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Multidisciplinary and multiscale nanoscience research roadmap based on large scientific facilities

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science china chemistry 2024年第8期67卷 2497-2523页

作者： Yuan Zeng Shuhan Zhang Yuecong Guo Yalin Cong Xu Ding Peihua li Yunxiang lin Wenzhi Ren Hui Su Weigang Sun liuxin Xu Guikai Zhang Shihua Chen Yu Chen Weiren Cheng Shengqi chu Yong Guan Jinru Han Jie lin Hengjie liu Zheyi liu Pan Luo Fanchun Meng Sicong Qiao Zongyin Song Ying wang Zhao Wu Chenyu Yang Meng Yang Shirui Yang Zi Yin Zhibin Yin Pengjun Zhang Hongyu Zhang Pingping Zheng Jia Zhou Wanlin Zhou Pengfei An He Cheng chunhai Fan Xingjiu Huang Yong Lei lina li Mu li Qinghua liu Shuming Peng li Song Zhihu Sun Yangchao Tian Fangjun wang lihua wang liming wang Shiqiang Wei Aiguo Wu chunlei Xiao Xueming Yang Panchao Yin Jing Zhang Mingxin Zhang Yaling wang chunying Chen CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety New Cornerstone Science LaboratoryNational Center for Nanoscience and TechnologyBeijing 100190China university of Chinese Academy of sciences Beijing 100049China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China Institute of Solid State physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China Institutes of Physical science and Information technology Anhui UniversityHefei 230601China Ningbo Key Laboratory of Biomedical Imaging Probe materials and technology Zhejiang International Cooperation Base of Biomedical Materials Technology and ApplicationCAS Key Laboratory of Magnetic Materials and DevicesNingbo Cixi Institute of Biomedical EngineeringZhejiang Engineering Research Center for Biomedical MaterialsNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Advanced Energy science and technology Guangdong Laboratory Huizhou 516000China College of chemistry and Chemical Engineering Hunan Normal UniversityChangsha 410081China State Key Laboratory of Luminescent materials and Devices South China Advanced Institute for Soft Matter Science and TechnologySouth China University of TechnologyGuangzhou 510640China beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China CAS Key Laboratory of Separation sciences for Analytical chemistry Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Institute of Advanced science Facilities Shenzhen 518107China State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Acade

With the advancement of modern science and technology, large scientific facilities are increasingly oriented toward demand and application, and can be used for basic research as well as serving multiple disciplines. Developing large scientific facilities and related analytical technologies enhances understanding of large scientific facilities and popularizes their application in research across multiple disciplines. The combination of light or neutron sources from large scientific facilities and advanced analytical technologies can be achieved for materials structure information, dynamics study of chemical reactions, high dissociation of biomolecules, 3D visualization of energy materials or biological samples, etc. We first introduce the progress of domestic large scientific facilities of synchrotron radiation(SR) and free electron lasers(FELs) with different wavelengths and neutron *** further discuss the comparison between Chinese and typical foreign facilities in X-ray radiation from X-ray tubes, synchrotrons, X-ray FELs, and neutron sources based on physical parameters of light and neutron sources. In addition, we focus on the technological progress and perspectives combined with advanced X-ray radiation and neutron sources of large scientific facilities in china, especially in the nanoscience fields of energy catalysis and biological science. We hope that this roadmap will provide references on technology and methods to experimental users, as well as prospects for future development of technologies based on large research infrastructure facilities. Comprehensive studies and guidelines for basic research to practical application in various disciplines can be made with the assistance of large scientific facilities.

关键词： large scientific facilities synchrotron radiation FEL light sources neutron sources spectroscopic analysis methods X-ray imaging techniques structural information chemical dynamics

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Alloy strategy to synthesize Pt-early transition metal oxide interfacial catalysts

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Nano Research 2024年第4期17卷 3390-3397页

作者： Shi-Long Xu Hang Nan Wanqun Zhang Yue lin Sheng-Qi chu Hai-Wei liang Hefei National Research Center for Physical sciences at the Microscale Department of ChemistryUniversity of Science and Technology of ChinaHefei 230026China School of materials and Chemical Engineering Anhui Jianzhu UniversityHefei 230601China Institute of High Energy physics Chinese Academy of SciencesBeijing 100049China

Metal oxide supported metal catalysts show promising catalytic performance in many industry-relevant ***,the enhancement of performance is often limited by the insufficient metal/metal oxide *** this work,we demonstrate a general synthesis of Pt-early transition metal oxide(Pt-MO_(x),M=Ti,Zr,V,and Y)catalysts with rich interfacial sites,which is based on the air-induced surface segregation and oxidation of M in the supported Pt-M alloy *** characterizations verify the dynamic structural response of Pt-M alloy catalysts to air and the formation of Pt-MO_(x) catalysts with abundant interfacial *** prepared Pt-TiO_(x) interfacial catalysts exhibit improved performance in hydrogenation reactions of benzaldehyde,nitrobenzene,styrene,and furfural,as a result of the heterolytic dissociation of H_(2) at Pt-metal oxide interfacial sites.

关键词： Pt-early transition metal oxide interfacial catalyst alloy oxidation strategy interfacial sites hydrogenation reactions heterolytic dissociation

Three-dimensional molecular dynamics simulation of hydrogen-enhanced dislocation emission and crack propagation

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Progress in Natural science:materials International 2002年第9期 79-82页

作者： li Zhongji, chu wuyang, li Jinxu, GAO Kewei and QIAO lijie(Department of materials physics, university of science and technology beijing, beijing 100083, china) Department of materials physics University of Science and Technology Beijing Beijing 100083 China

A three-dimensional molecular dynamics simulation using the embedded atom method (EAM) potentials shows that for both pure Ni and Ni+ H, dislocations are firstly emitted during loading and the crack propagates after enough dislocations are emitted. In the case of hydrogen embrittlement, local plastic deformation is a precondition for crack propagation. For the crack along the (111) slip plane, one atom fraction in percent of hydrogen can decrease the critical stress intensity for dislocation emission KIe from 0. 42 to 0. 36 MPam1/2, and that for crack propagation KIp from 0. 80 to 0:76 MPam1/2. Therefore, hydrogen enhances dislocation emission and crack propagation.

关键词： molecular dynamics simulation hydrogen dislocation emission crack propagation nickel.

Effect of Oxygen Concentration and Annealing Theatment on the Optical Properties of the Transparent Conductive CdIn_2O_4 Thin Films

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Journal of materials science & technology 1998年第2期14卷 161-166页

作者： Bin WU Changyong CHEN and Shibin ZHANG(physics dept., Lanzhou university, Lanzhou 730000, china)Wanlu wang and Kejun liAO(Applied physics dept., Chongqing university, Chongqing 400044, china) physics dept. Lanzhou University Lanzhou 730000 China Applied physics dept. Chongqing University Chongqing 400044 China

Transparent conductive cadmium indium oxide films (CdIn2O4) were prepared by r.f. reactive sputtering from Cd-In alloy targets under an Ar-O2 atmosphere. Electrical conductivity of the order of 105Ω-1.m-1 and the optical transmission as high as 94% are easily attained by postdeposition annealing treatment. The effects of oxygen concentration in the reactive gas mixture and post-deposition annealing treatment on the optical transmittance as well as optical parameters, such as refractive index (n), extinction coefficient (k), real part (ε') and imaginary part (ε') of the dielectric constant, were studied in the visible and near-infrared region. The highfrequency dielectric constant ε∞ the plasma frequency ωP, and the conduction band effective mass mc of different samples were also investigated

关键词： Thin Effect of Oxygen Concentration and Annealing Theatment on the Optical Properties of the Transparent Conductive CdIn2O4 Thin Films

Conduction Properties and Scattering Mechanisms in F-doped Textured Transparent Conducting SnO_2 Films Deposited by APCVD

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Journal of materials science & technology 1997年第1期13卷 50-56页

作者： Deheng ZHANG(dept. of physics, Shandong university, Jinan 250100, china)Honglei MA(Institute of Optoelectronic materials and Devices, Shandong university, Jinan 250100, china) dept. of physics Shandong University Jinan 250100 China Institute of Optoelectronic materials and Devices Shandong University Jinan 250100 China

Transparent conducting F-doped texture SnO2 films with resistivity as low as 5× 10-4 Ω ·cm,with carrier concentrations between 3.5 × 1020 and 7× 1020 cm-3 and Hall mobilities from 15.7 to 20.1 cm2/(V/s) have been prepared by atmosphere pressure chemical vapour deposition (APCVD). These polycrystalline films possess a variable preferred orientation, the polycrystallite sizes and orientations vary with substrate temperature. The substrate temperature and fluorine flow rate dependence of conductivity, Hall mobility and carrier conentration fOr the resultingfilms have been obtained. The temperature dependence of the mobiity and carrier concentrationhave been measured over a temperature range 16～400 K. A systematically theoretical analysis on scattering mechanisms for the highly conductive SnO2 films has been given. Both theoretical analysis and experimental results indicate that for these degenerate, polycrystalline SnO2 ：F films in the low temperature range (below 100 K), ionized impurity scattering is main scattering mechanism. However, when the temperature is higher than 100 K, the lattice vibration scattering becomes dominant. The grain boundary scattering makes a small contribution to limit the mobility of the films.

关键词： SnO cm Conduction Properties and Scattering Mechanisms in F-doped Textured Transparent Conducting SnO2 Films Deposited by APCVD

Effect of Ti contents on interfacial bonding, mechanical and thermal properties of Mo-Cu composites

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Tungsten 2024年第3期6卷 549-554页

作者： Jian-Ru chu Xiao-Song Jiang Tian-Yan liu Key Laboratory of Advanced Technologies of materials Ministry of Education School of materials science and Engineering Southwest Jiaotong University Reactor Engineering Research Sub-Institute Nuclear Power Institute of China

Mo-Cu composites are widely used in electronic packaging, vacuum technology, microwave devices and other fields due to their excellent properties, such as excellent electrical and thermal conductivity, low adjustable ...

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Heterophase junction engineering-induced Co spin-state modulation of CoSe_(2) for large-current hydrogen evolution reaction

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Rare Metals 2024年第6期43卷 2660-2670页

作者： Bao-Chai Xu Ya-Ping Miao Min-Qin Mao Dong-lian li Song Xie Wei-Hong Jin Shu Xiao Jing Wen Zaenab Abd-Allah Zhi-Tian liu Xiang Peng Paul K.chu Hubei Key Laboratory of Plasma chemistry and Advanced materials School of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205China School of Textile science and Engineering Xi'an Polytechnic UniversityXi'an 710048China Institute of Advanced Wear and Corrosion Resistant and Functional materials Jinan UniversityGuangzhou 510632China Institute of Safety science and Engineering South China University of TechnologyGuangzhou 510641China Department of Engineering Manchester Metropolitan UniversityManchester M156BHUK Department of physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongHong Kong 999077China

Efficient electrocatalysts are vital to large-current hydrogen production in commercial water splitting for green energy ***,a novel heterophase engineering strategy is described to produce polymorphic CoSe_(2)*** composition of the electrocatalysts consisting of both cubic CoSe_(2)(c-CoSe_(2))and orthorhombic CoSe_(2)(o-CoSe_(2))phases can be controlled *** results demonstrate that junction-induced spin-state modulation of Co atoms enhances the adsorption of intermediates and accelerates charge transfer resulting in superior large-current hydrogen evolution reaction(HER)***,the CoSe_(2)based heterophase catalyst with the optimal c-CoSe_(2)content requires an overpotential of merely 240 mV to achieve 1,000 mA·cm^(-2)as well as a Tafel slope of 50.4 mV·dec^(-1).Furthermore,the electrocatalyst can maintain a large current density of 1,500 mA·cm^(-2)for over 320 h without *** results reveal the advantages and potential of heterophase junction engineering pertaining to design and fabrication of low-cost transition metal catalysts for large-current water splitting.

关键词： Heterophase junction Spin-state Hydrogen evolution reaction Large current electrochemical hydrogen production Water splitting

Free Volume Changes in γ-Irradiated Polyethylene and Polytetraflourethylene

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Journal of materials science & technology 2000年第3期16卷 302-304页

作者： Xianyi ZHOU (dept. of Modern physics, university of science and technology of china, Hefei 230027, china) linhua ZHAI (Department of physics, Anhui Normal university, Wuhu 241000, china) Jiangfeng DU and Rongdian HAN (Department of Modern physics, Univers Department of Modern physics University of Science and Technology of China Hefei 230027 China Department of physics Anhui Normal University Wuhu 241000 China

Positron lifetime spectrum was measured and the change of the free volume was studied for commercial polyethylene (PE) and polytetrafluoroethylene (PTFE) during 7-irradiation processing up to 265 kGy. The free volume size increases but the crystallinity decreases as irradiation dose increases in PE. Both qualities (free volume size and crystallinity) in PTFE display an opposite behavior. The fractional free volume reduces monotonically with increasing irradiation dose in both PE and PTFE. The competition between the crosslinkmg and the splitting decomposition in polymers can be used to understand the free volume changes with irradiation dose.

关键词： PTFE Irradiated Polyethylene and Polytetraflourethylene

Surface Metallization of Glass Fiber(GF)/Polyetheretherketone(PEEK) Composite with Cu Coatings Deposited by Magnetron Sputtering and Electroplating

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Journal of Wuhan university of technology(materials science) 2024年第1期39卷 213-220页

作者：钟利金凡亚朱剑豪 TONG Honghui DAN Min Southwest Institute of physics Chengdu 610000China City university of Hong Kong Tat Chee AvenueKowloonHong Kong 999077China

Surface metallization of glass fiber(GF)/polyetheretherketone(PEEK)[GF/PEEK] is conducted by coating copper using electroplating and magnetron sputtering and the properties are determined by X-ray diffraction(XRD), scanning electron microscopy(SEM), and electron backscatter diffraction(EBSD).The coating bonding strength is assessed by pull-out tests and scribing in accordance with GB/T *** results show that the Cu coating with a thickness of 30 μm deposited on GF/PEEK by magnetron sputtering has lower roughness, finer grain size, higher crystallinity, as well as better macroscopic compressive stress,bonding strength, and electrical conductivity than the Cu coating deposited by electroplating.

关键词： surface metallization Cu coating magnetron sputtering electroplating