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Proceedings Paper

Size resolution with light-induced dielectrophoresis (LIDEP)
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Paper Abstract

We present a study into the small particle size and resolution limits of Light Induced Dielectrophoresis (LIDEP). Here the illumination of a photoconductive layer creates virtual electrodes whose associated electric field gradients cause the dielectrophoretic response of the particles. In this way a potential energy landscape can be created that is optically controlled giving reconfigurable control over a large area [1]. In this paper we discuss the interlinked limits of size of particle it is possible to manipulate and the resolution these particles can be manipulated with. We compare traditional dielectrophoresis (DEP) experiments with LIDEP experiments, and discuss the mechanisms behind the physical limits comparing the effects of carrier diffusion verses the spreading of the electric fields in the medium.

Paper Details

Date Published: 11 September 2006
PDF: 10 pages
Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 632618 (11 September 2006); doi: 10.1117/12.679440
Show Author Affiliations
Steven L. Neale, Univ. of St. Andrews (United Kingdom)
Michael Mazilu, Univ. of St. Andrews (United Kingdom)
Michael P. MacDonald, Univ. of St. Andrews (United Kingdom)
John I. B. Wilson, Heriot-Watt Univ. (United Kingdom)
Kishan Dholakia, Univ. of St. Andrews (United Kingdom)
Thomas F. Krauss, Univ. of St. Andrews (United Kingdom)

Published in SPIE Proceedings Vol. 6326:
Optical Trapping and Optical Micromanipulation III
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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