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Effect of ion dynamics on the Evolution of Electron Phase-space Holes

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空间科学学报 2013年第4期33卷 413-417页

作者： WANG Peiran LU Quanming WU Mingyu WANG Shui CAS Key Laboratory of Basic Plasma Physics Department of Geophysics and Planetary ScienceUniversity of Science and Technology of China

The evolution of two-dimensional（2D） electron phase-space holes（electron holes） has been previously investigated with electrostatic Particle-in-Cell（PIC） simulations,which neglect ion *** electron holes are found to be unstable to the transverse instability,and their evolution is determined by the combined action between the transverse instability and the stabilization by the background magnetic *** this paper,the effect of ion dynamics on the evolution of an electron hole is *** weakly magnetized plasma(Ωeion dynamics is considered. In strongly magnetized plasma(Ωe>ωpe),the electron hole is broken due to the lower hybrid waves, and its evolution is much faster.

关键词： ion dynamics Electron holes Transverse instability Magnetized plasma

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ion dynamics associated with Alfven wave in the near-Earth magnetotail:Two-dimensional global hybrid simulation

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Ion dynamics associated with Alfven wave in the near-Earth m...

Solvation Structure and dynamics of Mg(TFSI)_(2) Aqueous Electrolyte

中国科学院地质与地球物理研究所2008学术年会

作者： D.W.Swift Geophysical Institute University of AlaskaFairbanksAK 99775-7320USA

ion dynamics in the near-Earth magnetotail region is examined during periods of fast Earthward flow with a two-dimensional(2-D) global-scale hybrid *** simulation shows that shear Alfven waves are generated at x -10R,where the strong earthward flow is arrested by the dipole field,and propagate along field lines from the equator to both southern and northern polar ionosphere. Non-gyrotropic ion velocity distributions occur where the large-amplitude Alfven waves are *** simulation indicates that the Alfven waves are generated by interaction of the fast earthward flow with the stationary near-Earth *** ions are found to be pitch-angle scattered and trapped in the wave field,leading to the non-gyrotropic ion distributions in the high-latitude plasma sheet *** addition,significant particle heating and acceleration are found to occur behind the dipolarization front due to the effect of wave turbulence.

关键词： ion dynamics Alfven wave 2-D hybrid simulation Magnetotail

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Energy & Environmental Materials 2022年第1期5卷 295-304页

作者： Zhou Yu Taylor R.Juran Xinyi Liu Kee Sung Han Hui Wang Karl T.Mueller Lin Ma Kang Xu Tao Li Larry A.Curtiss Lei Cheng Materials Science Division Argonne National LaboratoryLemont IL 60439USA Joint Center for Energy Storage Research(JCESR) Lemont IL 60439USA Department of Physics Binghamton UniversityState University of New York4400 Vestal Parkway EastBinghamton NY 13902USA Department of Chemistry and Biochemistry Northern Illinois UniversityDeKalb IL 60115USA Physical and Computational Sciences Directorate Pacific Northwest National LaboratoryRichland WA 99352USA Energy&Environment Directorate Pacific Northwest National LaboratoryRichland WA 99352USA Energy Storage Branch Energy and Biotechnology DivisionSensor and Electronics DirectorateU.S.Army Research LaboratoryAdelphi MD 20783USA Department of Chemistry and Biochemistry Northern Illinois University DeKalb IL 60115 USA X-ray Science Division Argonne National Laboratory Lemont IL 60439 USA

Using ab initio molecular dynamics(AIMD)simulations,classical molecular dynamics(CMD)simulations,small-angle X-ray scattering(SAXS),and pulsed-field gradient nuclear magnetic resonance(PFG-NMR),the solvation structure and ion dynamics of magnesium bis(trifluoromethanesulfonyl)imide(Mg(TFSI)_(2))aqueous electrolyte at 1,2,and 3 m concentrations are *** AIMD and CMD simulations,the first solvation shell of an Mg;ion is found to be composed of six water molecules in an octahedral configuration and the solvation shell is rather *** TFSI^(-)ions prefer to stay in the second solvation shell and ***,the comparable diffusion coefficients of positive and negative ions in Mg(TFSI)_(2)aqueous electrolytes have been observed,which is mainly due to the formation of the stable[Mg(H_(2)O_(6))_(2)]^(+)complex,and,as a result,the increased effective Mg ion ***,the calculated correlated transference numbers are lower than the uncorrelated ones even at the low concentration of 2 and 3 m,suggesting the enhanced correlations between ions in the multivalent *** work provides a molecular-level understanding of how the solvation structure and multivalency of the ion affect the dynamics and transport properties of the multivalent electrolyte,providing insight for rational designs of electrolytes for improved ion transport properties.

关键词： Mg(TFSI)_(2)aqueous electrolyte molecular dynamics simulation pulsed-field gradient nuclear magnetic resonance small-angle X-ray scattering ion dynamics

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Transient Response and ionic dynamics in Organic Electrochemical Transistors

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Nano-Micro Letters 2024年第11期16卷 191-223页

作者： Chao Zhao Jintao Yang Wei Ma State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi′an 710049People’s Republic of China

The rapid development of organic electrochemical transistors(OECTs)has ushered in a new era in organic electronics,distinguishing itself through its application in a variety of domains,from high-speed logic circuits to sensitive biosensors,and neuromorphic devices like artificial synapses and organic electrochemical random-access *** recent strides in enhancing OECT performance,driven by the demand for superior transient response capabilities,a comprehensive understanding of the complex interplay between charge and ion transport,alongside electron–ion interactions,as well as the optimization strategies,remains *** review aims to bridge this gap by providing a systematic overview on the fundamental working principles of OECT transient responses,emphasizing advancements in device physics and optimization *** review the critical aspect of transient ion dynamics in both volatile and non-volatile applications,as well as the impact of materials,morphology,device structure strategies on optimizing transient *** paper not only offers a detailed overview of the current state of the art,but also identifies promising avenues for future research,aiming to drive future performance advancements in diversified applications.

关键词： Organic electrochemical transistors Transient response ion dynamics Electronic dynamics Volatility and non-volatility

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Bioinspired ionic control for energy and information flow

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International Journal of Smart and Nano Materials 2024年第1期15卷 198-221页

作者： Puguang Peng Han Qian Jiajin Liu Zhonglin Wang Di Wei Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijingChina School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijingChina School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGAUSA

The control of ion transport by responding to stimulus is a necessary condition for the existence of *** iontronics could enable anomalous ion dynamics in the nano-confined spaces,creating many efficient energy systems and neuromorphic in-sensor computing networks:Unlike tradi-tional electronics based on von Neumann computing architec-ture,the Boolean logic computing based on the iontronics could avoid complex wiring with higher energy efficiency and programmable neuromorphic ***,a systematic summary on the state of art in bioinspired iontronics is pre-sented and the stimulus from chemical potentials,electric fields,light,heat,piezo and magnetic fields on ion dynamics are *** and perspectives are also addressed in the aspects of iontronic integrated *** is believed that comprehensive investigations in bioinspired ionic control will accelerate the development on more efficient energy and information flow for the futuristic human-machine interface.

关键词： lontronics nanoconfined ion transport ion dynamics bioinspired iontronics ionic-electronic coupling interface

Storage dynamics of ions on graphene

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Interdisciplinary Materials 2024年第2期3卷 189-202页

作者： Minghao Guo Kun Ni Yanwu Zhu Key Laboratory of Precision and Intelligent Chemistry Department of Materials Science and EngineeringSchool of Chemistry and Materials ScienceHefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefeiAnhuiChina

Carbon has been widely utilized as electrode in electrochemical energy storage,relying on the interaction between ions and *** performance of a carbon electrode is determined by a variety of factors including the structural features of carbon material and the behavior of ions adsorbed on the carbon surface in the specific *** the fundamental unit of graphitic carbons,graphene has been employed as a model to understand the energy storage mechanism of carbon materials through various experimental and computational methods,ex‐situ or in‐*** this article,we provide a succinct overview of the state‐of‐the‐art proceedings on the ion storage mechanism on *** include the structure engineering of carbons,electric gating effect of ions,ion dynamics on the interface or in the confined space,and specifically lithium‐ion storage/reaction on *** aim is to facilitate the understanding of electrochemistry on carbon electrodes.

关键词： graphene ion dynamics ion storage ionic gating nano-confinement