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Chinese Chemical Letters 2020年第9期31卷 2499-2502页

作者： Chao Zhang Tingting Li Lei Pu weijia wen Xiangdong Luo Lijuan Zhao Materials Genome Institute Shanghai UniversityShanghai 200444China Jiangsu Key Laboratory of ASIC Design Nantong UniversityNantong 226019China State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China

A ternary complex combining dual-phase perovskites-Cs4PbBr6/CsPbBr3(DP-CPB) with ZnSe micropshere s(ZnSe-DP-CPB) was succes s fully prepared using supersaturated recrystallization technique at room *** was showed that the DP-CPB composites were partially embedded in ZnSe microsphere composed with ZnSe *** light absorption range of ZnSe-DP-CPB composites was extended from visible to near infrared *** enhanced luminescence from ZnSe-DP-CPB composite was observed and the excitation power-dependent photoluminescence showed that the recombination involves *** recombination lifetimes of the ternary composites increased compared with DP-CPB composite,indicating that the non-radiative combination was suppressed which maybe possibly due to the decrease of both bulk and surface defects,owing to the passivation of ZnSe,as well as the suitable band alignments of these three *** ternary complex also showed improved stability of photoluminescence(PL),which opens a newavenue for enhancing the stability of PL and optoelectronic applications for semiconductor-perovskite composites.

关键词： Dual-phase perovskites Ternary complex Supersaturated recrystallization Photoluminescence Passivation Optoelectronic

Perspectives on water science: transport and application of confined water

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Science China(Physics,Mechanics & Astronomy) 2014年第5期57卷 829-835页

作者： ZENG XiPing WU JinBo LI ShunBo CHAU YeungYeung HE GuangHong wen weijia YANG GuoZhen Hong Kong University of Science and Technology ChongQing University Institute of Physics Chinese Academy of Sciences

The confinements of water can be divided into two main categories,namely,the confinements on surface or interface and the confinements in bulk *** adding ions or applying electric field,the intensity and distribution of the hydrogen bonds can be greatly *** are collectively known as confinement on water surface or interface,which has potential applications in life science and industries involving evaporation *** bulk water could be found everywhere in nature,such as in granular and porous materials,macromolecules and gels,*** investigation of the physical properties and the transports of the confined bulk water will contribute to understanding certain types of life activities such as the water transport in plant and in new application of extracting the shale oil and water.

关键词： water science confined water surface confined water bulk transport

RhIr@MoS2 nanohybrids based disposable microsensor for the point-of-care testing of NADH in real human serum

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Chinese Chemical Letters 2020年第8期31卷 2115-2118页

作者： Dongqing Ji Zi Ying Yuan Zhang Wei Chen Metini Janyasupab Xinghua Gao Lingyan Feng weijia wen Materials Genome Institute Shanghai UniversityShanghai 200444China State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences.Shanghai 200050China Department of Emergency Tongji HospitalTongji University School of MedicineShanghai 200065China Department of Electronics Engineering King Mongkut's Institute of Technology LadkrabangBangkok 10520Thailand

Dihydronicotinamide adenine dinucleotide(NADH)is an important enzyme in all living cells,which is found to be abnormally expressed in cancer *** it is redox-active,an electrochemical detection method would be suitable for monitoring its concentration in biological *** we present a strategy for specific determination of NADH in real human serum by using RhIr@MoS2 nanohybrids based *** implement the protocol,RhIr nanocrysrals are in-situ grown onto MoS2 interlayers forming a nanohybrid structure(RhIr@MoS2).After being locally deposited on an electrochemical microsensor,it could be used for the analysis of *** developed RhIr@MoS2 nanohybrids based microsensor possesses the ability for analyzing NADH at the applied potential of 0.07 V(much lower than most reported values).The detection limit is evaluated as low as 1 nmol/L even in bovine serum albumin(BSA)*** addition,the sampling analysis of human serum from cancer patients and health controls shows that the microsensor displays good diagnostic sensitivity and specificity,illustrating that this developed detection technique is a relatively accurate method for measuring NADH in biological *** proposed electrochemical microsensor assay also owns the benefits of convenience,disposable and easy processing,which make it a great possibility for future point-of-care cancer diagnosis.

关键词： MoS2 Nanohybrid Electrochemical microsensor Point-of-care(POC)test Cancer diagnosis

Split-Ring Structured All-Inorganic Perovskite Photodetector Arrays for Masterly Internet of Things

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Nano-Micro Letters 2023年第1期15卷 25-42页

作者： Bori Shi Pingyang Wang Jingyun Feng Chang Xue Gaojie Yang Qingwei Liao Mengying Zhang Xingcai Zhang weijia wen Jinbo Wu Materials Genome Institute Shanghai UniversityShanghai 200444People’s Republic of China Zhejiang Laboratory Hangzhou 311100People’s Republic of China HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute FutianShenzhenPeople’s Republic of China School of Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA School of Engineering and Applied Sciences Harvard UniversityCambridgeMA 02138USA Department of Physics Shanghai UniversityShanghai 200444People’s Republic of China The Advanced Material Thrust The Hong Kong University of Science and Technology(Guangzhou)GuangzhouPeople’s Republic of China

Photodetectors with long detection distances and fast response are important media in constructing a non-contact human-machine interface for the Masterly Internet of Things(MIT).All-inorganic perovskites have excellent optoelectronic performance with high moisture and oxygen resistance,making them one of the promising candidates for high-performance photodetectors,but a simple,low-cost and reliable fabrication technology is urgently ***,a dual-function laser etching method is developed to complete both the lyophilic split-ring structure and electrode *** novel split-ring structure can capture the perovskite precursor droplet efficiently and achieve the uniform and compact deposition of CsPbBr3 ***,our devices based on laterally conducting split-ring structured photodetectors possess outstanding performance,including the maximum responsivity of 1.44×105 mA W^(−1),a response time of 150μs in 1.5 kHz and one-unit area<4×10-2 *** on these split-ring photodetector arrays,we realized three-dimensional gesture detection with up to 100 mm distance detection and up to 600 mm s^(−1) speed detection,for low-cost,integrative,and non-contact human-machine ***,we applied this MIT to wearable and flexible digital gesture recognition watch panel,safe and comfortable central controller integrated on the car screen,and remote control of the robot,demonstrating the broad potential applications.

关键词： Split-ring Dewetting Perovskite photodetector array Human-machine interface Gesture recognition

Dielectric response of ANb_(2)O_(6)(A = Zn, Co, Mn, Ni) columbite niobates: From microwave to terahertz

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Journal of Advanced Ceramics 2024年第8期13卷 1189-1197页

作者： weijia Luo Shun Wang Siyong Zheng Jining Li Menglong Wang Yongzheng wen ingxia Li Ji Zhou State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Institute of Laser and Optoelectronics School of Precision Instrument and Opto-Electronics EngineeringTianjin UniversityTianjin 300072China Shandong Inspur Artificial Intelligence Research Institute Co. Ltd.Jinan 250013China School of Microelectronics Tianjin UniversityTianjin 300072China

In the upcoming 6-generation(6G)revolution,the achievement of low power consumption has become a key objective in research concerning terahertz *** an important component of passive devices,there are very few low-loss dielectric ceramics in the terahertz *** elucidate the mechanism of loss and promote the application of microwave dielectric ceramics for future 6G technology(covering microwave and terahertz frequencies),the terahertz responses of ANb_(2)O_(6)(A=Zn,Co,Mn,and Ni)columbite niobates were *** influences of magnetic loss on the Qxf values in the microwave range with different transition metal ions in the A-site were reasonably ***,due to the weakened magnetic relaxation properties in the terahertz range,the samples all exhibited low loss and approximate transparency,especially for MnNb_(2)O_(6) and NiNb_(2)O_(6)(tano<0.01 and absorption coefficient<10 cm^(-1) below 1.2 THz),which subverted the definition of traditional low-loss microwave dielectric ***,based on Mie theory,we designed a prototypical broadband metamaterial reflector to validate the applicability of the ANb_(2)O_(6) system in the terahertz band,which is highly important for the development of terahertz ceramic-based passive devices.

关键词： columbite niobates terahertz response transition metal ions magnetic loss ceramic-based metamaterials

On the Spatial Configuration of the Mitotic Spindle

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Chinese Physics Letters 1995年第3期12卷 186-188页

作者： wen weijia SUN Limin LU Kunquan TANG Xiaowei Institute of Physics Academia SinicaBeijing 100080 Institute of High Energy Physics Academia SinicaBeijing 100039

An experimental simulation using electrorheological(ER)fluid is developed to investigate the spatial configuration of the mitotic *** the presence of two different kinds of electric field,the structures of particle arrangement in ER fluid are similar to the configuration of the mitotic spindle of the animal and plant cells respectively.

关键词： Configuration arrangement configuration

Sedimentation upon different carrier liquid in giant electrorheological fluid

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Sedimentation upon different carrier liquid in giant electro...

Cohesive Entanglements and Deformability of UHMWPE

第十二届全国流变学学术会议

作者： YAYING Hong weijia wen Department of Physics the Hong Kong University of Science and Technology

Colloidal stability in giant electrorheological(GER)fluid can influence the GER performance and the fluid flow *** investigated the sedimentation effect of the GER particles suspended in var

关键词： giant electrorheological sedimentation oil synergistic

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Cohesive Entanglements and Deformability of UHMWPE

材料、能源、机械工程中高效的电流变技术——从机理到应用

第二届海峡两岸功能材料科技与产业峰会（2015）

作者： Siu Yeung Cheung weijia wen Ping Gao Department of Chemical and Biomolecular Engineering The Hong Kong University of Science and Technology Department of Physics The Hong Kong University of Science and Technology

Entanglement is an intrinsic property of long chain polymers and determines the viscoelastic properties of polymers in both the molten and solid ***,this is also a concept that is far from being well *** de Gennes,Doi and Edwards,entanglements are considered as topological constraints whereby overlapping polymer chains form knots or hooks and act to restrict chain motion by reptation along a

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Engineering 2023年第5期24卷 151-171,I0004页

作者： Yudai Liang Dongyang Huang Xuefeng Zhou Ziqiu Wang Quan Shi Yaying Hong Huayan Pu Mengying Zhang Jinbo Wu weijia wen Materials Genome Institute Shanghai UniversityShanghai 200444China Zhejiang Laboratory Hangzhou 311100China Fok Ying Tung Research Institute The Hong Kong University of Science and Technology(Guangzhou)Guangzhou 511458China School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200444China Department of Physics Shanghai UniversityShanghai 200444China Department of Physics The Hong Kong University of Science and TechnologyHong Kong 999077China The Advanced Material Thrust The Hong Kong University of Science and Technology(Guangzhou)Guangzhou 511458China

电流变(ER)技术是一种基于电流变效应的先进技术。电流变技术中最常见的材料是电流变液(ERF)。电流变液是一种软物质智能材料,其黏度可以通过施加电场来可逆地调节。电流变液的衍生物、一种新型的电响应软物质材料——电流变弹性体(ERE)... 详细信息

电流变(ER)技术是一种基于电流变效应的先进技术。电流变技术中最常见的材料是电流变液(ERF)。电流变液是一种软物质智能材料,其黏度可以通过施加电场来可逆地调节。电流变液的衍生物、一种新型的电响应软物质材料——电流变弹性体(ERE),由于其不沉降、易封装的优点也得到了越来越多的关注。电流变材料由于其可逆可调、快速响应、低能耗等特性在机械工程中有着广泛的应用。除了基础的电流变材料的合成和应用以外,电流变技术还应用在了能源材料制备、石油运输、储能等诸多领域。电流变技术在能源领域的应用为其在其他领域的潜在应用提供了一个很好的范例。本文结合最新的研究成果,从机理到应用,系统地综述了电流变技术在材料、能源和机械工程等领域的研究现状和未来发展前景。

关键词：电流变技术电流变弹性体电流变材料机械工程石油运输电流变液电流变效应智能材料

Conductance and dielectric properties of pure C_(60) single crystal

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Chinese Science Bulletin 1997年第1期42卷 40-43页

作者： YANG Guoquan, WANG Gang, wen weijia, ZHOU Weiya, LU Kunquan and XIE Sisheng1. Central University for Nationalities, Beijing 100081, China 2. Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China Central University for Nationalities Beijing China Institute of Physics Chinese Academy of Sciences Beijing China

THE C60 is the third stable allotrope of carbon. Much attention has been focused on C60 since it has unique properties. Much work has been carried out on it, such as the preparation of large quantities of C60, the structure studies of C60, the superconducting alkali-metal-C60 compounds, the growth of pure C60 single crystal. There is still a lot of work to do in detail, but because the size of the single ctystal is not large enough, there is some difficulty in research, for example, the electric and optical properties of the C60 single crystal.

关键词： C60 single crystal vapor phase growth conductance dielectric properties.