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Enhanced thermal constant B of diamond films for ultrahigh sensitivity negative temperature coefficient thermistors

Science china Materials 2024年第10期67卷 3321-3329页

作者： Qiao chen Yimeng Zhao Jiawei Li Xiyuan Liu Xinyue Wang Wenxi Zhang Hongwei Zhu Gemmological Institute China University of GeosciencesWuhan 430074China Shenzhen Research Institute China University of GeosciencesShenzhen 518057China state key lab.of new ceramics and Fine processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Southwest United Graduate School Kunming 650500China

negative temperature coefficient(nTc)thermistor plays a crucial role in science research and engineering applications for precise temperature *** great progress has been achieved in nTc materials,enhancing sensitivity and maintaining this high sensitivity along with linearity across extensive temperature ranges remain a significant *** this study,we introduce a diamondbased thermistor(DT)characterized by its outstanding sensitivity,swift response time,and broad temperature monitoring *** temperature constant B for this DT,measured from 30 to 300°c(B30/300),achieves an exceptional value of 8012 K,which notably exceeds the temperature sensing capabilities of previously reported nTc thermistors within this extensive ***,diamond’s unique thermal conductivity and stability significantly boost the response speed and durability of the DT,offering substantial advantages over traditional ceramic *** enhanced temperature-sensitive properties of the DT are attributed to the presence of impurity elements in polycrystalline *** analysis indicates a hopping conduction mechanism,likely involving c-H or c-n dipoles at the diamond grain *** study marks a significant leap forward in diamond thermistor technology and sheds light on the mechanisms of thermal active conduction in diamond materials.

关键词： polycrystalline diamond thermistors negative temperature coefficient hopping conduction grain boundary

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Modulating p-type doping of two-dimensional material palladium diselenide

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nano Research 2024年第4期17卷 3232-3244页

作者： Jiali Yang Yu Liu En-Yang Wang Jinbo pang Shirong Huang Thomas Gemming Jinshun Bi Alicja Bachmatiuk Hao Jia Shu-Xian Hu chongyun Jiang Hong Liu Gianaurelio cuniberti Weijia Zhou Mark H Rümmeli Institute for Advanced Interdisciplinary Research(iAIR) University of JinanJinan 250022China Institute for Materials chemistry Leibniz Institute for Solid State and Materials Research Dresden(IFW Dresden)20 Helmholtz StrasseDresden 01069Germany state key lab.of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China college of Energy Soochow Institute for Energy and Materials Innovations Soochow UniversitySuzhou 215006China key lab.ratory of Advanced carbon Materials and Wearable Energy Technologies of Jiangsu province Soochow UniversitySuzhou 215006China School of Integrated circuits University of Chinese Academy of SciencesBeijing 101408China Institute of Microelectronics of Tianjin Binhai new Area Tianjin 300451China Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China Lukasiewicz Research network PORT Polish Center for Technology DevelopmentStablowicka 147Wroclaw 54-066Poland School of Mathematics and physics University of Science and Technology BeijingBeijing 100083China college of electronic information and optical engineering Nankai UniversityTianjin 300350China centre of polymer and carbon Materials Polish Academy of SciencesM.Curie Sklodowskiej 34Zabrze 41-819Poland center for Energy and Environmental Technologies VŠB-Technical University of Ostrava17.Listopadu 15Ostrava 70833Czech Republic state key lab.ratory of crystal Materials Center of Bio&Micro/Nano Functional MaterialsShandong UniversityJinan 250100China Dresden center for computational Materials Science Technische Universität DresdenDresden 01062Germany Dresden center for Intelligent Materials(GcL DcIM) Technische Universität DresdenDresden 01062Germany Institute for Materials Science and Max Bergmann center of biomaterials Technische Universität DresdenDresden 01069Germany center for Advancing Electronics Dresden Technische Universität DresdenDresden 01069Germany

The van der Waals heterostructures have evolved as novel materials for complementing the Si-based semiconductor ***-10 noble metal dichalcogenides(e.g.,ptS_(2),ptSe_(2),pdS_(2),and pdSe_(2))have been listed into two-dimensional(2D)materials toolkit to assemble van der Waals *** them,pdSe_(2) demonstrates advantages of high stability in air,high mobility,and wide tunable ***,the regulation of p-type doping of pdSe_(2) remains unsolved problem prior to fabricating p–n junction as a fundamental platform of semiconductor ***,a quantitative method for the controllab.e doping of pdSe_(2) is yet to be *** this study,the doping level of pdSe_(2) was correlated with the concentration of Lewis acids,for example,Sncl_(4),used for *** the transfer characteristics,the threshold voltage(the gate voltage corresponding to the minimum drain current)increased after Sncl_(4) soaking ***_(2) transistors were soaked in Sncl_(4) solutions with five different *** threshold voltages from the as-obtained transfer curves were extracted for linear fitting to the threshold voltage versus doping concentration correlation *** study provides in-depth insights into the controllab.e p-type doping of pdSe_(2).It may also push forward the research of the regulation of conductivity behaviors of 2D materials.

关键词： two-dimensional(2D)materials Lewis acid treatment p-type doping field-effect transistors transfer characteristic

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Fusion of a rice endogenous n-methylpurine DnA glycosylase to a plant adenine base transition editor ABE8e enables A-toK base editing in rice plants

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abioTEcH 2024年第2期5卷 127-139页

作者： Yucai Li Shaoya Li chenfei Li chen Zhang Lei Yan Jingying Li Yubing He Yan Guo Lanqin Xia Institute of crop Sciences(IcS) Chinese Academy of Agricultural Sciences(CAAS)Beijing 100081China state key lab.ratory of plant physiology and biochemistry College of Biological SciencesChina Agricultural UniversityBeijing 100193China Hainan Yazhou Bay Seed lab.ratory/national nanfan Research Institute(Sanya) CAASSanya 572024China

Engineering of a new type of plant base editor for simultaneous adenine transition and transversion within the editing window will greatly expand the scope and potential of base editing in directed evolution and crop ***,we isolated a rice endogenous hypoxanthine excision protein,n-methylpurine DnA glycosylase(OsMpG),and engineered two plant A-to-K(K=G or T)base editors,rAKBE01 and rAKBE02,for simultaneous adenine transition and transversion base editing in rice by fusing OsMpG or its mutant mOsMpG to a plant adenine transition base editor,*** further coupled either OsMpG or mOsMpG with a transactivation factor Vp64 to generate rAKBE03 and rAKBE04,*** these four rAKBEs,at five endogenous loci in rice protoplasts,indicated that rAKBE03 and rAKBE04 enabled higher levels of A-to-G base transitions when compared to ABE8e and ***,whereas rAKBE01 only enabled A-to-c/T editing at one endogenous locus,in comparison with rAKBE02 and rAKBE03,rAKBE04 could significantly improve the A-to-c/T base transversion efficiencies by up to 6.57-and 1.75-fold in the rice protoplasts,***,although no stable lines with A-to-c transversion were induced by rAKBE01 and rAKBE04,rAKBE04 could enable simultaneous A-to-G and A-to-T transition and transversion base editing,at all the five target loci,with the efficiencies of A-to-G transition and A-to-T transversion editing ranging from 70.97 to 92.31%and 1.67 to 4.84%in rice stable lines,***,these rAKBEs enable different portfolios of editing products and,thus,now expands the potential of base editing in diverse application scenario for crop improvement.

关键词： Rice(Oryza sativa L) Rice n-methylpurine DnA glycosylase(OsMpG) A-to-K base editor(AKBE) Transactivation module Vp64

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A general and facile calcination method to synthesize single-site catalysts for highly efficient electrochemical cO_(2) reduction

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nano Research 2024年第5期17卷 3895-3901页

作者： Rui Sui Bingyan Wang Yongsheng Wang Jiajing pei Wei Zhu Wenxing chen chunhui Li Ailing Sun Zhongbin Zhuang Engineering Research center of Advanced Rare Earth Materials Department of ChemistryTsinghua UniversityBeijing 100084China college of chemistry and Green catalysis center Zhengzhou UniversityZhengzhou 450001China state key lab.of organ.c-Inorgan.c composites and Beijing Advanced Innovation center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Energy&catalysis center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

The electrochemical cO_(2) reduction reaction(cO_(2)RR)has received widespread attention as a promising method for producing sustainable chemicals and mitigating the global ***,we demonstrate a general and facile synthetic route for the metal-nitrogen-carbon(M-n-c)type catalyst by simply calcinating metal acetate and urea with commercial carbon black,which have potential application in cO_(2)*** synthesized ni-nc-600 catalyst has the structure of single ni atom coordinated with one n atom and three c atoms(ni-n_(1)c_(3)),which is suggested by X-ray absorption *** ni-nc-600 catalyst exhibits high cO_(2)RR catalytic performance and a high cO Faraday efficiency above 98%in a wide potential range from-0.7 to-1.3 V(*** hydrogen electrode(RHE)),superior to most of the reported ni-n-c *** work has developed a facile strategy to synthesize high performance cO_(2)RR catalyst.

关键词： nickel single atom catalyst cO_(2)reduction reaction cO production electrocatalyst

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phase change Microcage for Multienergy capture and Microwave Absorption

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Renewables 2024年第3期2卷 183-193页

作者： Yang Li Zijian Liao panpan Liu Yu Jiang Xiao chen Guanglei Wu Ge Wang School of physics and Astronomy Beijing Normal UniversityBeijing 100875 Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen 518055 Institute of Materials for Energy and Environment State Key Laboratory of Bio-fibers and Eco-textilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071 Beijing Advanced Innovation center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083

Advanced multifunctional composite phase change materials(pcMs)integrating dual-field excitative thermal storage and microwave absorption have been recently highlighted in cutting-edge ***,we designed a metal–organ.c framework(MOF)derived magnetic nico-modified open carbon microcage(nico@c)for the encapsulation of pcMs,which simultaneously achieve fast-response multienergy capture and bimode stealth functions:The nico@c/pW composite pcMs exhibited a relatively high phase change enthalpy of 130.39 J/g due to the high cavity volume of the nico@c ***,the composite pcMs demonstrated excellent solar-thermal conversion,attributed to the local surface plasmon resonance effect of nico nanoparticles and full-spectrum absorption of high graphitized carbon ***,composite pcMs harvested high-efficiency magnetic-thermal conversion due to the néel and Brownian relaxation effects of diffusely embedded magnetic nico *** importantly,this thermal energy storage system achieved high-performance microwave absorption with a minimum reflection loss(RL)of−38.1 dB at 11.8 GHz at only 2.35 mm *** designed all-in-one strategy created an innovative platform for constructing advanced multifunctional microwave-absorbing composite pcMs with thermal storage,dual-energy conversion,microwave absorption,and infrared stealth.

关键词： phase change materials open microcage multienergy capture thermal energy storage microwave absorption

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Microstructure and phase Behavior of cationic Gemini/Anionic polyelectrolyte/Water Ternary System

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过程工程学报 2006年第2期6卷 296-301页

作者：皮瑛瑛尚亚卓彭昌军刘洪来 Dept. chemistry and state key lab. chem. Eng. East China Univ. Sci. & Technol.

The microstructure of cationic gemini surfactant 1,6-bis(dodecyldimethylammonium) hexane dibromide c12H25(cH3)2n(cH2)6n(cH3)2c12H252Br (126122Br) and oppositely charged polyelectrolyte poly(acrylic acid, sodium salt) (napA) in aqueous solution has been studied by using fluorescence, conductivity measurement, freeze-etching and TEM. The data obtained from fluorescence and conductivity measurement show that micelle-like or complex can form between the gemini surfactant (126122Br) and polyelectrolyte napA due to the static electric interaction and hydrophobic forces. Through freeze-etching and TEM, the microstructure of the mixture solution has been studied, which is consistent with the result from micropolarity. comparing the fluorescence spectrum of system of dodecyltrimethylammonium bromide (DTAB) and napA with that of system of gemini surfactant (126122Br) and napA, it can be found that the interaction between gemini surfactant (126122Br) and napA is stronger than that between DTAB and napA. And the phase behavior of (126122Br) and napA in aqueous solution has also been detected. It can be shown that the precipitate will transform into gel in higher napA concentration.

关键词：表面活性剂高分子电解质分子交互作用微胶粒显微结构

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Synthesis, Structure and non-linear Optical properties of Iron Mercury Tetrathiocyanate

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chinese chemical Letters 1998年第12期9卷 0-0,0-0页

作者： Yun Xing YAn Qi FAnG Wen Tao YU Yu peng TIAn Duo Rong YUAn Xin Qiang WAnG Fan Qing MEnG (Institute of crystal Materials and state key lab.ratory of crystal Materials,Shandong University, Jinan, 250100)Zhi Gang cAI Ling Zhi ZHAnG (Institute of Laser Institute of crystal Materials State Key Lab. of Crystal Materials Shandong University Jinan 250100 China Institute of Laser Spectroscopy Stake Key Lab. Ultrafast Laser S. Zhongshan University Guangzhou 510275 China

Iron Mercury Tetrathiocyanate (FeHg(Scn)4) has been synthesized and its structure hasbeen detendned. It belongs to the tetragonal system, 14 space group. The Hg-S-c=n-Fe bridgeleeds to the formation of an infinite three dimensional network. Irrsdiated by a 1.064 nm nd:YAG laser beam, FeHg(Scn)4 showed a 0.532 nm second harmonic intensity which is 0.6 times asthat of organ.c nonlinear optical crystal urea.

关键词： FeHg(Scn)_4 synthesis structure nonlinear property

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STRUcTURE AnD MAGnETIc pROpERTIES OF YFe_(12-x)Ti_x cOMpOUnDS

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Acta Metallurgica Sinica(English Letters) 2001年第3期14卷 171-176页

作者： B. Fuquan, J.L. Wang, n. Tang, W.Q. Wang, Z.Z. Guo, G.H. Wu and F.M. Yang (state key lab.ratory of Magnetism, Institute of physics, The chinese Academy of Sciences, Beijing 100080, china) (Department of physics, Inner Mongolia normal University, Huhhot 01 state key lab. of Magnetism Inst. of Phys. Chinese Acad. of Sci. Beijing 100080 China

The structure and magnetic properties of the YFe12-xTix compounds (x=0.85, 1.00, 1.10, 1.20 and 1.30) have been investigated. Both the thermomagnetic analysis and X-ray diffraction patterns show that all compounds studied are almost single phase and crystallize in the ThMn12-type structure. The lattice parameters a, c and unit cell volume V increase monotonously with the increase of Ti content. curie temperature Tc is almost independent on the Ti content while the spontaneous magnetization M0, the anisotropy field Ba and the anisotropy constant K1 decrease monotonously with the increase of Ti content and the temperature increases from 1.5 K to 293 K.

关键词： Iron Magnetic properties Structure (composition) Titanium Yttrium

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Syntheses and crystal Structures of Two new organ.cally Templated Borates:[(c_2H_(10)n_2)]2[B_(14)O_(20)(OH)_6] and [c_8H_(22)n_4][B_5O_6(OH)_4]_2

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chinese Journal of Structural chemistry 2009年第6期28卷 723-729页

作者：江晓刘欢欣吴淑莉梁云霄 state key lab. Base of novel Functional Materials and preparation Science Faculty of Materials Science and chemical Engineering Ningbo University

Two new nonmetal borates, [（c2H10n2）]2[B14O20（OH）6] 1 and [c8H22n4][B5O6（OH）4]2 2, have been synthesized under mild conditions and characterized by single-crystal X-ray diffraction, FTIR, elemental analysis and thermogravimetric analysis. crystal data for compound 1： triclinic, space group p^-1, a = 8.4979（17）, b = 8.8498（18）, c = 10.065（2）A^°, α = 95.01（3）, β = 96.99（3）, γ = 116.82（3）°, V= 661.8（3）A^°^3, Z= 1, Mr = 697.63, Dc = 1.751 g/cm^3,μ = 0.163 mm^-1, F（000） = 356, the final R = 0.0372 and wR = 0.0968 （I 〉 2σ（I））; and those for compound 2： monoclinic, space group p21/c, a = 9.1867（18）, b= 14.118（3）, c = 10.334（2）A^°, β = 91.48（3）°, V = 1339.8（5）A^°^3, Z = 2, Mr = 610.46, Dc = 1.513 g/cm^3,μ = 0.135 mm^-1, F（000） = 632, the final R = 0.0350 and wR = 0.0912 （I 〉 2σ（I））. For both 1 and 2, the anionic units are interlinked via O-H…O hydrogen bonds to form a 3D supramolecular network, while the protonated cations are located in the free space of the inorgan.c borate framework and interact with the anions by electrostatic attraction and extensive n-H…O hydrogen bonds.

关键词： borate crystal structure templated synthesis

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Edge effect during microwave plasma chemical vapor deposition diamond-film:Multiphysics simulation and experimental verification

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International Journal of Minerals,Metallurgy and Materials 2024年第10期31卷 2287-2299页

作者： Zhiliang Yang Kang An Yuchen Liu Zhijian Guo Siwu Shao Jinlong Liu Junjun Wei Liangxian chen Lishu Wu chengming Li Institute of Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144China Shunde Innovation School University of Science and Technology BeijingFoshan 528399China national key lab.ratory of Solid-state Microwave Devices and circuits The 55th Research Institute of China Electronics Technology Group CorporationNanjing 210016China

This study focused on the investigation of the edge effect of diamond films deposited by microwave plasma chemical vapor *** bulge height△h is a factor that affects the edge effect,and it was used to simulate plasma and guide the diamond-film deposition ***-element software cOMSOL Multiphysics was used to construct a multiphysics(electromagnetic,plasma,and fluid heat transfer fields)coupling model based on electron collision *** spectroscopy and scanning electron microscopy were performed to characterize the experimental growth and validate the *** simulation results reflected the experimental trends *** discharge at the edge of the substrate accelerated due to the increase in△h(△h=0-3 mm),and the values of electron density(n_(c)),molar concentration of H(c_(H)),and molar concentration of cH_(3)(c_(cH_(3)))doubled at the edge(for the special concave sample with△h=−1 mm,the active chemical groups exhibited a decreased molar concentration at the edge of the substrate).At=0-3 mm,a high diamond growth rate and a large diamond grain size were observed at the edge of the substrate,and their values increased *** uniformity of film thickness decreased *** Raman spectra of all samples revealed the first-order characteristic peak of dia-mond near 1332 cm^(−1).When△h=−1 mm,tensile stress occurred in all regions of the ***△h=1-3 mm,all areas in the film ex-hibited compressive stress.

关键词： microwave plasma chemical vapor deposition edge discharge plasma diamond film

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