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Optics Express

Optics Express

  • Vol. 17, Iss. 7 — Mar. 30, 2009
  • pp: 5231–5239

Trap profiles of projector based optoelectronic tweezers (OET) with HeLa cells

Steven L. Neale, Aaron T. Ohta, Hsan-Yin Hsu, Justin K. Valley, Arash Jamshidi, and Ming C. Wu  »View Author Affiliations


Optics Express, Vol. 17, Issue 7, pp. 5231-5239 (2009)
http://dx.doi.org/10.1364/OE.17.005231


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Abstract

In this paper we present trap profile measurements for HeLa cells in Optoelectronic Tweezers (OET) based on a data projector. The data projector is used as a light source to illuminate amorphous Si creating virtual electrodes which are used to trap particles through dielectrophoresis. We show that although the trap stiffness is typically greater at the edges of the optical spot it is possible to create a trap with constant trap stiffness by reducing the trap’s size until it is similar to the object being trapped. We have successfully created a trap for HeLa cells with a constant trap stiffness of 3x10-6 Nm-1 (capable of moving the cell up to 50μms-1) with a 12μm diameter trap. We also calculate the depth of the potential well that the cell will experience due to the trap and find that it to be 1.6x10-16J (4x104 kBT).

© 2009 Optical Society of America

OCIS Codes
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Optical Trapping and Manipulation

History
Original Manuscript: January 5, 2009
Revised Manuscript: March 12, 2009
Manuscript Accepted: March 14, 2009
Published: March 18, 2009

Virtual Issues
Vol. 4, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Steven L. Neale, Aaron T. Ohta, Hsan-Yin Hsu, Justin K. Valley, Arash Jamshidi, and Ming C. Wu, "Trap profiles of projector based optoelectronic tweezers (OET) with HeLa cells," Opt. Express 17, 5231-5239 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-7-5231


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