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29 August 2008 Micro manipulation of superparamagnetic particles using magneto-optic tweezers
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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.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Igor Poberaj, Dusan Babic, Natan Osterman, Jurij Kotar, Mojca Vilfan, and Blaz Kavcic "Micro manipulation of superparamagnetic particles using magneto-optic tweezers", Proc. SPIE 7038, Optical Trapping and Optical Micromanipulation V, 70381W (29 August 2008);

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