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Multidisciplinary and multiscale nanoscience research roadmap based on large scientific facilities

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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Coordination-driven structure reconstruction in polymer of intrinsic microporosity membranes for efficient propylene/propane separation

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The Innovation 2022年第6期3卷 137-144页

作者： Yanxiong Ren Boyang Chong Wei Xu Zhengqing Zhang Lin Liu Yingzhen Wu Yutao Liu Haifei Jiang Xu Liang Hong Wu Hongjun Zhang Bangjiao Ye Chongli Zhong Guangwei He Zhongyi Jiang Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515031China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Separation Membranes and Membrane Processes Tiangong UniversityTianjin 300387China

Polymers of intrinsic microporosity(PIMs),integrating unique microporous structure and solution-processability,are one class of the most promising membrane materials for energy-efficient gas ***,the micropores generated from inefficient chain packing often exhibit wide pore size distribution,making it very challenging to achieve efficient olefin/paraffin ***,we propose a coordination-driven reconstruction(CDR)strategy,where metal ions are incorporated into amidoxime-functionalized PIM-1(AO-PIM)to in situ generate coordination crosslinking *** varying the type and content of metal ions,the resulting crosslinking structures can be optimized,and the molecular sieving capability of PIM membranes can be dramatically ***,the introduction of alkali or alkaline earth metals renders more precise micropores contributing to superior C3H6/C3H8 separation performance.K+incorporated AO-PIM membranes exhibit a high ideal C3H6/C3H8 selectivity of 50,surpassing almost all the reported polymer ***,the coordination crosslinking structure significantly improves the membrane stability under higher pressure as well as the plasticization resistant *** envision that this straightforward and generic CDR strategy could potentially unlock the potentials of PIMs for olefin/paraffin separations and many other challenging gas separations.

关键词： separation porosity crosslinking

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Research on the Surface Flashover Characteristics of Ceramic with Irregular Base in Electron Guns

Research on the Surface Flashover Characteristics of Ceramic...

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IEEE International Conference on Plasma science (ICOPS)

作者： D. Zhang Z. Guo Z. Jia K. Cao B. Song G. Zhang National Key Laboratory of Particle Transport and Separation Technology Research Institute of Physics and Chemistry Engineering of Nuclear Industry Tianjin China Research Institute of Physics and Chemistry Engineering of Nuclear Industry Tianjin China State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical Engineering Xi’an Jiaotong University Xi’an Jiaotong University Xi’an China

ISBN: (数字)9798350360912

ISBN: (纸本)9798350360929

With the development of electronic guns towards high voltage, large capacity, and miniaturization, the surface flashover phenomenon of base ceramic insulators has become a key problem that leads to insulation damage, limits equipment performance, and reduces system reliability. In this paper, surface flashover experiments are conducted on special-shaped base ceramics with different materials and structures, and the phenomenon of surface flashover discharge is observed. Based on the theory of vacuum surface flashover discharge, this paper analyzes the influence of surface composition and microscopic parameters of different ceramic materials on surface flashover. It is found that the inner wall of ceramic insulators with this structure is more prone to flashover discharge by application of optical diagnostics, indicating that the weak point of insulation is the inner wall of the insulator. The flashover threshold of used insulators was slightly lower than that of new insulators, and the flashover voltage of alumina ceramic insulators was slightly higher than that of silicon nitride ceramics. In this paper, we also measured the secondary electron emission coefficient, charge trap parameters, and surface charge accumulation of two ceramic materials, thereby explaining the reasons for the differences in flashover thresholds. This work has important scientific and engineering significance for the safe and stable operation of electronic guns and the improvement of technical level.

关键词： Optical microscopy Surface discharges Silicon nitride Flashover Insulators Discharges (electric) Threshold voltage

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PIC simulation investigations on the effects of metallic vapor on vacuum surface flashover

PIC simulation investigations on the effects of metallic vap...

引用

IEEE International Conference on Plasma science (ICOPS)

作者： R. Lian D. Zhang Z. Guo Z. Jia B. Song G. Zhang Xi’an Jiaotong University State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical Engineering Xi’an Jiaotong University Xi’an China Research Institute of Physics and Chemistry Engineering of Nuclear Industry National Key Laboratory of Particle Transport and Separation Technology Tianjin China Research Institute of Physics and Chemistry Engineering of Nuclear Industry Tianjin China

ISBN: (数字)9798350360912

ISBN: (纸本)9798350360929

The vacuum-solid insulation system has been widely used in various types of electrical devices, playing a crucial role in insulation support, high-voltage isolation, and other important functions. However, the solidvacuum interface has been considered the weakest part of the insulation system. The breakdown voltage for surface flashover is typically much lower than that of both vacuum and solid dielectric materials, which seriously limits advancements in numerous fields, including pulsed-power devices, spacecraft, and other vacuum electrical equipment. Under normal operating conditions, insulators may become contaminated due to the melting or vaporization of electrodes and their migration from the surface of electrodes, resulting in a significant decrease in the flashover voltage. In this paper, the influences of metallic vapor on vacuum flashover are investigated with simulation. A particle-in-Cell (PIC) model is constructed based on the secondary electron emission avalanche (SEEA) theory. We use the space and velocity distribution of electrons, average surface charge density, and anode current to estimate the influences on surface flashover. It is found through simulations that the presence of metal vapor reduces the flashover threshold voltage. The wider the vapor and the closer it is to the anode, the more significant the decrease in the threshold voltage. This work provides effective references for the design of insulators.

关键词： Vacuum systems Surface contamination Vacuum breakdown Metals Flashover Insulators Solids

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Effects of Multiple Contaminant Components on Spectral Performance of Reflective Mirrors in Resonance Ionization Spectroscopy

Effects of Multiple Contaminant Components on Spectral Perfo...

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Pacific-Rim Laser Damage 2023: Optical Materials for High-Power Lasers

作者： Zhang, Yulin Wang, Yanzhi Jiang, Yugang Shao, Jianda Zhang, Zhizhong Laboratory of Thin Film Optics Shanghai Institute of Optics and Fine Mechanics No. 390 Qinghe Road Jiading District Shanghai201800 China National Key Laboratory of Particle Transport and Separation Technology No. 168 Jintang Road Hedong District Tianjin300171 China Tianjin Key Laboratory of Optical Thin Films Tianjin Jinhang Institute of Technical Physics No. 357 Baoshui Road Dongli District Tianjin300300 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China Key Laboratory of Materials for High Power Laser Shanghai Institute of Optics and Fine Mechanics No. 390 Qinghe Road Jiading District Shanghai201800 China

ISBN: (纸本)9781510672826

With the increasing scope of applications of laser, it is crucial to study the pollution of optical components for regulating beams in intricate environments. In resonance ionization spectroscopy instruments, the optics may suffer from contamination caused by both the analyzed sample and environmental impurities, which can cause detrimental effects on their optical properties, potentially leading to their degradation or destruction. The paper analyses the spectral performance of two categories of reflective mirrors that have been exposed to four kinds of contamination (Nd, Nd-oxide, Fe, and C) for comparison of reflectance degradation process variations. It is found that the impact of multiple contaminant components on the spectral performance of reflective mirrors is directly linked to their light transmission characteristics, with metal contamination in particular causing the most severe degradation. © 2023 SPIE.

关键词： Contamination

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High Temperature Oxidation Behavior of Plasma Surface Cr-Nb-Si Alloying System on Γ -Tial

SSRN

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SSRN 2022年

作者： Wei, Dongbo Hu, Yujin Lv, Xuming Li, Fengkun Yang, Kai Dang, Bo Pang, Xueqing Zhang, Pingze College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing211106 China Materials Preparation and Protection for Harsh Environment Key Laboratory Ministry of Industry and Information Technology Nanjing211106 China Science and Technology on Particle Transport and Separation Key National Defense Laboratory Research Institute of Physical and Chemical Engineering of Nuclear Industry Tianjin300180 China

The Cr-Nb-Si alloy system has attracted extensive attention of researchers due to its excellent oxidation resistance at high temperature. It is worth noting that the higher Cr content accelerates the transformation of the non-protective oxide Nb2O5 in the oxide scale, avoiding the occurrence of "pesting". And the increased mixing of CrNbO4 in the oxide is beneficial to improve the compactness of the oxide scale and inhibit the internal diffusion of O. The oxidation growth rate of the CrNbSi alloy system is only 1/16 of that of γ-TiAl at 800℃,100h. © 2022, The Authors. All rights reserved.

关键词： Niobium alloys

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Resonance ionization mass spectrometry of nickel odd-parity autoionization states

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Spectrochimica Acta Part B: Atomic Spectroscopy 2025年 231卷

作者： Zhang Jun-Yao Xiong Jing-Yi Zhou Hong-Ru Zhu Cai-Hua Sun Huai-Miao Wang Li-De Chai Jun-Jie Li Yun-Fei National Key Laboratory of Particle Transport and Separation Technology Tianjin 300180 China Research Institute of Physical and Chemical Engineering of Nuclear Industry Tianjin 300180 China Tianjin Key Laboratory of Stable Isotope Materials Technology Tianjin 300180 China

Efficient photoionization in isotope separation and laser ion source requires detailed characterization of autoionization states. This study presents a comprehensive investigation of nickel autoionization spectra via resonance ionization mass spectrometry (RIMS) to advance multi-color multi-step photoionization techniques. The three-color excitation scheme populates atoms into target high-lying excited states with the 3 d 8 4 s ( 4 F)5 s configuration in the 48,000–52,050 cm −1 range, followed by systematic autoionization scanning in the 64,600–68,700 cm −1 range. We identified 170 odd-parity autoionization states, including 150 previously unreported states. Spurious peaks arising from unintended transitions were eliminated through cross-validation of spectra from multiple scanning pathways and λ₂-blocked experiments. Precise characterization of energy positions, peak asymmetry and full width at half-maximum (FWHM) values was determined through Fano fitting. Remarkable consistency was observed for energy positions with literature data. Angular momenta ( J ) of 161 states were assigned using Δ J = 0, ±1 selection rules, with the majority exhibiting J = 4 or 5. These states are characterized by narrow FWHM (< 1 cm −1 ) and significant clustering in the target energy range. The strongest transitions were characterized for enhanced photoionization cross-sections in laser isotope separation. This research substantially expands the nickel autoionization spectral database.

关键词： Full width at half maximum

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Remaining Useful Life Prediction via Bayesian Temporal Convolutional Networks

Remaining Useful Life Prediction via Bayesian Temporal Convo...

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2021 International Conference on Advanced Computing and Endogenous Security, ICACES 2021

作者： Hong, Siyi He, Yihan Zhang, Jianpeng Jiang, Chao Deng, Yingjun College of Intelligence and Computing Tianjin University China School of Mathematics Tianjin University China National Digital Switching Systems EandT Research Center Zhengzhou China Science and Technology on Particle Transport and Seperation Laboratory Tianjin China Center for Applied Mathematics Tianjin University China

ISBN: (纸本)9781665424493

In modern industry, the accurate prediction of remaining useful life(RUL) contributes to the equipment safety and economic effectiveness. Aiming at the RUL prediction, this paper proposed a Bayesian temporal convolutional network (BayesianTCN) under the Bayesian deep learning framework. BayesianTCN outputs not only the RUL prediction, but also the associated confidence interval by Monte-Carlo simulation. This quantifies the RUL prediction uncertainty. Experimental results on CMAPSS datasets show that our model has higher fitting degree and lower uncertainty than BayesianLSTM, and performs well whether in simple or complex conditions. © 2022 IEEE.

关键词： Forecasting

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Research on No-Failure Data Evaluation Method Based on Imported Failure Information

Research on No-Failure Data Evaluation Method Based on Impor...

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2019 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering, QR2MSE 2019

作者： Qian, Yi Jiang, Chao Hebei University of Technology School of Mechanical Engineering Tianjin300401 China Science and Technology on Particle Transport and Separation Laboratory Tianjin300180 China

ISBN: (纸本)9781728114279

For the case of no-failure data under the weibull distribution, when the prior distribution is Beta distribution, the ranges of super-parameters a and b are determined by the characteristics of probability density function. After introducing failure information, the method of the multi-level bayes estimation is modified. The robustness and feasibility of the method are verified by comparing the error of failure probability and the reliability calculated. © 2019 IEEE.

关键词： Weibull distribution

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Remaining Useful Life Prediction via Bayesian Temporal Convolutional Networks

Remaining Useful Life Prediction via Bayesian Temporal Convo...

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Advanced Computing and Endogenous Security, International Conference on

作者： Siyi Hong Yihan He Jianpeng Zhang Chao Jiang Yingjun Deng College of Intelligence and Computing Tianjin University China School of Mathematics Tianjin University China National Digital Switching Systems E&T Research Center Zhengzhou China Science and Technology on Particle Transport and Seperation Laboratory Tianjin China Center for Applied Mathematics Tianjin University China

ISBN: (纸本)9781665424509

关键词： Uncertainty Monte Carlo methods Estimation Production Bayes methods Safety Security

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