3D monitoring of the surface slippage effect on micro-particle sedimentation by digital holographic microscopy

In several phenomena in biology and industry, it is required to understand the comprehensive behavior of sedimenting micro-particles in fluids. Here, we use the numerical refocusing feature of digital holographic microscopy (DHM) to investigate the slippage effect on micro-particle sedimentation nea...

Full description

Saved in:
Bibliographic Details
Published in:Scientific reports 2021-06, Vol.11 (1), p.12916-12916, Article 12916
Main Authors: Panahi, Majid, Jamali, Ramin, Rad, Vahideh Farzam, Khorasani, Mojtaba, Darudi, Ahamd, Moradi, Ali-Reza
Format: Article
Language:English
Subjects:
639/624/1107/510
639/624/1111/1117
Colloids
Humanities and Social Sciences
Hydrophobicity
Microscopy
multidisciplinary
Science
Science (multidisciplinary)
Sedimentation
Sedimentation & deposition
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In several phenomena in biology and industry, it is required to understand the comprehensive behavior of sedimenting micro-particles in fluids. Here, we use the numerical refocusing feature of digital holographic microscopy (DHM) to investigate the slippage effect on micro-particle sedimentation near a flat wall. DHM provides quantitative phase contrast and three-dimensional (3D) imaging in arbitrary time scales, which suggests it as an elegant approach to investigate various phenomena, including dynamic behavior of colloids. 3D information is obtained by post-processing of the recorded digital holograms. Through analysis of 3D trajectories and velocities of multiple sedimenting micro-particles, we show that proximity to flat walls of higher slip lengths causes faster sedimentation. The effect depends on the ratio of the particle size to (1) the slip length and (2) its distance to the wall. We corroborate our experimental findings by a theoretical model which considers both the proximity and the particle interaction to a wall of different hydrophobicity in the hydrodynamic forces.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-92498-0