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High-Efficiency Photo-Induced Charge Transfer for SERS Sensing in N-Doped 3D-Graphene on Si Heterojunction

Energy & Environmental Materials 2024年第2期7卷 268-276页

作者： Guanglin Zhang Jie Sun Genwang Wei Shan Zhang Zhengyi He Huijuan Wu Bingkun Wang Siwei Yang Guqiao Ding Zhiduo Liu Zhiwen Jin Caichao Ye Gang Wang Department of Microelectronic Science and Engineering School of Physical Science and TechnologyNingbo UniversityNingbo 315211China Department of Biochemistry and Molecular Biology School of Basic Medical SciencesShenzhen UniversityShenzhen 518071China Academy for Advanced Interdisciplinary Studies&Department of Materials Science and Engineering Guangdong Provincial Key Laboratory of Computational Science and Material DesignSouthern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081China School of Physical Science and Technology&Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou UniversityLanzhou 730000China

Nitrogen-doped three-dimensional graphene(N-doped 3D-graphene)is a graphene derivative with excellent adsorption capacity,large specific surface area,high porosity,and optoelectronic ***,N-doped 3D-graphene/Si heterojunctions were grown in situ directly on silicon(Si)substrates via plasma-assisted chemical vapor deposition(PACVD),which is promising for surface-enhanced Raman scattering(SERS)substrates *** analyses of theoretical simulation,incorporating N atoms in 3D-graphene are beneficial to increase the electronic state density of the system and enhance the charge transfer between the substrate and the target *** enhancement of the optical and electric fields benefits from the stronger light-matter interaction improved by the natural nano-resonator structure of N-doped *** as-prepared SERS substrates based on N-doped 3D-graphene/Si heterojunctions achieve ultra-low detection for various molecules:10^(-8)M for methylene blue(MB)and 10^(-9)M for crystal violet(CRV)with rhodamine(R6G)of 10^(10)*** practical detected,10^(-8)M thiram was precisely detected in apple peel *** results indicate that N-doped 3D-graphene/Si heterojunctions based-SERS substrates have promising applications in low-concentration molecular detection and food safety.

关键词： charge transfer DFT simulation N-doped 3D-graphene SERS Thiram detection

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Source-specific health effects of internally exposed organics in urban PM2.5 based on human serum albumin adductome analysis

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Science of the Total Environment 2024年 955卷 176958页

作者： Zeng, Yaling Yang, Xin Zhang, Antai Yuan, Xin Zhai, Jinghao Xing, Chunbo Cai, Baohua Shi, Shao Zhang, Yin Zhang, Yujie Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen518055 China Guangdong Provincial Observation and Research Station for Coastal Atmosphere and Climate of the Greater Bay Area Shenzhen518055 China

Once inhaled, organic compounds in ambient PM2.5 permeate the bloodstream, resulting in internal exposure. The intricate composition of these internalized organic molecules complicates the processes of source attribution and toxicity assessment. A systematic framework to assess the health impacts of water-soluble organic molecules (WSOMs) originating from diverse sources is still undeveloped. This study aims to comprehensively analyze the source-specific health effects of internalized organics in urban PM2.5 through human serum albumin (HSA) non-covalent adductomes with WSOMs. Using high-resolution mass spectrometry, surface plasmon resonance, and machine learning, we mapped HSA-WSOM interactions, uncovering WSOM's potential internal exposure through its HSA adductome. The study identified eight distinct sources of internalized WSOMs, primarily from biogenic emissions, gasoline exhaust, and biomass combustion. Notably, WSOMs from these sources exhibited a predominant interaction with HSA residues ARG257, LEU238, and TRP150, substantially altering the functional dynamics of fatty acid binding site two and the hydrophobic cavity via hydrogen bonding and hydrophobic interactions. The primary health impacts of internalized WSOMs were identified as neurotoxicity and respiratory toxicity. WSOMs originating from biogenic sources and ocean emissions were mainly responsible for neurotoxic effects, whereas those from biomass burning and gasoline exhaust predominantly caused respiratory toxicity. Using the HSA adductome framework, our study identifies source-specific profiles and health effects of internally exposed WSOMs in urban PM2.5, emphasizing the importance of targeted mitigation strategies. © 2024

关键词： Body fluids

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Frequency-modulated continuous-wave quantum interferometric lidar with enhanced accuracy and resolution

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Physical Review Applied 2025年第3期23卷 034055-034055页

作者： Ming-Da Huang Zhan-Feng Jiang Hong-Yi Chen Ying Zuo Xiao-Peng Hu Hai-Dong Yuan Li-Jian Zhang Qi Qin College of Physics and Optical Engineering Shenzhen University Shenzhen 518060 China State Key Laboratory of Radio Frequency Heterogeneous Integration Shenzhen University Shenzhen 518060 China Institute of Intelligent Optical Measurement and Detection Shenzhen University Shenzhen 518060 China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen 518055 China International Quantum Academy Shenzhen 518048 China Guangdong Provincial Key Laboratory of Quantum Science and Engineering Southern University of Science and Technology Shenzhen 518055 China National Laboratory of Solid State Microstructures and College of Engineering and Applied Sciences Nanjing University Nanjing 210093 China Department of Mechanical and Automation Engineering The Chinese University of Hong Kong Shatin Hong Kong SAR China Quantum Science Center of Guangdong-HongKong-Macao Greater Bay Area (Guangdong) Shenzhen 518045 China

The range and velocity of a moving object can be ascertained using the sensing technique known as light detection and ranging (lidar). It has recently been suggested that quantum lidar, which uses entangled states of light, can enhance the capabilities of lidar. Entangled pulsed light is used in prior quantum lidar approaches to assess both range and velocity at the same time using the time of flight and Doppler shift. However, the detection of entangled pulsed light is often inefficient and constrained by the temporal resolution of the detectors. Here, we investigate a quantum lidar utilizing a linear interferometer operating on a frequency-modulated continuous wave (FMCW) instead of pulses. Our findings demonstrate that the quantum FMCW lidar enables simultaneous measurements of range and velocity with quantum-enhanced accuracy and resolution, as well as superresolution phase imaging. Through self-heterodyne detection with a linear optical design, the signals of the quantum FMCW lidar with entangled photon pair can be efficiently carried out electronically by down-converting the optical signal to the microwave region. As a result, it is better suited for practical implementations.

关键词： Frequency modulation

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Design and Implementation of a Three-Dimensional Vector Hydrophone with Half-Wheatstone Bridge

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IEEE Sensors Journal 2025年

作者： Liu, Guochang Wang, Renxin Liu, Huimin Zhang, Wendong Zhang, Guojun Zhang, Min Li, Xinghui Wang, Xiaohao Tsinghua University Tsinghua Shenzhen International Graduate School Shenzhen518055 China North University of China State Key Laboratory of Dynamic Measurement Technology Taiyuan030051 China Shanxi Institute of Energy Department of Safety Engineering Jinzhong030600 China

Three-dimensional (3D) microelectromechanical systems (MEMS) vector hydrophones offer advantages such as single-point observation, high sensitivity, strong low-frequency detection capabilities, and excellent directionality. However, there remains potential for optimizing the structural dimensions. To achieve further miniaturization, this paper proposes a 3D MEMS vector hydrophone utilizing a Half-Wheatstone bridge design. First, the working principle of the hydrophone is introduced, in which underwater acoustic signals are converted into voltage outputs through three sets of Half-Wheatstone bridges. Second, structural parameter optimization, stress and eigenfrequency simulations, and transient and frequency domain simulations were conducted using finite element simulation software. Subsequently, a hydrophone chip is fabricated using standard MEMS processes. Finally, sensitivity and directivity tests are conducted. The results show that the proposed 3D MEMS vector hydrophone achieves a detection frequency band of 20-500 Hz, with sensitivities of -190.1 dB, -190.3 dB, and -201.9 dB @ 500 Hz (0 dB = 1 V/μPa) along the three axes, and null depths of 25.2 dB, 25.6 dB, and 22.5 dB, respectively. The effective area is reduced by 12.9%, thereby demonstrating promising prospects for engineering applications. © 2001-2012 IEEE.

关键词： Frequency domain analysis

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Characterization of anisotropic microstructure in biological tissues based on Stokes polarization imaging during dehydration process 12

Characterization of anisotropic microstructure in biological...

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Optics in Health Care and Biomedical Optics XII 2022

作者： Fu, Qiqi Song, Jiawei Zeng, Nan Ma, Hui Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology Shenzhen Key Laboratory for Minimal Invasive Medical Technologies Graduate School at Shenzhen Tsinghua University Shenzhen518055 China Department of Physics Tsinghua University Beijing100084 China Center for Precision Medicine and Healthcare Tsinghua-Berkeley Shenzhen Institute Shenzhen518071 China

ISBN: (纸本)9781510657069

Polarization is a non-invasive optical technique and has become an emerging new tool in biomedicine studies due to its sensitivity to microstructure. The development of fast polarization techniques has enabled the application of polarimetry not only include static samples such as pathological sections, but also contain dynamic samples such as the process of tissue optical clearing (TOC). Dehydration is one of the important mechanisms of TOC which can result in the changes in tissue anisotropy, samples with different structures will show different characteristics in dehydration. In this study, three kinds of tissues with different degree of anisotropic including skeletal muscle, skin and fat are employed. We extracted and compared the temporal polarization parameters of several samples which may be related to the properties of microstructures. Monte Carlo (MC) simulation was combined to further explore the relationship between temporal polarization parameters and anisotropy of the sample. We first verified the main mechanisms of dehydration in sphere-cylinder birefringence model (SCBM). Then the optical properties of the microstructure in the model were changed to explore their influence on the polarization parameters. By analyzing the polarization parameters extracted from temporal Stokes images and Monte Carlo simulation, we can present polarization parameters to characterize microstructures of biological tissues. © 2022 SPIE.

关键词： Microstructure

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High-Efficiency Photoelectric Detector Based on a p-n Homojunction of Monolayer Black Phosphorus

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Physical Review Applied 2023年第2期20卷 024027-024027页

作者： Xueying Zuo Jingjing Cheng Yulin Liang Fuming Xu Yanxia Xing Center for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE) School of Physics Beijing Institute of Technology Beijing 100081 China College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 China

We numerically investigate the high-efficiency photovoltaic effect in a lateral p-n homojunction based on monolayer black phosphorus (MBP) by using the nonequilibrium Green’s function combined with the density-functional theory. Because of the built-in electric field of the p-n junction and the wrinkle structure of MBP, the photocurrent excited by either linearly or elliptically polarized light is significantly enhanced in a wide photon energy range. Moreover, because of the electron-photon interaction, the photocurrent is related to atomic orbitals through the polarizing angle of the polarized light. Therefore, we can read the orbital information of the band structure from the polarizing angular distribution of the photocurrent. These findings suggest the promising application of the MBP-based p-n homojunction in high-efficiency photoelectric devices and orbital-resolved photovoltaic detection.

关键词： Optoelectronics Photocurrent Elemental semiconductors Junctions Monolayer films Photovoltaic absorbers Density functional calculations Green's function methods

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A flat-field Mueller matrix imaging system with a large field of view 12

A flat-field Mueller matrix imaging system with a large fiel...

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Optics in Health Care and Biomedical Optics XII 2022

作者： Song, Jiawei Yang, Huibin Zeng, Nan Ma, Hui Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology Shenzhen Key Laboratory for Minimal Invasive Medical Technologies Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen518055 China Department of Physics Tsinghua University Beijing100084 China Shenzhen International Graduate School Tsinghua University Shenzhen China Center for Precision Medicine and Healthcare Tsinghua-Berkeley Shenzhen Institute Shenzhen518071 China

ISBN: (纸本)9781510657069

Polarization imaging has shown the potential as a label-free tool in biomedical research due to its sensitivity to microstructures, especially the anisotropy analysis in pathological diagnosis. The digital pathology based on Mueller matrix systems has developed rapidly in recent years, and gradually progressed from qualitative to quantitative recognition. However, traditional critical illumination used in Mueller microscopes is likely to generate non-uniform projection accompanied by spatially varying irradiance, possibly due to unaligned optics, dust, nonuniform light sources, vignetting, etc. The non-uniform illumination results in artifacts in polarization images when stitching adjacent images to obtain a polarized image of the full sample, limiting the increase of the field of view (FOV). Therefore, a Mueller matrix microscope system with flat-field illumination and with motorized two-axis stage is proposed, we minimize the artifacts caused during splicing by uniform illumination, as well as increase the signal-to-noise (SNR) in the whole polarization images. The comparison of the real pathological sections under flat-field and wide-field illumination confirms the potential of large FOV imaging, which allows the structure of the sample to be presented more completely, laying the foundation for future pixel-level polarization digital pathology. © 2022 SPIE.

关键词： Light sources

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Asymmetric Fraunhofer pattern in Josephson junctions from heterodimensional superlattice V_(5)S_(8)

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Chinese Physics B 2022年第5期31卷 63-67页

作者： Juewen Fan Bingyan Jiang Jiaji Zhao Ran Bi Jiadong Zhou Zheng Liu Guang Yang Jie Shen Fanming Qu Li Lu Ning Kang Xiaosong Wu State Key Laboratory for Artificial Microstructure and Mesoscopic Physics Frontiers Science Center for Nano-optoelectronicsPeking UniversityBeijing 100871China Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(Ministry of Education) Beijing Key Laboratory of Nanophotonics&Ultrafine Optoelectronic Systemsand School of PhysicsBeijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics Peking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China

Introduction of spin-orbit coupling(SOC)in a Josephson junction(JJ)gives rise to unusual Josephson *** investigate JJs based on a newly discovered heterodimensional superlattice V_(5)S_(8) with a special form of *** unique homointerface of our JJs enables elimination of extrinsic effects due to interfaces and *** observe asymmetric Fraunhofer patterns with respect to both the perpendicular magnetic field and the *** asymmetry is influenced by an in-plane magnetic *** of the pattern points to a nontrivial spatial distribution of the Josephson current that is intrinsic to the SOC in V_(5)S_(8).

关键词： Fraunhofer pattern Josephson junction spin-orbit coupling homointerface

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Flow Stokes Microscopy for High Throughput Classification of Marine Particles

SSRN

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SSRN 2023年

作者： Han, Baohui Hu, Zheng Huang, Tongyu Cui, Wei Liu, Hongyuan Yang, Jianxiong Liao, Ran Ma, Hui Shenzhen Key Laboratory of Marine IntelliSensing and Computation Institute for Ocean Engineering Shenzhen International Graduate School Tsinghua University Shenzhen China Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology Shenzhen International Graduate School Tsinghua University Shenzhen China

High throughput classification of marine particles facilitates the fast environment monitoring of harmful microalgae blooms and microplastics pollution. A conceptual setup of flow Stokes microscopy is based on a Stokes microscope whose imaging area is passed through by the suspension flow in a microchannel to measure a time series of Stokes images. The setup’s measurement speed is 4.25 milliliter per hour and the particulate concentration error is less than 6%. Standard microplastics and cultured microalgae are measured and classified with general accuracy larger than 99%. Also, some of them are accurately classified when mixing with the natural seawater. Both the imaging and polarization features’ contribution are analyzed. Improvements of the microchannel are discussed to achieve higher throughput, more robust classification and broader application. This work demonstrates the flow Stokes microscopy’s power for high throughput classification of marine particles, which provides a promising tool in future aquatic environmental monitoring. © 2023, The Authors. All rights reserved.

关键词： Microplastic

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Stretchable and anti-impact iontronic pressure sensor with an ultrabroad linear range for biophysical monitoring and deep learning-aided knee rehabilitation

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Microsystems & Nanoengineering 2021年第6期7卷 107-117页

作者： Hongcheng Xu Libo Gao Haitao Zhao Hanlin Huang Yuejiao Wang Gang Chen Yuxin Qin Ningjuan Zhao Dandan Xu Ling Duan Xuan Li Siyu Li Zhongbao Luo Weidong Wang Yang Lu School of Mechano-Electronic Engineering Xidian UniversityXi’an 710071China CityU-Xidian Joint Laboratory of Micro/Nano-Manufacturing Shenzhen 518057China Materials Interfaces Center Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055 GuangdongP.R.China Key Laboratory of Instrumentation Science and Dynamic Measurement Ministry of EducationNorth University of ChinaTaiyuan 030051China Nano-Manufacturing Laboratory(NML) Shenzhen Research Institute of City University of Hong KongShenzhen 518057China Department of Mechanical Engineering City University of Hong KongHong Kong SARKowloon 999077Hong Kong

Monitoring biophysical signals such as body or organ movements and other physical phenomena is necessary for patient ***,stretchable flexible pressure sensors with high sensitivity and a broad range that can meet these requirements are still ***,we successfully monitored various vital biophysical features and implemented in-sensor dynamic deep learning for knee rehabilitation using an ultrabroad linear range and highsensitivity stretchable iontronic pressure sensor(SIPS).We optimized the topological structure and material composition of the electrode to build a fully stretching on-skin *** high sensitivity(12.43 kPa^(−1)),ultrabroad linear sensing range(1 MPa),high pressure resolution(6.4 Pa),long-term durability(no decay after 12000 cycles),and excellent stretchability(up to 20%)allow the sensor to maintain operating stability,even in emergency cases with a high sudden impact force(near 1 MPa)applied to the *** a practical demonstration,the SIPS can positively track biophysical signals such as pulse waves,muscle movements,and plantar ***,with the help of a neuro-inspired fully convolutional network algorithm,the SIPS can accurately predict knee joint postures for better rehabilitation after orthopedic *** SIPS has potential as a promising candidate for wearable electronics and artificial intelligent medical engineering owing to its unique high signal-to-noise ratio and ultrabroad linear range.

关键词： impact durability stretching

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