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Proceedings Paper

Study of a colloidal sphere near flat walls using oscillating optical tweezers
Author(s): Chungil Ha; H. Daniel Ou-Yang; Hyuk Kyu Pak
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Paper Abstract

We study the dynamics of a micron-sized colloidal sphere in two cases; one is for a particle near a single flat wall and the other is for a particle confined between two parallel flat walls. In this geometry, the force felt by a moving particle is quite different from that of a moving particle in unbounded space. Even though the presence of wall(s) complicates the flow field surrounding the colloidal sphere, the dynamics of a colloidal sphere near flat walls provides a model system with which to understand the phenomenon of more complex systems whose boundaries can be modeled as effective walls.[1] In this work, hydrodynamic interactions of colloidal sphere with nearby plat wall(s) are studied by using oscillating optical tweezers and compared with known theories and other experimental results using different techniques.

Paper Details

Date Published: 1 December 2009
PDF: 8 pages
Proc. SPIE 7507, 2009 International Conference on Optical Instruments and Technology: Optical Trapping and Microscopic Imaging, 750702 (1 December 2009); doi: 10.1117/12.843376
Show Author Affiliations
Chungil Ha, Pusan National Univ. (Korea, Republic of)
H. Daniel Ou-Yang, Lehigh Univ. (United States)
Hyuk Kyu Pak, Pusan National Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 7507:
2009 International Conference on Optical Instruments and Technology: Optical Trapping and Microscopic Imaging
Xiaocong Yuan; Yinmei Li; Arthur Chiou; Min Gu; Dennis Matthews; Colin Sheppard, Editor(s)

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