Near-field GHz rotation and sensing with an optically levitated nanodumbbell

P Ju, Y **, K Shen, Y Duan, Z Xu, X Gao, X Ni, T Li - Nano letters, 2023 - ACS Publications
A levitated nonspherical nanoparticle in a vacuum is ideal for studying quantum rotations
and is an ultrasensitive torque detector for probing fundamental particle–surface …

Active carpets drive non-equilibrium diffusion and enhanced molecular fluxes

F Guzmán-Lastra, H Löwen… - Nature Communications, 2021 - nature.com
Biological activity is often highly concentrated on surfaces, across the scales from molecular
motors and ciliary arrays to sessile and motile organisms. These 'active carpets' locally inject …

Dynamics in crowded environments: is non-Gaussian Brownian diffusion normal?

G Kwon, BJ Sung, A Yethiraj - The Journal of Physical Chemistry …, 2014 - ACS Publications
The dynamics of colloids and proteins in dense suspensions is of fundamental importance,
from a standpoint of understanding the biophysics of proteins in the cytoplasm and for the …

Long-lived anomalous thermal diffusion induced by elastic cell membranes on nearby particles

A Daddi-Moussa-Ider, A Guckenberger, S Gekle - Physical Review E, 2016 - APS
The physical approach of a small particle (virus, medical drug) to the cell membrane
represents the crucial first step before active internalization and is governed by thermal …

Rotational analysis of spherical, optically anisotropic janus particles by dynamic microscopy

A Wittmeier, A Leeth Holterhoff, J Johnson, JG Gibbs - Langmuir, 2015 - ACS Publications
We analyze the rotational dynamics of spherical colloidal Janus particles made from silica
(SiO2) with a hemispherical gold/palladium (Au/Pd) cap. Since the refractive index …

Rotational Taylor dispersion in linear flows

Z Peng - Journal of Fluid Mechanics, 2024 - cambridge.org
The coupling between advection and diffusion in position space can often lead to enhanced
mass transport compared with diffusion without flow. An important framework used to …

Hydrodynamic interaction between particles near elastic interfaces

A Daddi-Moussa-Ider, S Gekle - The Journal of Chemical Physics, 2016 - pubs.aip.org
We present an analytical calculation of the hydrodynamic interaction between two spherical
particles near an elastic interface such as a cell membrane. The theory predicts the …

Mobility of an axisymmetric particle near an elastic interface

A Daddi-Moussa-Ider, M Lisicki… - Journal of Fluid Mechanics, 2017 - cambridge.org
Using a fully analytical theory, we compute the leading-order corrections to the translational,
rotational and translation–rotation coupling mobilities of an arbitrary axisymmetric particle …

Brownian motion near an elastic cell membrane: A theoretical study

A Daddi-Moussa-Ider, S Gekle - The European Physical Journal E, 2018 - Springer
Elastic confinements are an important component of many biological systems and dictate the
transport properties of suspended particles under flow. In this paper, we review the …

Translational and rotational near-wall diffusion of spherical colloids studied by evanescent wave scattering

M Lisicki, B Cichocki, SA Rogers, JKG Dhont, PR Lang - Soft matter, 2014 - pubs.rsc.org
In this article we extend recent experimental developments [Rogers et al., Phys. Rev. Lett.,
2012, 109, 098305] by providing a suitable theoretical framework for the derivation of exact …