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Title: Label-free alignment of nonmagnetic particles in a small uniform magnetic field
Authors: Wang, Zhaomeng
Wang, Ying
Wu, Rui Ge
Wang, Z. P
Ramanujan, Raju V
Keywords: DRNTU::Engineering::Materials
Magnetic Forces
Magnetic Particles
Issue Date: 2018
Source: Wang, Z., Wang, Y., Wu, R. G., Wang, Z. P., & Ramanujan, R. V. (2018). Label-free alignment of nonmagnetic particles in a small uniform magnetic field. Journal of Nanoscience and Nanotechnology, 18(1), 634-644. doi:10.1166/jnn.2018.14704
Series/Report no.: Journal of Nanoscience and Nanotechnology
Abstract: Label-free manipulation of biological entities can minimize damage, increase viability and improve efficiency of subsequent analysis. Understanding the mechanism of interaction between magnetic and nonmagnetic particles in an inverse ferrofluid can provide a mechanism of label-free manipulation of such entities in a uniform magnetic field. The magnetic force, induced by relative magnetic susceptibility difference between nonmagnetic particles and surrounding magnetic particles as well as particle–particle interaction were studied. Label-free alignment of nonmagnetic particles can be achieved by higher magnetic field strength (Ba ), smaller particle spacing (R), larger particle size (rp1 ), and higher relative magnetic permeability difference between particle and the surrounding fluid (Rμr ). Rμr can be used to predict the direction of the magnetic force between both magnetic and nonmagnetic particles. A sandwich structure, containing alternate layers of magnetic and nonmagnetic particle chains, was studied. This work can be used for manipulation of nonmagnetic particles in lab-on-a-chip applications.
ISSN: 1533-4880
DOI: 10.1166/jnn.2018.14704
Rights: © 2018 American Scientific Publishers. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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