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Proceedings Paper

Micro manipulation of superparamagnetic particles using magneto-optic tweezers
Author(s): Igor Poberaj; Dusan Babic; Natan Osterman; Jurij Kotar; Mojca Vilfan; Blaz Kavcic
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Paper Abstract

We have developed a magneto-optic tweezers that offer new experimental possibilities when laser tweezers were traditionaly used. The magneto-optic tweezers combine a multi-trap optical tweezers based on acousto optic deflectors and homogeneous magnetic field which direction and magnitude can be time modulated in arbitrary fashion. Superparamagnetic beads that are readily available from several commercial sources are used as trap handles. They can be manipulated using optical tweezers in a well known way. By applying magnetic field additional repulsive or attractive interaction between the particles can be induced, giving rise to new micromanipulation possibilities. Several examples of how magneto-optic traps can be used in colloidal physics reasearch and potential applications in biophysics and microfluidic systems are presented.

Paper Details

Date Published: 29 August 2008
PDF: 11 pages
Proc. SPIE 7038, Optical Trapping and Optical Micromanipulation V, 70381W (29 August 2008); doi: 10.1117/12.798026
Show Author Affiliations
Igor Poberaj, Univ. of Ljubljani (Slovenia)
Dusan Babic, Univ. of Ljubljani (Slovenia)
Natan Osterman, Univ. of Ljubljani (Slovenia)
Jurij Kotar, Univ. of Ljubljani (Slovenia)
Univ. of Cambridge (United Kingdom)
Mojca Vilfan, J. Stefan Institute (Slovenia)
Blaz Kavcic, Univ. of Ljubljani (Slovenia)

Published in SPIE Proceedings Vol. 7038:
Optical Trapping and Optical Micromanipulation V
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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