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Hydrogen FBG Sensor Using Pd/Ag Film With Application in Propulsion System Fuel Tank Model of Aerospace Vehicle

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Photonic Sensors 2014年第3期4卷 254-264页

作者： Said SAAD Lotfi HASSINE Vassim ELFAHEM group of electronics and quantum physics Laboratory of Advanced Materials and Quantum Phenomena Faculty ofSciences of Tunis 2092 Tunisia National Institute of Applied Sciences and Technology University of Carthage North Urban Center of Tunis-B.P. 676Cedex Tunis 1080 Tunisia Regio iT Gesellschaft mit beschrankter Hafiung Aachen Germany

The high efficiency hydrogen fiber Bragg grating （FBG） sensor is presented. The sensitive film was a new alliance of palladium-silver （Pd-Ag）. In addition, the titanium （Ti） layer was used as the adhesive layer. The presented sensor showed the resolution of more than 60pm/1%H2, and a fast response time of4s - 5s was guaranteed in the 0.1%H2 - 4%H2 range. Moreover, the life time of the sensor was investigated. The obtained results showed that the sensor had an enhanced life time. Furthermore, the sensor was applied in the propulsion system fuel tank model of the aerospace vehicle. The obtained results indicated that it is a prevention system against the disaster aerospace due to hydrogen leakage.

关键词： Hydrogen fiber Bragg grating palladium-silver faster response time propulsion system fuel tank prevention system hydrogen leakage

From Claringbullite to a New Spin Liquid Candidate Cu_3Zn(OH)_6FCl

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Chinese physics Letters 2019年第1期36卷 70-74页

作者： Zili Feng Wei Yi Kejia Zhu Yuan Wei Shanshan Miao Jie Ma Jianlin Luo Shiliang Li Zi Yang Meng Youguo Shi Beijing National laboratory of Condensed Matter physics and Institute of Physics Chinese Academy of Sciences School of Physical Sciences University of Chinese Academy of Sciences Nano electronics Device materials group National Institute for Materials Science (NIMS) Key laboratory of Artificial Structures and quantum Control School of Physics and Astronomy Shanghai Jiao Tong University Collaborative Innovation Center of advanced Microstructures Collaborative Innovation Center of quantum Matter CAS Center of Excellence in Topological quantum Computation and School of Physical Sciences University of Chinese Academy of Sciences Songshan Lake materials laboratory

The search for quantum spin liquid(QSL) materials has attracted significant attention in the field of condensed matter physics in recent years, however so far only a handful of them are considered as candidates hosting QSL ground state. Owning to their geometrically frustrated structures, Kagome materials are ideal systems to realize QSL. We synthesize the kagome structured material claringbullite(Cu_4(OH)_6FCl) and then replace inter-layer Cu with Zn to form Cu_3Zn(OH)_6FCl. Comprehensive measurements reveal that doping Zn^(2+) ions transforms magnetically ordered Cu_4(OH)_6FCl into a non-magnetic QSL candidate Cu_3Zn(OH)_6FCl. Therefore,the successful syntheses of Cu_4(OH)_6FCl and Cu_3Zn(OH)_6FCl provide not only a new platform for the study of QSL but also a novel pathway of investigating the transition between QSL and magnetically ordered systems.

关键词： Clarinbrey stone Cu3Zn(OH)6FCl QSL

Field-Induced Metal–Insulator Transition inβ-EuP3

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Chinese physics Letters 2020年第10期37卷 87-91页

作者： Guangqiang Wang Guoqing Chang Huibin Zhou Wenlong Ma Hsin Lin MZahid Hasan Su-Yang Xu Shuang Jia International Center for quantum materials School of PhysicsPeking UniversityBeijing 100871China laboratory of Topological quantum Matter and advanced Spectroscopy(B7) Department of PhysicsPrinceton UniversityPrincetonNJ 08544USA Institute of physics Academia SinicaTaipei 11529China Lawrence Berkeley National laboratory BerkeleyCA 94720USA Department of physics Massachusetts Institute of TechnologyCambridgeMassachusetts 02139USA Collaborative Innovation Center of quantum Matter Beijing 100871China CAS Center for Excellence in Topological quantum Computation University of Chinese Academy of SciencesBeijing 100190China Beijing Academy of quantum Information Sciences Beijing 100193China

Metal–insulator transition(MIT)is one of the most conspicuous phenomena in correlated electron *** such a transition has rarely been induced by an external magnetic field as the field scale is normally too small compared with the charge *** present the observation of a magnetic-field-driven MIT in a magnetic semiconductorβ-EuP ***,we find a colossal magnetoresistance in an extreme way:the resistance drops billionfold at 2 K in a magnetic field less than 3 *** ascribe this striking MIT as a field-driven transition from an antiferromagnetic and paramagnetic insulator to a spin-polarized topological semimetal,in which the spin configuration of Eu 2+cations and spin-orbital coupling play a crucial *** a phosphorene-bearing compound whose electrical properties can be controlled by the application of field,β-EuP 3 may serve as a tantalizing material in the basic research and even future electronics.

关键词： Transition transition extreme

Topology and ferroelectricity in group-V monolayers

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Chinese physics B 2020年第5期29卷 1-12页

作者： Mutee Ur Rehman Chenqiang Hua Yunhao Lu State Key laboratory of Silicon materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Zhejiang Province Key laboratory of quantum Technology and Device Department of PhysicsZhejiang UniversityHangzhou 310027China

The group-V monolayers(MLs)have been studied intensively after the experimental fabrication of two-dimensional(2D)graphene and black *** observation of novel quantum phenomena,such as quantum spin Hall effect and ferroelectricity in group-V elemental layers,has attracted tremendous attention because of the novel physics and promising applications for nanoelectronics in the 2D *** this review,we comprehensively review recent research progress in engineering of topology and ferroelectricity,and several effective methods to control the quantum phase transition are *** then introduce the coupling between topological orders and ferroelectric *** research directions and outlooks are discussed at the end of the *** is expected that the comprehensive overview of topology and ferroelectricity in 2D group-V materials can provide guidelines for researchers in the area and inspire further explorations of interplay between multiple quantum phenomena in low-dimensional systems.

关键词： topology ferroelectricity two-dimensional material group-V element

Triggering triplet excitons of carbon nanodots through nanospace domain confinement for multicolor phosphorescence in aqueous solution

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Nano Research 2024年第7期17卷 6534-6543页

作者： Ya-Chuan Liang Qing Cao Yuan Deng Yong Wang Kai-Kai Liu Chong-Xin Shan School of electronics and Information Zhengzhou University of Light IndustryZhengzhou 450002China Henan Key laboratory of Diamond Optoelectronic Material and Devices Key Laboratory of Material PhysicsMinistry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China Academy for quantum Science and Technology Zhengzhou University of Light IndustryZhengzhou 450002China Institute of quantum materials and physics Henan Academy of SciencesZhengzhou 450046China

Easy non-radiative decay property of long-lived triplet excitons in aqueous solution obstructs their applications in aquatic *** reported phosphorescence phenomena in aqueous solution have excited researchers enormously but achieving full-color water-soluble phosphorescent carbon nanodots(CNDs)is still a challenging ***,full-color phosphorescence of water-soluble CNDs has been demonstrated by triggering their triplet excitons through nanospace domain confinement,and Förster energy resonance transfer is used for further tuning phosphorescence *** phosphorescence spans across most of the visible spectrum,ranging from 400 to 700 *** an aqueous solution,the CNDs exhibits blue,green,and red phosphorescence,lasting for approximately 6,10,and 7 s,***,the phosphorescence quantum yields are 11.85%,8.6%and 3.56%,making them readily discernible to the naked eyes and laying a solid foundation for practical ***,phosphorescence flexible optical display and bioimaging have been demonstrated by using the multicolor CNDs-based nanomaterials,showing distinct superiority for accuracy and complete display and imaging in complex emission background.

关键词： carbon nanodots triplet excitons multicolor aqueous solution

Resonant tunneling in disordered borophene nanoribbons with line defects

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npj Computational materials 2022年第1期8卷 1230-1237页

作者： Pei-Jia Hu Si-Xian Wang Xiao-Feng Chen Zeng-Ren Liang Tie-Feng Fang Ai-Min Guo Hui Xu Qing-Feng Sun Hunan Key laboratory for Super-microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha410083China School of Physical Science and Technology Lanzhou UniversityLanzhou730000China School of Sciences Nantong UniversityNantong226019China International Center for quantum materials School of PhysicsPeking UniversityBeijing100871China Collaborative Innovation Center of quantum Matter Beijing100871China CAS Center for Excellence in Topological quantum Computation University of Chinese Academy of SciencesBeijing100190China

Recently,borophene has attracted extensive interest as the wonder material,showing that line defects(LDs)occur widely at the interface between V_(1/5)and V_(1/6)boron ***,we study theoretically the electron transport through two-terminal disordered borophene nanoribbons(BNRs)with random distribution of *** results indicate that LDs strongly affect the electron transport properties of *** V_(1/5)and V_(1/6)BNRs exhibit metallic behavior without any LD,in agreement with *** in the presence of LDs,the overall electron transport ability is dramatically decreased,but some resonant peaks of conductance quantum are found in the transmission spectrum of any disordered BNR with arbitrary arrangement of *** disordered BNRs exhibit metal-insulator transition with tunable transmission gap in the insulating ***,two evolution phenomena of resonant peaks are revealed for disordered BNRs with different *** results may help for understanding structure-property relationships and designing LD-based nanodevices.

关键词： tunneling boron resonant

Single crystal growth and characterization of 166-type magnetic kagome metals

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Chinese physics B 2024年第9期33卷 145-150页

作者： Huangyu Wu Jinjin Liu Yongkai Li Peng Zhu Liu Yang Fuhong Chen Deng Hu Zhiwei Wang Centre for quantum physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081China Beijing Key laboratory of Nanophotonics and Ultrafine Optoelectronic Systems Beijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Zhuhai 519000China Material Science Center Yangtze Delta Region Academy of Beijing Institute of TechnologyJiaxing 314011China

Kagome magnets were predicted to be a good platform to investigate correlated topology band structure,Chern quantum phase,and geometrical frustration due to their unique lattice *** we reported single crystal growth of 166-type kagome magnetic materials,including HfMn_(6)Sn_(6),ZrMn_(6)Sn_(6),GdMn_(6)Sn_(6)and GdV_(6)Sn_(6),by using the flux method with Sn as the *** them,HfMn_(6)Sn_(6)and ZrMn_(6)Sn_(6)single crystals were grown for the first time.X-ray diffraction measurements reveal that all four samples crystallize in HfFe6Ge6-type hexagonal structure with space group P6/*** samples show metallic behavior from temperature dependence of resistivity measurements,and the dominant carrier is hole,except for GdV6Sn6 which is electron *** samples have magnetic order with different transition temperatures,HfMn_(6)Sn_(6),ZrMn_(6)Sn_(6)and GdV_(6)Sn_(6)are antiferromagnetic with TN of 541 K,466 K and 4 K respectively,while GdMn_(6)Sn_(6)is ferrimagnetic with the critical temperature of about 470 *** study will enrich the research platform of magnetic kagome materials and help explore the novel quantum phenomena in these interesting *** dataset of specific crystal structure parameters for HfMn_(6)Sn_(6)are available in Science Data Bank,with the link.

关键词： kagome metal single crystal growth crystal structure physical property

Growth and properties of wide spectral white light emitting diodes

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Chinese physics B 2011年第11期20卷 414-416页

作者：谢自力张荣傅德颐刘斌修向前华雪梅赵红陈鹏韩平施毅郑有炓 School of electronics and Engineering Provincial Key Laboratory of Advanced Photonic and Electronic MaterialsNanjing University

Wide spectral white light emitting diodes have been designed and grown on a sapphire substrate by using a metal-organic chemical vapor deposition system. Three quantum wells with blue-light-emitting, green-light-emitting and red-light-emitting structures were grown according to the design. The surface morphology of the film was observed by using atomic force microscopy. The films were characterized by their photoluminescence measurements. X-ray diffraction t9/2/9 scan spectroscopy was carried out on the multi-quantum wells. The secondary fringes of the symmetric ω/2θ X-ray diffraction scan peaks indicate that the thicknesses and the alloy compositions of the individual quantum wells are repeatable throughout the active region. The room temperature photoluminescence spectra of the structures indicate that the white light emission of the multi-quantum wells is obtained. The light spectrum covers 400 700 nm, which is almost the whole visible light spectrum.

关键词： metal-organic chemical vapor deposition GaN/InGaN multi-quantum wells group Ⅲ-Ⅴsemiconductor, wide spectral white light

Intriguing one-dimensional electronic behavior in emerging two-dimensional materials

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Nano Research 2021年第11期14卷 3810-3819页

作者： Xuan Song Teng Zhang Huixia Yang Hongyan Ji Jiatao Sun Liwei Liu Yeliang Wang Hongjun Gao School of Information and electronics MIIT Key Laboratory for Low-Dimensional Quantum Structure and DevicesBeijing Institute of TechnologyBeijing100081China Institute of physics Chinese Academy of SciencesBeijing100190China

Tomonaga-Luttinger liquid(TLL),a peculiar one-dimensional(1D)electronic behavior due to strong correlation,was first studied in 1D nanostructures and has attracted significant attention over the last several *** the rise of new two-dimensional(2D)quantum materials,1D nanostructures in 2D materials have provided a new platform with a well-defined configuration at the atomic scale for studying TLL electronic *** this paper,we review the recent progress of TLL electronic features in emerging 2D materials embedded with various 1D nanostructures,including island edges,domain walls,and 1D moiré***,novel physical phenomena,such as 1D edge states in 2D transition metal dichalcogenides(TMDs),helical TLL in 2D topological insulators(2DTI),and chiral TLL in 2D quantum Hall systems,are described and discussed at the *** also analyze challenges and opportunities at the frontier of this research area.

关键词： One-dimensional electronic system Tomonaga-Luttinger liquid two-dimensional materials edge states domain wall