Study of a colloidal sphere near flat walls using oscillating optical tweezers

Chungil Ha; H. Daniel Ou-Yang; Hyuk Kyu Pak

doi:10.1117/12.843376

1 December 2009 Study of a colloidal sphere near flat walls using oscillating optical tweezers

Chungil Ha, H. Daniel Ou-Yang, Hyuk Kyu Pak

Proceedings Volume 7507, 2009 International Conference on Optical Instruments and Technology: Optical Trapping and Microscopic Imaging; 750702 (2009) https://doi.org/10.1117/12.843376
Event: International Conference on Optical Instrumentation and Technology, 2009, Shanghai, China

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.

Citation Download Citation

Chungil Ha, H. Daniel Ou-Yang, and Hyuk Kyu Pak "Study of a colloidal sphere near flat walls using oscillating optical tweezers", Proc. SPIE 7507, 2009 International Conference on Optical Instruments and Technology: Optical Trapping and Microscopic Imaging, 750702 (1 December 2009); https://doi.org/10.1117/12.843376

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