1 January 2006 Evaluation of trapping efficiency of optical tweezers by dielectrophoresis
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J. of Biomedical Optics, 11(1), 014035 (2006). doi:10.1117/1.2165176
Abstract
A relatively new method for measuring optically induced forces on microparticles and cells, different from the conventional Brownian motion and viscous drag force calibration methods widely used, is introduced. It makes use of the phenomenon of dielectrophoresis for the calibration of optical tweezers through the dielectrophoretic force calculations. A pair of microelectrodes is fabricated by photolithography on a microscope slide and it is connected to a high-frequency generator. The calibration of the optical tweezers setup is performed by the manipulation of polystyrene beads and yeast cells. Calibration diagrams of the transverse forces versus power are deduced for different cell radii and numerical apertures of the objective lenses. The optical system and the related technique provide a fast and easy method for optical tweezers calibration.
Eirini I. Papagiakoumou, Dorel Pietreanu, Mersini I. Makropoulou-Loukogiannaki, Eugenia Kovacs, Alexander A. Serafetinides, "Evaluation of trapping efficiency of optical tweezers by dielectrophoresis," Journal of Biomedical Optics 11(1), 014035 (1 January 2006). http://dx.doi.org/10.1117/1.2165176
JOURNAL ARTICLE
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KEYWORDS
Particles

Dielectrophoresis

Optical tweezers

Electrodes

Objectives

Calibration

Microscopes

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