsy has become an emerging technology in the detection of cancer related biomarkers as well as the continuous monitoring of cancer *** has been extensive research on the applications of magnetic nanotechnologies in liquid biopsies from the separation of target analytes to the detection of cancer *** separation plays an important role in increasing both the efficiency and sensitivity of the liquid biopsy *** detection of cancer biomarkers through magnetic nanosensors also possesses many advantages such as low background noise,high sensitivity,short assay time,and the ability to detect multiple biomarkers at the same *** review focuses on the recent advances of magnetic nanotechnologies in liquid biopsies for cancer detection and its future potential in comparison with other technologies.

关键词： Liquid biopsy magnetic cancer nanotechnology biosensor

Phase Change Induced Magnetic Switching through Metal-insulator Transition in VO2/TbFeCo Films

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arXiv 2023年

作者： Ma, Chung T. Kittiwatnakul, Salinporn Sittipongpittaya, Apiprach Wang, Yuhan Morshed, Md Golam Ghosh, Avik W. Poon, S. Joseph Department of Physics University of Virginia CharlottesvilleVA22904 United States Department of Physics Faculty of Science Chulalongkorn University Bangkok10330 Thailand Department of Electrical and Computer Engineering University of Virginia CharlottesvilleVA22904 United States Department of Material Science and Engineering University of Virginia CharlottesvilleVA22904 United States

The ability to manipulate spins in magnetic materials is essential in designing spintronics devices. One method for magnetic switching is through strain. In VO2 on TiO2 thin films, while VO2 remains rutile across the metal-insulator transition, the in-plane lattice area expands going from low temperature insulating phase to high temperature conducting phase. In a VO2/TbFeCo bilayer, the expansion of the VO2 lattice area exerts tension on the amorphous TbFeCo layer. Through the strain effect, magnetic properties, including the magnetic anisotropy and magnetization, of TbFeCo can be changed. In this work, the changes in magnetic properties of TbFeCo on VO2/TiO2(011) are demonstrated using anomalous Hall effect measurements. Across the metal-insulator transition, TbFeCo loses perpendicular magnetic anisotropy, and the magnetization in TbFeCo turns from out-of-plane to in-plane. Using atomistic simulations, we confirm these tunable magnetic properties originating from the metal-insulator transition of VO2. This study provides the groundwork for controlling magnetic properties through a phase transition. © 2023, CC BY.

关键词： Vanadium dioxide

The embedded CuInS2 into hollow-concave carbon nitride for photocatalytic H2O splitting into H2 with S-scheme principle

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Chinese Journal of Catalysis 2020年第1期41卷 122-130页

作者： Jinhua Luo Zhexing Lin Yan Zhao Shujuan Jiang Shaoqing Song School of Material Science and Chemical Engineering Ningbo UniversityNingbo 315211ZhejiangChina Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingbo 315211ZhejiangChina

It is still a great challenge to effectively optimize the electronic structure of photocatalysts for the sustainable and efficient conversion of solar energy to H2 *** resolve this issue,we report on the optimization of the electronic structure of hollow-concave carbon nitride(C3N4)by deviating the sp2-hybridized structure of its tri-s-triazine component from the two-dimensional *** embedded CuInS2 into C3N4(CuInS2@C3N4)demonstrates an increased light-capturing capability and the promoted directional transfer of the charge *** results reveal that the hollow structure with an apparent potential difference between the concave and convex C3N4 drives the directional transfer of the photoinduced electrons from the Cu 2p orbital of CuInS2 to the N 1s orbital of C3N4 with the S-scheme *** H2 evolution efficiency over CuInS2@C3N4 is up to 373μmol?h^-1 g^-1 under visible irradiation,which is 1.57 and 1.35 times higher than those over the bulk g-C3N4 with 1 wt%Pt(238μmol?h^-1 g^-1)and g-C3N4 with 3 wt%Pd(276μmol?h^-1 g^-1),*** suggests that the apparent potential difference of the hollow C3N4 results in an efficient reaction between the photogenerated electrons and *** work supplies a new strategy for enhancing the sustainable solar conversion performance of carbon nitride,which can also be suitable for other semiconductors.

关键词： Hollow carbon nitride Hydrogen evolution Solar light absorption Directional charge transfer Apparent potential difference

A High-Performance Standalone Planar FAIMS System for Effective Detection of Chemical Warfare Agents

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SSRN

SSRN 2023年

作者： Hao, Jie Feng, Rong Li, Junhui Gao, Wenqing Yu, Jiancheng Tang, Keqi Institute of Mass Spectrometry Zhejiang Engineering Research Center of Advanced Mass spectrometry and Clinical Application Ningbo University Ningbo315211 China Zhenhai Institute of Mass Spectrometry Ningbo315211 China Faculty of Electrical Engineering and Computer Science Ningbo University Ningbo315211 China School of Material Science and Chemical Engineering Ningbo University Ningbo315211 China

A high-performance standalone planar field asymmetric waveform ion mobility spectrometry (p-FAIMS) system with a deconvolution algorithm (two-step particle swarm optimization algorithm, TSPSO) for overlapping peaks was developed to effectively detect chemical warfare agents (CWAs). Four CWA simulants were applied in this study to systemically evaluate the performance of the standalone p-FAIMS system. The experimental results showed that each CWA simulant in the mixture can be positively identified by carefully comparing the compensation voltage (CV) value of each peak in the FAIMS spectra for the mixture to the ones in the spectra acquired by using the same FAIMS system for the pure CWA simulant standards. The FAIMS spectrum of the CWA simulant mixture might consist of multiple overlapping peaks, which would be difficult to accurately determine the CV value for each CWA simulant peak. This problem has been effectively resolved in this study by deconvoluting the overlapping peaks via the TSPSO algorithm. As the effective peak deconvolution via TSPSO requires the degree of overlap between each FAIMS peak to be lower than a specific value, the flow rate of FAIMS carrier gas was degreased to further improve the resolution of the p-FAIMS system. After the accurate deconvolution, the resolution of original FAIMS spectrum can also be enhanced to achieve baseline separation by using TSPSO algorithm to narrow the peak width of each peak. The experimental results in this study proved that this system can achieve effective detection of the CWAs and also offered an effective new method for the high-resolution detection of other complex samples. © 2023, The Authors. All rights reserved.

关键词： Deconvolution

Second-Harmonic Generation Enhancement by Film-Coupled Plasmonic Nanopatch Antennas With Integrated Quantum Emitters

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arXiv 2022年

作者： Krause, Bryson Mishra, Dhananjay Chen, Jiyang Argyropoulos, Christos Hoang, Thang Ba Department of Physics and Material Science University of Memphis MemphisTN38152 United States Department of Electrical and Computer Engineering University of Nebraska-Lincoln LincolnNE68588 United States

Plasmonic nanocavities have proven to be a powerful optical platform for confining light at a length scale much smaller than the diffraction limit. Enhanced electromagnetic fields within the cavity mode volume enable multiple significant effects that lead to applications in both the linear and nonlinear optical regimes. In this work, we demonstrate enhanced second harmonic generation from individual plasmonic nanopatch antennas which are formed by separating silver nanocubes from a smooth gold film using a sub-10 nm zinc oxide spacer layer. When the nanopatch antennas are excited at their fundamental plasmon frequency, a 104-fold increase in the intensity of the second harmonic generation wave is observed. Moreover, by integrating quantum emitters that have an absorption energy at the fundamental frequency, a second order nonlinear exciton-polariton strong coupling response is observed with a Rabi splitting energy of 19 meV. The nonlinear frequency conversion using nanopatch antennas thus provides an excellent platform for nonlinear control of the light-matter interactions in both weak and strong coupling regimes which will have a great potential for applications in optical engineering and information processing. Copyright © 2022, The Authors. All rights reserved.

关键词： Plasmonics

A Biocompatible Phenylboronic Acid-Modified Perovskite Quantum Dot for Glucose Sensing Applications

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SSRN

SSRN 2024年

作者： Chou, Hsin-Yu Shi, Wei-Yi Yen, Chao-Chun Singh, Anoop Wang, Hui-Min David Chiang, Jung-Lung Wuu, Dong-Sing Department of Materials Science and Engineering National Chung Hsing University Taichung40227 Taiwan Department of Material Science and Engineering Graduate Institute of Biomedical Engineering National Chung Hsing University Taichung40227 Taiwan Graduate Institute Prospective Technology of Electrical Engineering and Computer Science National Chin-Yi University of Technology Taichung411030 Taiwan The Innovation and Development Center of Sustainable Agriculture National Chung Hsing University Taichung40227 Taiwan Department of Applied Materials and Optoelectronic Engineering National Chi Nan University Nantou54561 Taiwan

Quantum dots (QDs) are a recently popular nanomaterial with numerous applications, including semiconductors, optoelectronics, and biomedical detection. In this study, we synthesized perovskite QDs using a wet chemical synthesis method and modified them with phenylboronic acid (PBA) to create a non-enzymatic glucose sensing device. XRD, TEM, and FTIR were utilized to demonstrate the structural changes after PBA modification and the mechanism of the glucose reaction. PL was employed to measure the luminescence changes of QD@PBA at different glucose concentrations. The luminescence of QD@PBA exhibited a high correlation with glucose concentration in the range of 1-5 mM, and the detection limit could reach 10−4 mM. On the other hand, in cell toxicity tests, QD@PBA did not demonstrate any toxic reactions or changes in cell morphology after three days of cell culture. Due to its high excitation efficiency, excellent selectivity, and biocompatibility, QD@PBA has the potential to be used as a human serum glucose sensor. Additionally, its high sensitivity, and long lifespan make it a promising candidate for further development in the study of cellular microenvironments. © 2024, The Authors. All rights reserved.

关键词： Perovskite