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Science China(Technological Sciences) 2016年第10期59卷 1537-1548页

作者： ZHANG JinZhong JIANG Kai hu zhigao Chu JunHao Department of Electronic Engineering East China Normal University

As relaxor ferroelectric functional materials, their crystal structures depend on temperature, component, electric filed, pressure, and so on, which are important for the applications of sensors, transducers, and actuators. For the case of PbTiO3-based ferroelectrics Pb（Zn2/3Nb2/3）O3-PbTiO3, Pb（Mg1/3Nb2/3）O3-PbTiO3, Pb（In1/2Nb1/2）O3-Pb（Mgu3Nb2/3）O3-PbTiO3 and some other crystals, they have been extensively investigated due to the excellent electromechanical and piezoelectric properties. Generally, ferroelectric crystal structure and corresponding phase diagram are detected by temperature-dependent high resolution X-ray diffraction, low frequency dielectric permittivity, and domain structures. In this review, we focus on the novel condensed matter spectroscopy （i.e., spectroscopic ellipsometry, transmittance, photoluminescence spectra as well as Raman spectra）, which is nondestructive, noncontact, and sensitive optical techniques for probing symmetries, phase transitions and phase diagrams of ferroelectric crystals. Besides, it can supply some other physical and chemical information for ferroelectric and semiconductor functional materials such as optical band gap, electronic transitions, dielectric functions, optical conductivity, absorption, pho- non modes, lattice dynamics as functions of temperature and PT composition.

关键词： ferroelectrics phase diagram Raman scattering ellipsometric spectroscopy transmittance photoluminescence

Non-Hermitian polarization quantized by time-reversal symmetry

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Science China(Physics,Mechanics & Astronomy) 2024年第12期67卷 141-147页

作者： Jing Cheng Jinbing hu zhigao hu Lin Chen Minghui Lu Songlin Zhuang Technical Center for Multifunctional Magneto-Optical Spectroscopy(Shanghai) Engineering Research Center of Nanophotonics&Advanced Instrument(Ministry of Education)Department of Physics and Electronic ScienceEast of China Normal UniversityShanghai200241China College of Optical-Electrical Information and Computer Engineering University of Shanghai for Science and TechnologyShanghai200093China Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan430074China National Laboratory of Solid State Microstructures Science and Engineering Nanjing UniversityNanjing210093China

It is well known that in one-dimensional(1D) crystalline insulators,the electric polarization is a manifestation of Berry phase,which can not be quantized by time-reversal symmetry(TRS) as in Hermitian physics TRS does not induce any topological phase in one *** this paper we report that even though associated with complex eigenenergies a 1D non-Hermitian insulator obeying only TRS is capable of presenting quantized bulk *** underlying physical reason is unveiled:TRS guarantees the complex energies to come in pair(E,E*),and the corresponding decaying and amplifying wave functions also come in pair and have the same variation rate,hence,giving rise to a stable wannier *** electron transport is performed by means of charge pumping process,which verifies the physical mechanism *** last,we discuss the possible experimental implementation of the proposed model by means of twisted-π gauge flux.

关键词： non-Hermitian polarization time-reversal symmetry complex hopping

Numerical study on critical flow velocity of ice slurry in the pipe of ice source heat pump system

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Energy and Built Environment 2024年第4期5卷 607-614页

作者： Tao Wu Na Zhu zhigao hu Zhenyu Luo Pingfang hu Fei Lei School of Environmental Science and Engineering Huazhong University of Science and TechnologyWuhanHubei 430074China hubei Fengshen Purification Air Conditioning Equipment Engineering Company Limited WuhanHubei 430074China

The traditional evaporator of water source heat pump system is easy to freeze when the water source temperature is too low in winter.A novel ice source heat pump system is proposed,which can use low temperature surface water to supply heat to *** of the key problems for safe transportation is velocity range of ice slurry in ice outlet *** order to study the critical flow velocity of ice slurry in the pipe,an Euler model of horizontal straight pipe and 90°elbow pipe were established by Fluent *** influence of five factors on the critical flow velocity of two kinds of pipes,including initial ice packing fraction,ice particle size,pipe diameter,length of straight pipe and radius curvature of elbow was *** found that the initial ice content should be controlled from 10%to 15%.The inlet flow rate was 20%higher than the critical flow rate under the most unfavorable *** particle size was less than 0.2 *** total length of ice discharge pipeline was less than 50 *** radius of the bend should be met the minimum requirements of the specification of the pipe used.

关键词： Ice slurry Ice packing fraction Flow in pipeline Critical velocity

Designing silver niobate-based relaxor antiferroelectrics for ultrahigh energy storage performance

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Journal of Advanced Ceramics 2024年第8期13卷 1282-1290页

作者： Zhengdong hu Zhen Liu Bing Han Haonan Peng Kai Da Zequan Xu Zhengqian Fu zhigao hu Genshui Wang Key Laboratory of Inorganic Functional Materials and Devices Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Physics and Electronic Science East China Normal UniversityShanghai 200241China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China

AgNbO_(3)(AN)and modified AgNbO_(3) have been extensively investigated as promising lead-free antiferroelectric(AFE)energy storage *** studies have focused mainly on the use of an ion dopant at the A/B site to obtain a stabilized AFE phase;however,simultaneous improvements in the recoverable energy storage density(Wrec)and efficiency(n)are stll difficult to ***,we innovatively constructed a AgNbO_(3)-NaNbO_(3)-(Sr_(0.7)Bi_(0.2))TiO_(3)(AN-NN-SBT)ternary solid solution to achieve a relaxor AFE in AgNbO_(3)-based *** coexistence of antiferroelectric(M3)and paraelectric(O)phases in 0.8(0.7AgNbO_(3)-0.3NaNbO_(3))-0.2(Sro.7Bio.2)TiO_(3) confirms the successful realization of a relaxor AFE,attributed to multiple ion occupation at the A/B ***,a high Wrec of 7.53 ***^(-3) and n of 74.0% are acquired,together with superior stability against various temperatures,frequencies,and cycling ***,a high power density(298.7 MW·cm^(-3))and fast discharge speed(41.4 ns)are also demonstrated for the AgNbO_(3)-based relaxor *** work presents a promising energy storage AgNbO_(3)-based ternary solid solution and proposes a novel strategy for AgNbO_(3)-based energy storage via the design of relaxor AFE materials.

关键词： AgNbO_(3)(AN)-based ceramics relaxor antiferroelectric(RAFE) paraelectric(PE) energy storage performance

Light control of droplets on photo-induced charged surfaces

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National Science Review 2023年第1期10卷 259-267页

作者： Fang Wang Meijin Liu Cong Liu Chao huang Lidong Zhang Anyang Cui zhigao hu Xuemin Du Institute of Biomedical and Health Engineering Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences University of Chinese Academy of Sciences Department of Chemistry and Molecular Engineering East China Normal University Technical Center for Multifunctional Magneto-Optical Spectroscopy(Shanghai) Engineering Research Center of Nanophotonics and Advanced Instrument(Ministry of Education)Department of Physics School of Physics and Electronic Science East China Normal University

The manipulation of droplets plays a vital role in fundamental research and practical applications,from chemical reactions to *** an intriguing and active format,light control of droplets,typically induced by photochemistry,photomechanics,light-induced Marangoni effects or light-induced electric fields,enables remote and contactless control with remarkable spatial and temporal ***,current light control of droplets suffers from poor performance and limited *** we develop a new superamphiphobic material that integrates the dual merits of light and electric field by rationally preparing liquid metal particles/poly(vinylidene fluoride-trifluoroethylene) polymer composites with photo-induced charge generation capability in real time,enabling light control of droplets on the basis of photo-induced dielectrophoretic *** demonstrate that this photo-induced charged surface(PICS)imparts a new paradigm for controllable droplet motion,including high average velocity(～35.9 mm s-1),unlimited distance,multimode motions(***,backward and rotation) and single-to-multiple droplet manipulation,which are otherwise unachievable in conventional *** further extend light control of droplets to robotic and bio-applications,including transporting a solid cargo in a closed tube,crossing a tiny tunnel,avoiding obstacles,sensing the changing environment via naked-eye color shift,preparing hydrogel beads,transporting living cells and reliable *** PICS not only provides insight into the development of new smart interface materials and microfluidics,but also brings new possibilities for chemical and biomedical applications.

关键词： light control droplet manipulation smart surface liquid metal ferroelectric

Two-dimensional mesoporous sensing materials

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Chinese Chemical Letters 2020年第2期31卷 521-524页

作者： Yu Wen Facai Wei Wenqian Zhang Anyang Cui Jing Cui Chengbin Jing zhigao hu Qingguo He Jianwei Fu Shaohua Liu Jiangong Cheng State Key Laboratory of Precision Spectroscopy&School of Physics and Materials Science East China Normal UniversityShanghai 200241China Key Laboratory of Polar Materials and Devices(MOE)and Technical Center for Multifunctional Magneto-Optical Spectroscopy(Shanghai) Department of Electronic EngineeringEast China Normal UniversityShanghai 200241China State Key Lab of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450052China

Two-dimensional mesoporous materials combing ultrathin nanosheet morphology with well-defined mesoporous structures,are now emerging and becoming increasingly important for their promising applications in energy storage,electronic devices,electrocatalysts and so ***,we synthesized a kind of polypyrrole-based two-dimensional mesoporous materials with uniform pore size,ultrathin thickness and high surface *** for electrochemical NH3 sensor,they exhibited a fast response and high ***,our study would promote much interest in design of new materials for gas sensor applications.

关键词： Two-dimensional materials Mesoporous polymer Polypyrrole Chemical sensing Self-assembly

Ultrathin NiO/Ni_(3)S_(2)Heterostructure as Electrocatalyst for Accelerated Polysulfide Conversion in Lithium-Sulfur Batteries

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Energy & Environmental Materials 2023年第6期6卷 182-190页

作者： Chunqiao Jin Pengbo Zhai Jianli Tang Liuxiang huo Qianqian He Yan Ye Lingxi Qiu Kai Jiang Liyan Shang Yawei Li Yongji Gong zhigao hu Junhao Chu Department of Materials School of Physics and Electronic ScienceTechnical Center for Multifunctional Magneto-Optical Spectroscopy(Shanghai)Engineering Research Center of Nanophotonics&Advanced Instrument(Ministry of Education)East China Normal UniversityShanghai 200241China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan Shanxi 030006China School of Materials Science and Engineering Beihang UniversityBeijing 100191China

The practical application of Lithium-Sulfur batteries largely depends on highly efficient utilization and conversion of sulfur under the realistic condition of high-sulfur content and low electrolyte/sulfur *** design of heterostructure electrocatalysts with abundant active sites and strong interfacial electronic interactions is a promising but still challenging strategy for preventing shuttling of polysulfides in lithium-sulfur ***,ultrathin nonlayered NiO/Ni_(3)S_(2)heterostructure nanosheets are developed through topochemical transformation of layered Ni(OH)_(2)templates to improve the utilization of sulfur and facilitate stable cycling of *** a multifunction catalyst,NiO/Ni_(3)S_(2)not only enhances the adsorption of polysulfides and shorten the transport path of Li ions and electrons but also promotes the Li_(2)S formation and transformation,which are verified by both in-situ Raman spectroscopy and electrochemical ***,the cell with NiO/Ni_(3)S_(2)as electrocatalyst delivers an area capacity of 4.8 mAh cm^(-2)under the high sulfur loading(6 mg cm^(-2))and low electrolyte/sulfur ratio(4.3 pL mg^(-1)).The strategy can be extended to 2D Ni foil,demonstrating its prospects in the construction of electrodes with high gravimetric/volumetric energy *** designed electrocatalyst of ultrathin nonlayered heterostructure will shed light on achieving high energy density lithium-sulfur batteries.

关键词： density functional theory simulation Li-S batteries multifunction electrocatalyst NiO/Ni_(3)S_(2)heterostructures ultrathin nonlayered nanosheets

High pressure phase boundaries of AgNbO_(3)

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Journal of Materiomics 2024年第2期10卷 431-439页

作者： Kai Dai Anyang Cui Yafang Li Zhen Liu Yuting Yan Kai Jiang Jinzhong Zhang Liyan Shang Liangqing Zhu Yawei Li Genshui Wang zhigao hu Technical Center for Multifunctional Magneto-Optical Spectroscopy(Shanghai) Engineering Research Center of Nanophotonics&Advanced Instrument(Ministry of Education)Department of PhysicsSchool of Physics and Electronic ScienceEast China Normal UniversityShanghai200241China Key Laboratory of Optoelectronic Material and Device Department of PhysicsShanghai Normal UniversityShanghai200234China Chongqing Key Laboratory of Precision Optics Chongqing Institute of East China Normal UniversityChongqing401120China Key Laboratory of Inorganic Functional Materials and Devices Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuanShanxi030006China

The external pressure is one of the essential parameters for regulating the structure and energy con-version properties of antiferroelectric AgNbO_(3).For pure AgNbO_(3),however,there has been still a blank of its real lattice structure under the stress ***,high-pressure lattice structures and phase transitions of AgNbO_(3)have been explored by spectroscopic experiments and theoretical models.A successive phase transition process from Pbcm to C222_(1) to P2_(1) has been observed at the pressure range of 0-30 GPa,associated with displacive-type characterized by soft-mode *** that the paraelectric phase cannot be achieved under high-pressure at room ***,the competition of long-range Coulomb force,short-range interatomic interaction,and covalent interaction in AgNbO_(3)lattice were demonstrated under the stress *** present work can provide fundamental guidelines to reveal the high-pressure phase transitions of AgNbO_(3),which will open up possibilities for the designing device with functional properties at extremes.

关键词： temperature field phase

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红外偏振效应和偏振遥感研究进展

遥感学报 2018年第6期22卷 926-934页

作者：褚君浩胡志高中国科学院上海技术物理研究所红外物理国家重点实验室上海200083 华东师范大学信息科学技术学院电子工程系上海200241

光的偏振信息在当前快速发展的光电子学和光学研究中是缺失的,利用偏振特征不仅可以提取探测物和研究对象的额外信息,而且延伸了探测的维度和提高了灵敏度。本文主要从基础研究和应用研究两个方面分析讨论红外偏振效应测量技术及红外遥... 详细信息

光的偏振信息在当前快速发展的光电子学和光学研究中是缺失的,利用偏振特征不仅可以提取探测物和研究对象的额外信息,而且延伸了探测的维度和提高了灵敏度。本文主要从基础研究和应用研究两个方面分析讨论红外偏振效应测量技术及红外遥感的若干进展,期望从不同的角度来考察偏振效应所带来的潜在应用。在上述背景下,本文介绍了红外椭圆偏振光谱技术及其在探测无机和有机薄膜体系光学性质的应用,并且归纳了红外偏振光学仪器理论及相关进展,特别是在空间遥感上的应用潜力。

关键词：红外偏振椭圆偏振光谱遥感

Application of Ant Colony Algorithm in Fingerprint Identification System Based on Internet of Things

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Application of Ant Colony Algorithm in Fingerprint Identific...