Experimental investigation of electrostatic particle-particle interactions in optoelectronic tweezers

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This paper reports experimental and theoretical investigation of electrostatic attraction and repulsion of microparticles in an optoelectronic tweezers (OET). When we manipulate dielectric particles suspended in a fluid using OET, the electrostatic interactions of the polarized particles occur, limiting the effective manipulation of microparticles using a light-induced dielectrophoresis. In this study, we first demonstrate the electrostatic particle−particle interactions in the OET device using a liquid crystal display. At the same time, the experimental investigation of the dipole interactions between two spherical particles has been performed using the OET device. On the basis of the point-dipole model, simulation studies on the dipole forces acting on the particles and their trajectories by the forces are also performed. The experimental results show good agreement with the previously reported numerical studies as well as the results of our simulation studies.
Publisher
ACS
Issue Date
2008-07
Language
English
Citation

American Chemical Society Journal, pp.9903 - 9908

ISSN
1520-6106
URI
http://hdl.handle.net/10203/156398
Appears in Collection
NE-Conference Papers(학술회의논문)BiS-Conference Papers(학술회의논문)
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