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Potassium Tantalate (KTaO₃) and Poly-l-Lysine-Assisted Prism-Based SPR Biosensor for E. coli Bacteria Detection under Optimum Radiation Damping

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Plasmonics 2025年 1-9页

作者： Shukla, Sudhir Lohia, Pooja Dwivedi, D.K. Mishra, Adarsh Chandra Department of Electronics and Communication Engineering Madan Mohan Malaviya University of Technology Gorakhpur 273010 India Photonics and Photovoltaic Research Lab Department of Physics and Material Science Madan Mohan Malaviya University of Technology Gorakhpur 273010 India

The theoretical and simulation-based investigation of an SPR biosensor for the detection of Escherichia coli (E. coli) bacteria using optimum radiation damping (ORD) has been performed. The sensor structure consists of a calcium fluoride (CaF₂) prism, silver (Ag) as plasmonic metal, potassium tantalate (KTaO₃) as an absorption enhancement dielectric layer and poly-l-lysine as an affinity layer. Inclusion of KTaO₃ enhances the evanescent field into the structure, while poly-l-lysine provides practical selectivity to the device. The sensor’s figure of merit (FOM) is optimized by concurrent variation of the Ag layer (t_M), KTaO₃ layer (t_A) thicknesses and operating wavelength (λ). An optimized FOM is achieved as 9215 RIU⁻¹ at t_M = 47.9 nm, t_A = 3.4 nm and λ = 1001 nm. This is designated as an ORD condition for the sensor. At ORD, the power loss ratio of 2.78 and the normalized electric field (NEF) enhancement factor of about 1.14 have been achieved. Along with these parametric values, the combined performance factor (CPF) of 29,321.46 RIU⁻¹ has been obtained. The performance of the sensor is way higher than previously reported designs. © The Author(s), under exclusive licence to Springer science+Business Media, LLC, part of Springer Nature 2025.

关键词： Escherichia coli Figure-of-merit Optimum radiation damping Poly-l-lysine Potassium tantalate

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A study of grid failure mode drivers and methods for accelerated life testing of a 30cm diameter ion thruster

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Plasma science and technology 2023年第11期25卷 122-132页

作者：孙明明龙建飞陈娟娟杨威郭伟龙陈新伟 Science and Technology on Vacuum Technology and Physics Laboratory Lanzhou Institute of PhysicsLanzhou 730000People’s Republic of China School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024People’s Republic of China Gravitational Wave Universe Taiji Laboratory Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024People’s Republic of China Key Laboratory of Gravitational Wave Precision Measurement of Zhejiang Province University of Chinese Academy of SciencesHangzhou 310024People’s Republic of China School of Electrical Engineering Chongqing University of Science and TechnologyChongqing 404100People’s Republic of China

In view of the high cost caused by the 1:1 lifetime verification test of ion thrusters,the lifetime acceleration test should be *** work uses the PIC-MCC(Particle-in-Cell MonteCarlo Collision)method to analyze the five failure factors that lead to the failure of the accelerator grid of a 30 cm diameter ion thruster under the working mode of 5 k ***,the acceleration stress levels corresponding to different failure factors are *** results show that background pressure has the highest stress level on the grid's *** accelerator grid aperture's mass sputtering rate under the rated vacuum degree(1×10^(-4)Pa)of 5 k W work mode is 8.78 times that of the baseline vacuum degree(1×10^(-6)Pa),and the mass sputtering rate under worse vacuum degree(5×10^(-3)Pa)is 5.08 times that of 1×10^(-4)*** the influence of the other four failure factors,namely,the voltage of the accelerator grid,upstream plasma density,the screen grid voltage and mass utilization efficiency,the mass sputtering rates of the accelerator grid hole are 2.32,2.67,1.98 and 2.51 times those of the accelerator grid hole under baseline condition,*** ion sputtering results of two 30 cm diameter ion thrusters(both installed with new grids assembly)after working for 1000 h show that the mass sputtering rate of the accelerator grid hole under vacuum conditions of 5×10^(-3)Pa is 4.54 times that under the condition of 1×10^(-4)Pa,and the comparison error between simulation results and test results of acceleration stress is about 10%.In the subsequent ion thruster lifetime verification,the working vacuum degree can be adjusted according to the acceleration stress level of background pressure,so as to shorten the test time and reduce the test cost.

关键词： ion thruster failure factors acceleration stress level

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Transparent SiOxCyHz barrier film prepared by PECVD with upper and lower pair electrode rolls structure 4

Transparent SiOxCyHz barrier film prepared by PECVD with upp...

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2020 4th International Conference on Energy Material, Chemical Engineering and Mining Engineering, EMCEME 2020

作者： Dong, Maojin Wang, Xiaojun Feng, Yudong He, Dan Qin, Lili Wang, Yi Science and Technology on Vacuum Technology and Physics Laboratory Lanzhou Institute of Physics Lanzhou China

Flexible and transparent barrier film is demanded in the fields of organic solar thin-film cells, flexible organic light-emitting diodes, electronic paper and vacuum insulation boards. To prepare films with high water resistance, flexible SiOxCyHz films were prepared on PET using HMDSO as monomer and Oxygen (O2) as reaction gas. SiOxCyHz films were prepared by plasma enhanced chemical vapor deposition (PECVD) with upper and lower pair electrode rolls structure, with the width of electrode rolls up to 600 mm. The influences of oxygen content, film thickness, oxygen/monomer ratio, reaction vacuum degree on water vapor transmission rate (WVTR) were studied. This coating method of oxide high barrier film has great application potential in the development of barrier film industry. © 2021 Institute of physics Publishing. All rights reserved.

关键词： Plasma enhanced chemical vapor deposition

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Design of Thomson scattering diagnostic system on linear magnetized plasma device

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Plasma science and technology 2022年第6期24卷 53-56页

作者： Mengmeng XU Qiaofeng ZHANG Jinlin XIE Department of Plasma Physics and Fusion Engineering School of Nuclear Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026People's Republic of China CAS Key Lab of Geoscience Environment School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026People's Republic of China

In addition to the magnetic confinement fusion plasma,Thomson scattering has been applied to measure electron density and temperature of low-temperature *** on a linear magnetized plasma device,a set of Thomson scattering diagnostic system is designed to diagnose the plasma with n_(e)=10^(18)–10^(19)m^(-3)and T_(e)=2–*** to low plasma temperature and density,this diagnostic system needs high spectral resolution and collection efficiency to meet the requirements of electron velocity distribution function *** the bench test,it is confirmed that the spectral resolution reaches 0.01 nm,and theoretical collection efficiency is high enough to obtain a Thomson scattering spectrum by 1000 accumulations.

关键词： Thomson scattering low temperature plasma EVDF

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Bidirectionally aligned MXene hybrid aerogels assembled with MXene nanosheets and microgels for supercapacitors

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Rare Metals 2023年第4期42卷 1249-1260页

作者： Pei-Xuan Li Guo-Zhen Guan Xin Shi Lei Lu Yu-Chao Fan Jie Xu Yuan-Yuan Shang Ying-Jiu Zhang Jin-Quan Wei Feng-Mei Guo Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou450052China Key Lab for Advanced Materials Processing Technology of Education Ministry State Key Lab of New Ceramic and Fine ProcessingSchool of Materials Science and EngineeringTsinghua UniversityBeijing100084China

MXene nanomaterials are one of the most promising electrode material candidates for supercapacitors owing to their high conductivity,abundant surface functional groups and large surface ***,electrodes based on MXene may result in low ion-accessible surface area and blocked ion transport pathways because of the self-restacking of MXene *** is essential to suppress the self-res tacking of nanosheets and increase the electrochemical active sites in order to optimize the *** this work,bidirectionally aligned MXene hybrid aerogel(A-MHA)assembled with MXene nanosheets and microgels is prepared using a facile bidirectional freeze casting and freeze-drying *** bidirectionally aligned structure together with the three-dimensional structured microgels in the A-MHAs,can improve the ionaccessible surface area and provide more barrier-free channels by exposing more active sites and ensuring electrolyte transport *** A-MHA with MXene microgels content of 40 wt%exhibits a high specific capacitance of 760 F·g^(-1)at 1 A·g^(-1)and a remarkable cyclic performance of 97%after 10,000 cycles at100 mV·s^(-1)in 1 mol·L^(-1)H_(2)SO_(4)electrolyte.A-MHAs show remarkable electrochemical properties and are of potential application in energy storage.

关键词： MXene MXene microgels Bidirectionally aligned structure Electrodes Supercapacitors

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All-optical neuromorphic devices: materials, working mechanism,and applications

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science China Chemistry 2025年

作者： Song Wang Hao Chen Hui Huang College of Materials Science and Opto-Electronic Technology Center of Materials Science and Optoelectronics Engineering CAS Center for Excellence in Topological Quantum Computation CAS Key Laboratory of Vacuum Physics University of Chinese Academy of Sciences College of Chemistry and Molecular Engineering Peking University

Traditional von Neumann computing, with physical separation of memory and processing units, cannot satisfy the development of artificial intelligence and cloud computing. Neuromorphic computing, inspired by the human brain, has drawn much ***-optical neuromorphic (AON) devices employ optical signals as information carriers and leverage the neuromorphic functions to implement fast operation speed, low energy consumption, and high bandwidth of neuromorphic computing. Here, we discuss the recent progress in AON devices, including materials, device performance, working mechanisms, and applications. Moreover,the advantages and limitations of AON are presented and discussed. Finally, the perspective of AON devices points out the future research direction of neuromorphic computing.

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Acceleration of bidirectional sulfur conversion kinetics and inhibition of lithium dendrites growth via a“ligand-induced”transformation strategy

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Nano Research 2023年第7期16卷 9496-9506页

作者： Wei Zhou Minzhe Chen Dengke Zhao Jiacheng Dan Chuheng Zhu Wen Lei Li-Jun Ma Nan Wang Xinghua Liang Ligui Li New Energy Research Institute School of Environment and EnergySouth China University of TechnologyHigher Education Mega CenterGuangzhou 510006China The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081China Key Laboratory of Theoretical Chemistry of Environment Ministry of Education School of Chemistry and EnvironmentSouth China Normal UniversityGuangzhou 510631China Siyuan laboratory Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhou 510632China Guangxi Key Laboratory of Automobile Components and Vehicle Technology Guangxi University of Science and TechnologyLiuzhou 545006China

The introduction of materials with dual-functionalities,i.e.,the catalytic(adsorption)features to inhibit shuttle effects at the cathode side,and the capability to facilitate homogenous Li-ion fluxes at the anode side,is a promising strategy to realize high performance lithium-sulfur batteries(LSBs).Herein,a facile and rational organic“ligand-induced”(trimesic acid(TMA))transformation tactic is proposed,which achieves the regulation of electronic performance and d-band center of bimetallic oxides(NiFe_(2)O_(4))to promote bidirectional sulfur conversion kinetics and stabilize the Li plating/striping during the charge/discharge *** battery assembled with NiFe_(2)O_(4)-TMA modified separator exhibits a remarkable initial specific capacity of 1476.6 mAh·g^(-1)at 0.1 C,outstanding rate properties(661.1 mAh·g^(-1)at 8.0 C),and excellent cycling ***“ligand-induced”transformation tactic proposed in this work will open a whole new possibility for tuning the electronic structure and d-band center to enhance the performance of LSBs.

关键词： organic“ligand-induced”transformation NiFe_(2)O_(4)-trimesic acid(TMA) bidirectional sulfur conversion high sulfur loading

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Rational design of a laminate-structured flexible sensor for human dynamic plantar pressure monitoring

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Microsystems & Nanoengineering 2024年第4期10卷 201-210页

作者： Zuoping Xiong Yuanyuan Bai Lianhui Li Zhen Zhou Tie Li Ting Zhang School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefeiAnhui 230026P.R.China i-lab Nano-X Vacuum Interconnected WorkstationSuzhou Institute of Nano-Tech&Nano-Bionics(SINANO)Chinese Academy of Sciences(CAS)SuzhouJiangsu 215123P.R.China Suzhou Leanstar Electronic Technology Co. LtdSuzhouJiangsu 215000P.R.China

Flexible sensors are essential components in emerging fields such as epidermal electronics,biomedicine,and humancomputer interactions,and creating high-performance sensors through simple structural design for practical applications is increasingly ***,challenges still exist in establishing efficient models of flexible piezoresistive pressure sensors to predict the design required for achieving target *** work establishes a theoretical model of a flexible pressure sensor with a simple laminated and enclosed *** the modeling,the electrical constriction effect is innovatively introduced to explain the sensitization mechanism of the laminated structure to a broad range of pressures and to predict the sensor *** experimental results confirmed the effectiveness of the theoretical *** sensor exhibited excellent stability for up to three million cycles and superior durability when exposed to salt solution owing to its simple laminated and enclosed structural ***,a wearable sensing system for real-time collection and analysis of plantar pressure is constructed for exercise and rehabilitation monitoring *** work aims to provide theoretical guidance for the rapid design and construction of flexible pressure sensors with target performance for practical applications.

关键词： Rational laminated laminate

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Perovskite-based color camera inspired by human visual cells

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Light(science & Applications) 2023年第2期12卷 294-303页

作者： Yujin Lu Zhong Ji Guobiao Cen Hengchao Sun Haibao Wang Chuanxi Zhao Zhong Lin Wang Wenjie Mai Siyuan Laboratory Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy MaterialsGuangdong Provincial Key Laboratory of Optical Fiber Sensing and CommunicationsGuangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhouGuangdong 510632China Guangzhou Institute of Technology Xidian UniversityGuangzhouGuangdong 510555China Bejing Smart-Chip Microelectronics Technology Co. Ltd.Bejing 100192China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBejing 100083China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

There are two primary types of photoreceptor cells in the human eye:cone cells and rod cells that enable color vision and night vision,***,inspired by the function of human visual cells,we develop a high-resolution perovskite-based color camera using a set of narrowband red,green,blue,and broadband white perovskite photodetectors as imaging *** narrowband red,green,and blue perovskite photodetectors with color perceptions mimic long-,medium-,and short-wavelength cones cells to achieve color imaging ***,the broadband white perovskite photodetector with better detectivity mimics rod cells to improve weak-light imaging *** perovskite-based camera,combined with predesigned pattern illumination and image reconstruction technology,is demonstrated with high-resolution color images(up to 256 x 256 pixels)in diffuse *** is far beyond previously reported advanced perovskite array image sensors that only work in monochrome transmission *** work shows a new approach to bio-inspired cameras and their great potential to strongly mimic the ability of the natural eve.

关键词： visual perovskite image

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Compact Optical Frequency Standard Based on87Rb D1 Line 37

Compact Optical Frequency Standard Based on87Rb D1 Line

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37th European Frequency and Time Forum, EFTF 2024

作者： Chen, Jingming Miao, Jie Yang, Qiaohui Liu, Tianyu Chen, Zhendong Pan, Duo Lian, Jiqing Chen, Jingbiao School of Electronics Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks Beijing100871 China Lanzhou Institute of Physics Science and Technology on Vacuum Technology and Physics Laboratory Lanzhou730000 China School of Mechano-Electronic Engineering Xidian University Xi'an710071 China Hefei National Laboratory Hefei China

ISBN: (纸本)9798350354270

In this paper, we investigate the modulation transfer spectroscopy (MTS) of 87Rb D1 line under noncycling transitions. The line shape of the MTS signal was determined, and the system's long-term stability was measured. Results showed that the system consistently performed at a short-term and long-term stability of E-14 level estimated from the residual error signal, indicating high performance of the compact optical frequency standard. © 2024 IEEE.

关键词： Signal modulation

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