Mass transport improvement in microscale using diluted ferrofluid and a non-uniform magnetic field

This paper demonstrates that a non-uniform magnetic field and diluted ferrofluid can improve mass transport of non-magnetic solutes in a microfluidic device. A hydrodynamic flow-focusing configuration was employed to test this hypothesis. The system consists of a core stream and two sheath streams....

Full description

Saved in:
Bibliographic Details
Published in:RSC advances 2016-01, Vol.6 (67), p.62439-62444
Main Authors: Hejazian, Majid, Phan, Dinh-Tuan, Nguyen, Nam-Trung
Format: Article
Language:English
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:This paper demonstrates that a non-uniform magnetic field and diluted ferrofluid can improve mass transport of non-magnetic solutes in a microfluidic device. A hydrodynamic flow-focusing configuration was employed to test this hypothesis. The system consists of a core stream and two sheath streams. The core stream contains a diluted ferrofluid and a fluorescent dye. Without a magnetic field, both magnetic nanoparticles of the ferrofluid and the fluorescent dye in the core stream rely on molecular diffusion to spread transversally. The susceptibility mismatch between the core and focusing fluids results in a magnetoconvective secondary flow and subsequently the mass transport of the non-magnetic fluorescent dye. We observed a significant enhancement in mass transport of the fluorescent dye. The platform presented here could be used as a microfluidics-based gradient generator or micromixer. We investigate the mass transport enhancement of a non-magnetic fluorescent dye with the help of diluted ferrofluid and a non-uniform magnetic field.
ISSN:2046-2069
2046-2069
DOI:10.1039/c6ra11703a