Article
Chemistry, Multidisciplinary
Eleni Kouni, Pantelis Moschopoulos, Yannis Dimakopoulos, John Tsamopoulos
Summary: When a charged particle moves through a solution, the surrounding electric double layer deforms in response to fluid motion, creating an electric force opposite to the particle's direction of motion, which reduces its settling velocity. This phenomenon combines fluid mechanics and electrodynamics, and differs from the classical problem of an uncharged sedimenting particle. Its applications range from mechanical to biomedical fields.
Article
Biochemical Research Methods
Hiroyuki Ohshima
Summary: The diffusiophoretic mobility of charged spherical colloidal particles in a symmetrical electrolyte solution has been studied, and an analytic expression has been obtained. The expression is correct to the third order of the particle zeta potential and is applicable for colloidal particles with low and moderate zeta potentials.
Article
Mechanics
Yvonne Wu, Elaine Jian, Leia Fan, Jessica Tseng, Renee Wan, Eric Lee
Summary: This study investigates diffusiophoresis of dielectric fluid droplets in a symmetric binary electrolyte solution, focusing on the chemiphoresis component. It found reversions of moving directions for droplets with increased electrolyte strength and an upward spouting effect on the droplet surface. The study suggests that diffusion-induced double layer polarization is the fundamental cause of droplet motion.
Article
Engineering, Chemical
Cihan Ates, Joel Arweiler, Habeb Hadad, Rainer Koch, Hans-Joerg Bauer
Summary: The objective of this study is to investigate the effect of secondary motion of particles in multiphase gas-solid flows and determine the relative impacts of particle shape and orientation information on particle distribution. The study finds that the shape and orientation information strongly affect the force balance for single particles, and the particle distribution in the chamber is significantly changed by the secondary motion of particles. The study also highlights the importance of particle orientation statistics in capturing the particle mixing and segregation patterns at dilute regime.
Article
Mechanics
Susmita Samanta, Paramita Mahapatra, H. Ohshima, Partha P. P. Gopmandal
Summary: The article focuses on the diffusion electric mobility of hydrophobic rigid colloids with arbitrary f-potential. A generic expression for the diffusion electric mobility of such colloids in an externally applied concentration gradient of a general electrolyte solution is derived, taking into account the relaxation effect. Closed-form expressions are derived for particle velocity under various electrostatic and hydrodynamic conditions, including symmetrical, asymmetrical, and mixed electrolyte solutions. The results illustrate the interaction between chemiphoresis, induced electrophoresis, and the migration of sufficiently charged particles in the opposite direction of the applied concentration gradient. The impact of hydrophobicity is also discussed. Published under an exclusive license by AIP Publishing. https://doi.org/10.1063/5.0141490
Article
Chemistry, Multidisciplinary
Wei Si, Xiaojing Lin, Liwei Wang, Gensheng Wu, Yin Zhang, Yunfei Chen, Jingjie Sha
Summary: This study theoretically reports a DNA-tracked nanovehicle that can move on a solid-state surface using molecular dynamics simulations. The nanovehicle is assembled with a graphene membrane as the chassis and circular ssDNAs as the wheels. By inducing electroosmotic flows through independently charged nanopores, controlled rotary motion is achieved, allowing the nanovehicle to move linearly and make turns. This design enables access to almost anywhere in the human body, leading to breakthroughs in nanoscale surgery and drug delivery. It enriches the nanorobot family and provides a new approach for nanovehicle design.
Article
Mathematics, Interdisciplinary Applications
Ehsan Motamedi, Behrooz Rahmani, Amin Moosaie
Summary: This paper investigates the manipulation of charged particles suspended in fluid flow within a plane channel. Linear-state feedback control methodology is employed to determine the external electric field. The governing mathematical equations are derived by combining Newton's second law, Coulomb's law, and Navier-Stokes equations. Simulation studies demonstrate the efficiency of the implemented control strategy in controlling particle position and tracking desired trajectories. These findings have significant contributions to the development of relevant industrial processes.
COMPUTATIONAL PARTICLE MECHANICS
(2023)
Article
Physics, Fluids & Plasmas
Jasleen Kaur, Aritra Ghosh, Malay Bandyopadhyay
Summary: This paper formulates and studies the quantum counterpart of the energy equipartition theorem for a charged quantum particle moving in a harmonic potential in the presence of an external magnetic field and linearly coupled to a passive quantum heat bath. Closed form expressions for the mean kinetic and potential energies of the charged dissipative magneto-oscillator are derived, exploring the relationship with the fluctuation-dissipation theorem. The influence of the external magnetic field and different dissipation processes on the properties of the system are investigated, along with the analysis of the system-bath coupling strength and memory effect on the average kinetic and potential energies.
Article
Computer Science, Artificial Intelligence
Alessandro Benfenati, Francesco Bonacci, Tarik Bourouina, Hugues Talbot
Summary: The paper introduces a method to estimate the 3D coordinates of spherical particles' centers by processing scanned volume images and utilizing Total Variation functional and regularized weighted Least Squares fit. Experiments show the significance of image denoising for particle tracking procedures.
JOURNAL OF MATHEMATICAL IMAGING AND VISION
(2021)
Article
Physics, Multidisciplinary
Vinesh Vijayan, Pranaya Pratik Das
Summary: This article provides a detailed numerical analysis of the dynamics of a charged Thomas oscillator in an external magnetic field and highlights the significance of this model in understanding the behavior of active particles.
Article
Physics, Multidisciplinary
Yahya N. Shaar, Joseph A. Rizcallah, Sergey P. Karnilovich
Summary: This study investigates the motion of a charged particle in a plane electromagnetic wave field propagating perpendicular to a crossed configuration of uniform electric and magnetic fields. The relativistic equations of motion are derived and integrated using a constant of motion in a special case. The obtained solutions are analyzed for various polarizations of the electromagnetic wave.
Article
Physics, Multidisciplinary
Esben Rohan Christensen, Arturo Camacho-Guardian, Georg M. Bruun
Summary: This study investigates a mobile ion immersed in a Bose-Einstein condensate, revealing the intricate interplay between few- and many-body physics due to the long-range nature of the ion-atom interaction. Various techniques are used to describe the rich physics and calculate the full spectral response of the ion. It is shown that the ion-atom interaction leads to the existence of polaronic and molecular states, with the spectral weight of molecules scaling with increasing powers of density.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
You-Sheng Yu, Qiang Ren, Rong-Ri Tan, Hong-Ming Ding
Summary: Using all-atom molecular dynamics simulation, we observe a non-monotonic relationship between the DNA capture rate and the amount of positive charge on the graphene nanopore.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
You-Sheng Yu, Qiang Ren, Rong-Ri Tan, Hong-Ming Ding
Summary: In this study, all-atom molecular dynamics simulations are used to investigate the capture of double-stranded DNA molecules into graphene nanopores with varying positive charges. It is found that there is a non-monotonic relationship between the DNA capture rate and the charge of the nanopore, shedding light on enhancing biomolecule capture rates in nanopore-based sensing platforms.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Mechanics
Jai Prakash, Huan J. Keh
Summary: This article discusses the steady translational motion of a slightly deformed spherical fluid drop suspended in an immiscible viscous fluid. The flow fields in both the interior and exterior of the drop are studied using the method of perturbed expansions under suitable boundary conditions. The effect of the deformation parameter on the hydrodynamic drag force exerted on the drop is observed, and explicit expressions for specific cases are obtained.
Article
Biochemical Research Methods
Sinan E. Yalcin, Ashutosh Sharma, Shizhi Qian, Sang W. Joo, Oktay Baysal
Article
Chemistry, Physical
Ye Ai, Sinan E. Yalcin, Diefeng Gu, Oktay Baysal, Helmut Baumgart, Shizhi Qian, Ali Beskok
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2010)
Article
Chemistry, Physical
Sang Yoon Lee, Sinan E. Yalcin, Sang W. Joo, Oktay Baysal, Shizhi Qian
JOURNAL OF PHYSICAL CHEMISTRY B
(2010)
Article
Engineering, Aerospace
Sang Yoon Lee, Sinan E. Yalcin, Sang W. Joo, Ashutosh Sharma, Oktay Baysal, Shizhi Qian
MICROGRAVITY SCIENCE AND TECHNOLOGY
(2010)