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Laser direct writing of flexible multifunctional airflow sensors on the Kevlar fabric

Nano Research 2025年第1期18卷 443-454页

作者： Wei Wang Zi-Qing Chen Yong-Qi Li Yu-Long Wang Mei-Chen Liu Yun-Bo Ruan Yang Zhang Shu-Juan Liu Qiang Zhao College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory of Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts and TelecommunicationsNanjing 210023China Zhe Jiang Topsun Logistic Control CO. LTD.Yuhuan 317600China Department of Rehabilitation Medicine School of Acupuncture-Moxibustion and Tuina and School of Health Preservation and RehabilitationNanjing University of Chinese MedicineNanjing 210023China

The growing interest in flexible devices has emerged as a global trend due to their advantages in flexibility,lightweight structure,and wearability,addressing the limitations of traditional *** wearable airflow sensors have been previously reported,the development of flexible fabric-based airflow sensors capable of functioning in environments with open flames—critical for fire rescue operations—has yet to be explored,largely due to the poor fire resistance of conventional *** this work,we first present a flexible,wearable,and multifunctional airflow sensor with excellent fire-resistant properties,fabricated through a simple direct laser writing *** sensor maintains airflow detection capabilities even in the presence of open ***,the fabrication of fabric-based sensors involves complex procedures such as carbon materials doping or vapor-phase deposition,leading to lengthy preparation cycles and high ***,fabric-based devices are inherently prone to *** address these challenges,we introduce twice-vertical laser-induced graphene(TVLIG)as a sensitive and reliable component for fire-resistant airflow *** resulting TVLIG/Kevlar fabric can be integrated into various garments,particularly protective suits,to form sensitive and fire-resistant airflow sensors capable of detecting airflow velocity and direction in both two-dimensional(2D)and three-dimensional(3D)spaces during fire ***,the TVLIG patterns can be expanded to multifunctional platforms,such as glucose detection for injured individuals,offering further applications in rescue *** functional expansion reduces the burden on rescue personnel and streamlines device *** its outstanding sensing capabilities,fire resistance,and expandability,the developed flexible airflow sensor shows great potential for various real-world rescue scenarios,promising advancements in wearable sensing technology for rescue enginee

关键词： flexible airflow sensor direct laser writing twice-vertical laser-induced graphene fire accident rescue Kevlar fabric

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Highly Thermoconductive,Strong Graphene‑Based Composite Films by Eliminating Nanosheets Wrinkles

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Nano-Micro Letters 2024年第1期16卷 328-340页

作者： Guang Xiao Hao Li Zhizhou Yu Haoting Niu Yagang Yao College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional Materialsand Collaborative Innovation Center of Advanced MicrostructuresNational Laboratory of Solid State MicrostructuresNanjing UniversityNanjing 210093People’s Republic of China Institute of Laser Manufacturing Henan Academy of SciencesZhengzhou 450052People’s Republic of China Center for Quantum Transport and Thermal Energy Science School of Physics and TechnologyNanjing Normal UniversityNanjing 210023People’s Republic of China

Graphene-based thermally conductive composites have been proposed as effective thermal management materials for cooling high-power electronic ***,when flexible graphene nanosheets are assembled into macroscopic thermally conductive composites,capillary forces induce shrinkage of graphene nanosheets to form wrinkles during solution-based spontaneous drying,which greatly reduces the thermal conductivity of the ***,graphene nanosheets/aramid nanofiber(GNS/ANF)composite films with high thermal conductivity were prepared by in-plane stretching of GNS/ANF composite hydrogel networks with hydrogen bonds andπ-π*** in-plane mechanical stretching eliminates graphene nanosheets wrinkles by suppressing inward shrinkage due to capillary forces during drying and achieves a high in-plane orientation of graphene nanosheets,thereby creating a fast in-plane heat transfer *** composite films(GNS/ANF-60 wt%)with eliminated graphene nanosheets wrinkles showed a significant increase in thermal conductivity(146 W m^(−1)K^(−1))and tensile strength(207 MPa).The combination of these excellent properties enables the GNS/ANF composite films to be effectively used for cooling flexible LED chips and smartphones,showing promising applications in the thermal management of high-power electronic devices.

关键词： Graphene Aramid nanofiber Wrinkles elimination In-plane stretching Thermal conductivity

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Speeding-up direct implicit particle-in-cell simulations in bounded plasma by obtaining future electric field through explicitly propulsion of particles

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Chinese Physics B 2023年第12期32卷 430-440页

作者：谭海云黄天源季佩宇周铭杰诸葛兰剑吴雪梅 School of Physical Science and Technology&Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow UniversitySuzhou 215006China Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province&Key Laboratory of Modern Optical Technologies of Education Ministry of China Soochow UniversitySuzhou 215006China School of Optoelectronic Science and Engineering Soochow UniversitySuzhou 215006China Analysis and Testing Center Soochow UniversitySuzhou 215123China

The direct implicit particle-in-cell is a powerful kinetic method for researching plasma ***,it is time-consuming to obtain the future electromagnetic field in such a method since the field equations contain time-dependent matrix *** this work,we propose to explicitly push particles and obtain the future electromagnetic field based on the information about the particles in the *** new method retains the form of implicit particle pusher,but the future field is obtained by solving the traditional explicit *** numerical experiments,including the motion of charged particle in electromagnetic field,plasma sheath,and free diffusion of plasma into vacuum,are implemented to evaluate the performance of the *** results demonstrate that the proposed method can suppress finite-grid-instability resulting from the coarse spatial resolution in electron Debye length through the strong damping of high-frequency plasma oscillation,while accurately describe low-frequency plasma phenomena,with the price of losing the numerical stability at large *** believe that this work is helpful for people to research the bounded plasma by using particle-in-cell simulations.

关键词： particle-in-cell direct implicit simulation finite-grid-instability

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Construction, photoelectric response and phase transition for new hybrid double perovskites showing narrow band gaps

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Chinese Chemical Letters 2023年第4期34卷 595-600页

作者： Changyuan Su Zhixu Zhang Jie Yao Ming Chen Peizhi Huang Yi Zhang Dawei Fu Liyan Xie Ordered Matter Science Research Center Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing 211189China Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsZhejiang Normal UniversityJinhua 321004China Chaotic Matter Science Research Center Department of MaterialsMetallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou 341000China

To explore the lead-free key scientific issue in perovskite, double perovskite based on Ag Bi and Cu Bi was naturally selected as a competitive candidate due to its fascinating functional features, such as self-powered circularly polarized light detection, X-ray detection, photoluminescence and so on. However, the most challenging point is to simulate the structure and function of traditional lead-based perovskite in new double perovskite. At the same time, there are few suitable double perovskite systems with optical and electrical potential. The above two points greatly limit the competitiveness of double perovskite. In order to solve this problem, firstly, by analyzing and comparing previous studies,we used 2,2-dimethylpropan-1-aminium(abbreviated as 2,2-DPA) as the organic template to assemble materials. Solid-to-solid phase transition materials(2,2-DPA)3Bi2I91 and(2,2-DPA)3Pb2I72 were constructed. Along the path of lead-free and two-dimensional maintenance, we successfully synthesized(2,2-DPA)4AgBiI8.H_(2)O 3 and(2,2-DPA)_(4)CuBiI8.H_(2)O 4. As two typical semiconductors, 3 and 4 with narrower optical band gaps of 1.98 and 1.76 e V show obvious photo-response when the xenon lamp with intensity of 20 m W/cm^(2)is on or off, implying that they may be applied to light-harvesting and light-detecting devices. By referring to the phase transition mechanism of 1 and 2, 3 may be caused by ordered-disordered transition of the organic part, which was proven to be the first solid-to-solid phase transition material with <100>-oriented layered double perovskites with n = 1 by systematic characterization methods after dehydration for all we know. We believed that this work can provide meaningful guidance for the development of lead-free double perovskites.

关键词： Double perovskite Photoelectric response Phase transition Dielectric properties Semiconducting behavior

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Preparation of CoO/SnO_(2)@NC/S composite as high-stability cathode material for lithium-sulfur batteries

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International Journal of Minerals,Metallurgy and Materials 2021年第10期28卷 1647-1655页

作者： Meng-ting Duan Meng-rong Wu Kai Xue Zheng-xu Bian Jing Shi Xing-mei Guo Fu Cao Jun-hao Zhang Qing-hong Kong Feng Zhang School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of the Environment and Safety Engineering Jiangsu UniversityZhenjiang 212013China Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of TechnologyYancheng 224051China

To improve the sulfur loading capacity of lithium-sulfur batteries(Li-S batteries)cathode and avoid the inevitable“shuttle effect”,hollow N doped carbon coated CoO/SnO_(2)(CoO/SnO_(2)@NC)composite has been designed and prepared by a hydrothermal-calcination *** specific surface area of CoO/SnO_(2)@NC composite is 85.464 m2·g^(-1),and the pore volume is 0.1189 cm3·g^(-1).The hollow core-shell structure as a carrier has a sulfur loading amount of 66.10%.The initial specific capacity of the assembled Li-S batteries is 395.7 mAh·g^(-1) at 0.2 C,which maintains 302.7 mAh·g^(-1) after 400 *** the rate increases to 2.5 C,the specific capacity still has 221.2 mAh·g^(-1).The excellent lithium storage performance is attributed to the core-shell structure with high specific surface area and *** structure effectively increases the sulfur loading,enhances the chemical adsorption of lithium polysulfides,and reduces direct contact between CoO/SnO_(2) and the electrolyte.

关键词： hydrothermal-calcination method CoO/SnO_(2)@NC composite lithium-sulfur battery cycling stability

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Multiple Sensor Fusion-Based Positioning Robot for Steam Generator Inspection 2

Multiple Sensor Fusion-Based Positioning Robot for Steam Gen...

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2nd International Symposium on Sensor technology and Control, ISSTC 2023

作者： You, Jingwei Wei, Shouqi Wu, Xiong Sun, Jianquan Guilin University of Electronic Technology Department of Electrical Engineering Guilin541004 China Chinese Academy of Sciences Guangdong Provincial Key Lab of Robotics and Intelligent System Shenzhen Institutes of Advanced Technology Shenzhen518000 China SIAT-CUHK Joint Laboratory of Robotics and Intelligent Systems Shenzhen518000 China

ISBN: (纸本)9798350314465

Nuclear energy is presently the clean energy source most likely to massively displace fossil energy, and the secondary side of the steam generator is an important part of a nuclear power plant. Due to the small space of the secondary side of the steam generator and the confinement of the vessel, the precise positioning of the robot inside the steam generator cannot be achieved by a single sensor alone. This paper introduces a multi-sensor fusion steam generator secondary side inspection robot. Primary emphasis is on data fusion of multiple sensors, such as laser sensors, cameras, IMU, and wheel encoder. First of all, this paper integrates data from wheel encoder data and IMU data by using extended Kalman filtering (EKF), which decreases the drift error during the motion and enhances the robot positioning precision. Afterwards, we incorporate laser ranging sensors and camera picture data to enhance the overall spatial sensitivity of the robot through particle filtering algorithms. Experiments show that the robot works reliably and has high positioning accuracy. © 2023 IEEE.

关键词： Steam generators

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Recent status and future perspectives of ZnIn_(2)S_(4) for energy conversion and environmental remediation

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Chinese Chemical Letters 2023年第7期34卷 45-57页

作者： Mengzhu Li Longlu Wang Xinyu Zhang Weinan Yin Yingbo Zhang Jingwen Li Ziyang Yin Yuntao Cai Shujuan Liu Qiang Zhao College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology).Nanjing University of Posts and Telecommunications(NUPT) Nanjing 210023China State Key Laboratory of Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts and TelecommunicationsNanjing 210023China School of Geographic and Biologic Information Nanjing University of Posts and TelecommunicationsNanjing 210023China

Zinc indium sulfide (ZnIn_(2)S_(4)),a novel photocatalyst,has attracted considerable attention and been extensively studied over the past few years owing to its various advantages such as nontoxicity,structural stability,easy availability,suitable band gap and fascinating photocatalytic *** review mainly focuses on the recent state-of-art progress of ZnIn_(2)S_(4)-based ***,we briefly introduced preparation methods of ZnIn_(2)S_(4) with diverse morphological ***,considering the photocatalytic activity of pristine ZnIn_(2)S_(4) would be confined by rapid recombination of photo-generated electronhole pairs and limited light absorption range,different modulation strategies such as layer and size control,doping,vacancy engineering and hetero-nanostructures were expounded in ***,the applications of ZnIn_(2)S_(4) in various fields such as H_(2) production,CO_(2) reduction,value-added products synthesis,pollutant purification and N_(2) fixation are clearly *** the end,we sorted out the conclusions and outlook,aiming to provide some new insights for this fascinating material.

关键词： ZnIn_(2)S_(4) Photocatalysis Energy conversion Environmental remediation Hydrogen evolution

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The 2^(nd)Asian Conference on Porphyrins,Phthalocyanines and Related Materials

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Chinese Chemical Letters 2024年第7期35卷 1-3页

作者： Gaojie Zhu Zhen Yang Shijun Li Weihua Zhu Rui Cao Junlong Zhang Jianzhang Zhao Jonathan L.Sessler Xunjin Zhu Jianxin Song Yongshu Xie Jianzhuang Jiang Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry and Molecular EngineeringEast China University of Science&TechnologyShanghai 200237China College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material Technology of Ministry of EducationHangzhou Normal UniversityHangzhou 311121China School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang 212013China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi'an 710119China Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Fine Chemicals Frontier Science Center for Smart MaterialsSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China Department of Chemistry The University of TexasAustinTexas 78712-1224United States Department of Chemistry and Institute of Advanced Materials Hong Kong Baptist UniversityHong Kong 999077China Key Laboratory of Chemical Biology and Traditional Chinese Medicine(Ministry of Educational of China) Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan ProvinceCollege of Chemistry and Chemical EngineeringHunan Normal UniversityChangsha 410081China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline MaterialsDepartment of Chemistry and Chemical EngineeringSchool of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083China

In the past decades,porphyrins,phthalocyanines and related materials have attracted significant attention due to their diverse and brilliant structures[1,2],as well as their unique electronic structures and photophysi... 详细信息

关键词： cyanine phthalocyanine Porphyrin

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Bio-inspired thermoelectric cement with interfacial selective immobilization towards self-powered buildings

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Science Bulletin 2025年第12期70卷 1994-2003页

作者： Wang, Yulin Zheng, Yangzezhi Li, Weihuan Xiao, Shuai Chen, Shengjun Xing, Jiarui Xiong, Chenchen Zhou, Yang Zhang, Wei Hihara, Takehiko Moloto, Nosipho Miao, Changwen State Key Laboratory of Engineering Materials for Major Infrastructure School of Materials Science and Engineering Southeast University Nanjing211189 China School of Transportation Southeast University Nanjing211189 China Jiangsu Key Laboratory of Advanced Metallic Materials School of Materials Science and Engineering Southeast University Nanjing211189 China Department of Physical Science and Engineering Nagoya Institute of Technology Aichi 466-8555 Japan School of Chemistry University of the Witwatersrand Johannesburg999136 South Africa

Buildings and infrastructure significantly contribute to global energy consumption and CO2 emissions. Transforming cement, the most widely used construction material, into a functional medium for heat harvesting presents a promising avenue to offset the energy demands of buildings. The disparity in diffusion rate between cations and anions within cement pore solution due to variations in interactions with pore walls, endows cement with inherent ionic thermoelectric properties. However, the isolation of pores by the dense cement matrix hinders the rapid transportation of ions with superior diffusion rates, impeding the enhancement of mobility difference between ions and limiting the enhancement of Seebeck coefficient. Inspired by the stem structure of plants, we present a cement-polyvinyl alcohol (PVA) composite (CPC) featuring aligned cement and PVA hydrogel layers. While PVA hydrogel layers provide ion diffusion highways for OH− ions, cement-PVA interfaces establish strong coordination bonds with Ca2+ ions and weaker interactions with OH− ions, enabling selective immobilization, which amplifies the diffusion rate disparity between Ca2+ and OH−. The CPC's multilayer structure yields abundant interfaces, providing ample interaction sites that maximize the contribution of cement ions to thermoelectric performance. The as-prepared composite achieves an impressive Seebeck coefficient of −40.5 mV/K and a figure of merit (ZT) of 6.6 × 10−2. Due to the engineered multilayer structure, the CPC also demonstrates superior mechanical strength and intrinsic energy storage potential, which has been assembled into a self-powered architecture. The biomimetic structure and interfacial selective immobilization mechanism may pave the way for the design and fabrication of high-performance ionic thermoelectric materials. © 2025 Science China Press

关键词： Cements

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SVM-based Fault Detection Method for Air Conditioners in EMU Train 7

SVM-based Fault Detection Method for Air Conditioners in EMU...

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7th International Conference on Data Science and Information technology, DSIT 2024

作者： Wei, Rongjiao Pan, Chao Wei, Pu An, Yangyang Zhu, Hao Wang, Mulan Nanjing Institute of Technology School of Communications and Information Engineering Nanjing China China Railway Shanghai Group Co. Ltd. Nanjing EMU Depot Nanjing China Nanjing Institute of Technology Jiangsu Key Laboratory of Advanced Numerical Control Technology Nanjing China

ISBN: (纸本)9798350384093

In this paper, we introduce and experimentally demonstrate a fault detection method for the air conditioner in the EMU train, which usually generates abnormal sounds when the faults occur. The technique utilizes the Support Vector Machine (SVM) to recognize the time-frequency characteristics of the sound generated by the air conditioner, which is extracted using the short-time Fourier transform (STFT). In addition, a detection system is built for the experiment, in which an FPGA and an embedded system are employed for sound acquisition and acoustic signal process, respectively. The penalty factor of the SVM model is optimized and accuracy of 0.977 is achieved. Our method will improve the efficiency and accuracy of fault detection for the air conditioner in the EMU train. © 2024 IEEE.

关键词： Support vector machines

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