Optical trapping near a charged surface: three-dimensional optical binding of colloids

S. Ahlawat; R. Dasgupta; P. K. Gupta

doi:10.1117/12.740964

26 April 2007 Optical trapping near a charged surface: three-dimensional optical binding of colloids

S. Ahlawat, R. Dasgupta, P. K. Gupta

Proceedings Volume 6535, Saratov Fall Meeting 2006: Optical Technologies in Biophysics and Medicine VIII; 65350W (2007) https://doi.org/10.1117/12.740964
Event: Saratov Fall Meeting 2006, 2006, Saratov, Russian Federation

Abstract

We report three-dimensional trapping of charge stabilized colloidal particles near a charged surface (glass boundary), using a low numerical aperture objective. The trapping arises due to balancing action between optical forces and electrostatic repulsions. The observation of 3-d colloidal clusters and a linear array of colloidal microspheres along the trap beam and the possible reasons thereof are also discussed.

Citation Download Citation

S. Ahlawat, R. Dasgupta, and P. K. Gupta "Optical trapping near a charged surface: three-dimensional optical binding of colloids", Proc. SPIE 6535, Saratov Fall Meeting 2006: Optical Technologies in Biophysics and Medicine VIII, 65350W (26 April 2007); https://doi.org/10.1117/12.740964

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