A5013092944- Dust and Plasma Wave Phenomena
- Ionosphere and magnetosphere dynamics
- Cold Atom Physics and Bose-Einstein Condensates
- High-pressure geophysics and materials
- Crystallization and Solubility Studies
- Quantum, superfluid, helium dynamics
- X-ray Diffraction in Crystallography
- Magnetic confinement fusion research
- Earthquake Detection and Analysis
- Conducting polymers and applications
- Surfactants and Colloidal Systems
- Solar and Space Plasma Dynamics
- Material Dynamics and Properties
- Ionic liquids properties and applications
- Advanced Polymer Synthesis and Characterization
- Analytical Chemistry and Chromatography
- Luminescence and Fluorescent Materials
- Silicone and Siloxane Chemistry
- Quantum Electrodynamics and Casimir Effect
- Ferroelectric and Piezoelectric Materials
- Organic Electronics and Photovoltaics
- Acoustic Wave Resonator Technologies
- ZnO doping and properties
- Theoretical and Computational Physics
- Advanced Photocatalysis Techniques
Soochow University
2016-2025
Institute of Plasma Physics
2022-2025
Nanjing University
2001-2024
Arizona State University
2024
Czech Academy of Sciences, Institute of Plasma Physics
2024
Northeast Agricultural University
2019-2023
Princeton Plasma Physics Laboratory
2023
Chinese Academy of Sciences
2023
Los Alamos National Laboratory
2013-2021
Michigan State University
2021
The moment method is an image analysis technique for subpixel estimation of particle positions. total error in the calculated position includes effects pixel locking and random noise each pixel. Pixel locking, also known as peak artifact where positions are concentrated at certain locations relative to edges. We report simulations gain understanding sources their dependence on parameters experimenter can control. suggest algorithm, we find optimal use minimize locking. For a dusty plasma...
Surfactants based on imidazolium ionic liquids (ILs), including polymerizable surfactant ILs, have been synthesized and used to stabilize microemulsions useful for producing polymer nanoparticles, gels, open-cell porous materials.
A new type of proton-conducting hybrid membranes were prepared by in situ cross-linking a mixture polymerizable oils containing protic ionic liquids (PILs) and silica nanoparticles or mesoporous nanospheres. The resultant are semitransparent, flexible, show good thermal stability, tunable mechanical properties. Incorporation proper amount fillers significantly increased the proton conductivity membranes, probably due to ion transport channel network structures formed membranes. However,...
High-density data storage (HDDS) is urgently required to address ongoing rapid increases in amounts of information. Here we present a prototype sandwich device that has ternary data-storage performance. Three characteristic currents can be read out using certain constant voltage after removal the applied voltage. Two electron pull groups and one push group are identified as species responsible for flow. We believe our observation will offer an interesting useful theoretical approach huge...
Dusty plasmas are electrically quasi-neutral media that, along with electrons, ions, neutral gas, radiation, and electric and/or magnetic fields, also contain solid or liquid particles sizes ranging from a few nanometers to micrometers. These can be found in many natural environments as well various laboratory setups industrial applications. As separate branch of plasma physics, the field dusty physics was born beginning 1990s at intersection interests communities investigating astrophysical...
Velocity errors in particle tracking velocimetry (PTV) are studied. When using high-speed video cameras, the velocity error may increase at a high camera frame rate. This is due to particle-position uncertainty, which one of two sources studied here. The other source acceleration, has opposite trend diminishing higher rates. Both kinds can propagate into quantities calculated from velocity, such as kinetic temperature particles or correlation functions. As demonstrated dusty plasma...
Photoelectrochemical (PEC) cells based on silicon nanowire arrays (SiNWs) have, to date, exhibited modest power conversion efficiency (PCE) and suffered serious degradation, though they exhibit advantageous properties of charge-transfer/transport at the radial-junction strong light-trap capabilities. The main challenge for this low-cost PEC cell is surface photooxidation photocorrosion when contacting with electrolyte. In report, SiNWs derivatized covalently attached methyl groups, prepared...
The viscoelasticity of two-dimensional liquids is quantified in an experiment using a dusty plasma. An experimental method demonstrated for measuring the wave-number--dependent viscosity $\ensuremath{\eta}(k)$, which quantitative indicator viscoelasticity. Using expression generalized here to include friction, $\ensuremath{\eta}(k)$ computed from transverse current autocorrelation function, found by tracking random particle motion. function exhibits oscillation that signature elastic...
Profound temperature peaks are observed in regions of high velocity shear a 2D dusty plasma experiment with laser-driven flow. These attributed to viscous heating, which occurs due collisional scattering Using measurements viscosity, thermal conductivity, and spatial profiles flow temperature, we determine three dimensionless numbers: Brinkman, $\mathrm{Br}=0.5$; Prandtl, $\mathrm{Pr}=0.09$; Eckert, $\mathrm{Ec}=5.7$. The large value Br indicates significant heating that is consistent the peaks.
The naturally persistent flow of hundreds dust particles is experimentally achieved in a dusty plasma system with the asymmetric sawteeth gears on electrode. It also demonstrated that direction particle can be controlled by changing conditions gas pressure or power. Numerical simulations ion drag inside verify experimental observations rectification particles. Both experiments and suggest potential collective effect are two keys this ratchet. With nonequilibrium drag, along orientation...
Dusty plasmas represent a powerful platform to study the collective dynamics of strongly coupled systems with important interdisciplinary connections condensed matter physics. Due pure Yukawa repulsive interaction between dust particles, dusty do not display traditional liquid-vapor phase transition, perfectly matching definition supercritical fluid. Using molecular simulations, we verify nature and reveal existence dynamical liquidlike gaslike crossover which matches salient features...
Molecular dynamical simulations are performed to investigate the scaling of transverse sound speed in two-dimensional (2D) and 3D Yukawa fluids. From calculated diagnostics radial distribution function, mean-squared displacement, Pearson correlation coefficient, approximate isomorphic curves for 2D liquidlike systems obtained. It is found that structure dynamics exhibit property under conditions same relative coupling parameter Γ/Γ_{m}=const. demonstrated reduced speed, i.e., ratio thermal...
It is demonstrated experimentally that strongly coupled plasma exhibits solid superheating. A 2D suspension of microspheres in dusty plasma, initially self-organized a lattice, was heated and then cooled rapidly by turning laser heating on off. Particles were tracked using video microscopy, allowing atomistic-scale observation during melting solidification. During rapid heating, the remained structure at temperatures above point, demonstrating Hysteresis diagrams did not indicate liquid...
Poly(2-acrylamido-2-methylpropanesulfonic acid) (PAMPS) has been used for the preparation of proton exchange membranes (PEMs) due to superior ability sulfonic acid groups originated from AMPS in supporting conduction. Since PAMPS is water-swollen or even soluble water, it necessary copolymerize with proper monomer oils control swelling and mechanical properties membranes. However, as a water-soluble monomer, generally immiscible hydrophobic oils. To overcome this obstacle, was converted an...
The theoretical Green-Kubo relation for viscosity is tested using experimentally obtained data. In a dusty plasma experiment, micron-size dust particles are introduced into partially-ionized argon plasma, where they become negatively charged. They electrically levitated to form single-layer Wigner crystal, which subsequently melted laser heating. the liquid phase, these experience interparticle electric repulsion, heating, and friction from ambient neutral gas, can be considered in...
Taking advantage of the new opportunities provided by x-ray free electron laser (FEL) sources when coupled to a long pulse as available at Linear Coherent Light Source (LCLS), we have performed absorption near-edge spectroscopy (XANES) shock compressed iron up 420 GPa ($\ifmmode\pm\else\textpm\fi{}50$) and 10 800 K ($\ifmmode\pm\else\textpm\fi{}1390$). Visible diagnostics with hydrodynamic simulations were used infer thermodynamical conditions along Hugoniot release adiabat. A modification...
Stochastic transport of a two-dimensional (2D) dusty plasma liquid with perpendicular magnetic field is studied. Superdiffusion found to occur especially at higher fields $\ensuremath{\beta}$ order unity. Here, $\ensuremath{\beta}={\ensuremath{\omega}}_{c}/{\ensuremath{\omega}}_{pd}$ the ratio cyclotron and frequencies for dust particles. The mean-square displacement $\mathrm{MSD}=4{D}_{\ensuremath{\alpha}}{t}^{\ensuremath{\alpha}}$ have an exponent $\ensuremath{\alpha}>1$, indicating...
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication the EditorNEXTPolymerization of Ionic Liquid-Based Microemulsions: A Versatile Method for Synthesis Polymer ElectrolytesShaomei Yu†, Feng Yan*†‡, Xingwang Zhang§, Jingbi You§, Peiyi Wu‡, Jianmei Lu*†, Qingfeng Xu†, Xuewei Xia†, and Guilin Ma†View Author Information Key Laboratory Organic Jiangsu Province, School Chemistry Chemical Engineering, Suzhou University, 215123, P.R. China; Molecular Engineering Polymers, Fudan Lab...
The spatiotemporal development of melting is studied experimentally in a 2D dusty plasma suspension. Starting with an ordered lattice, and then suddenly applying localized shear, pair counter-propagating flow regions develop. A transition between two stages observed before steady state reached. Melting spreads front that propagates at the transverse sound speed. Unexpectedly, coherent longitudinal waves are excited region.
Particle random motion can exhibit both anomalous diffusion and non-Gaussian statistics in some physical systems. Anomalous is quantified by a deviation from $\ensuremath{\alpha}=1$ power law for particle's mean-square displacement, $\mathrm{MSD}\ensuremath{\propto}{(\ensuremath{\Delta}t)}^{\ensuremath{\alpha}}$. A Gaussian probability distribution function (PDF) fitting to $\ensuremath{\kappa}$ or Tsallis distribution, with fit parameter $q$. We report an experiment simulations test theory...