Shape- and orientation-dependent diffusiophoresis of colloidal ellipsoids

Autor:	Viet Sang Doan, Dong-Ook Kim, Craig Snoeyink, Ying Sun, Sangwoo Shin
Rok vydání:	2023
Předmět:	Fluid Dynamics (physics.flu-dyn) Soft Condensed Matter (cond-mat.soft) FOS: Physical sciences Physics - Fluid Dynamics Condensed Matter - Soft Condensed Matter
Zdroj:	Physical Review E. 107
ISSN:	2470-0053 2470-0045
DOI:	10.1103/physreve.107.l052602
Popis:	We present the diffusiophoresis of ellipsoidal particles induced by ionic solute gradients. Contrary to the common expectation that diffusiophoresis is shape independent, here we show experimentally that this assumption breaks down when the thin Debye layer approximation is relaxed. By tracking the translation and rotation of various ellipsoids, we find that the phoretic mobility of ellipsoids is sensitive to the eccentricity and the orientation of the ellipsoid relative to the imposed solute gradient, and can further lead to nonmonotonic behavior under strong confinement. We show that such a shape- and orientation-dependent diffusiophoresis of colloidal ellipsoids can be easily captured by modifying theories for spheres.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e458dd0d99d8998320dc65b4dd4cf962 https://doi.org/10.1103/physreve.107.l052602 Zobrazit plný text záznamu