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Proceedings Paper

Manipulation of microdisks in laser tweezers
Author(s): Zhengdong Cheng; A. Fernandez de las Nieves; Manuel Marquez; David A. Weitz; Thomas G. Mason; Paul M. Chaikin
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Paper Abstract

Short thin cylinders can be the basic part of mesoscopic actuators powered by laser tweezers. We demonstrate that micro size birefringent colloidal coins can be positioned translationally and orientationally in advance of the prediction of current theoretical modeling. Circularly polarized laser tweezers keep driving the rotation of the microdisk. Viscous flow between a hard wall and a microdisk excites the disk to an oscillation orbit. These disks can be fabricated via solidification of emulsion drops by tuning temperature or solvent concentration so that molecules in the drop assuming a smectic phase.

Paper Details

Date Published: 18 October 2004
PDF: 10 pages
Proc. SPIE 5514, Optical Trapping and Optical Micromanipulation, (18 October 2004); doi: 10.1117/12.556009
Show Author Affiliations
Zhengdong Cheng, Harvard Univ. (United States)
A. Fernandez de las Nieves, Harvard Univ. (United States)
Manuel Marquez, National Institute of Standards and Technology (United States)
The Nanotechnology Lab., Kraft Foods (United States)
David A. Weitz, Harvard Univ. (United States)
Thomas G. Mason, Univ. of California/Los Angeles (United States)
Paul M. Chaikin, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 5514:
Optical Trapping and Optical Micromanipulation
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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