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Proceedings Paper

Three-dimensional fiber optical trap for cell manipulation and force measurement
Author(s): Yuxiang Liu; Miao Yu
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Paper Abstract

Three dimensional cell manipulation using two inclined fibers with lensed tips is demonstrated. For the first time, the relationship between optical forces and cell positions is experimentally characterized in such an optical fiber trap, which exhibits a good linearity in the vicinity of the equilibrium. The system is capable of being a force sensor with a resolution of around 1 pN/&mgr;m. The spring constant is found to be dependent on the cell's shape: a prolate cell entails a larger spring constant than that of a round cell with a similar size. Numerical analysis is carried out by using a modified ray optics model with a spheroidal object in the trap. The spring constant obtained from the analysis also depends on the shape of a cell, which agrees with the experimental results. The fiber optical tweezers have great potential for threedimensional manipulation and force measurement of cells.

Paper Details

Date Published: 11 April 2007
PDF: 9 pages
Proc. SPIE 6528, Nanosensors, Microsensors, and Biosensors and Systems 2007, 65280Z (11 April 2007); doi: 10.1117/12.715457
Show Author Affiliations
Yuxiang Liu, Univ. of Maryland, College Park (United States)
Miao Yu, Univ. of Maryland, College Park (United States)

Published in SPIE Proceedings Vol. 6528:
Nanosensors, Microsensors, and Biosensors and Systems 2007
Vijay K. Varadan, Editor(s)

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