Laser tweezer technique for study of gelation process

Andrey N. Kuzmin; Aliaksandr V. Kachynski; Tymish Y. Ohulchanskyy; Indrajit Roy; Stanley Bruckenstein; Paras N. Prasad

doi:10.1117/12.588679

14 March 2005 Laser tweezer technique for study of gelation process

Andrey N. Kuzmin, Aliaksandr V. Kachynski, Tymish Y. Ohulchanskyy, Indrajit Roy, Stanley Bruckenstein, Paras N. Prasad

Proceedings Volume 5736, Nanomanipulation with Light; (2005) https://doi.org/10.1117/12.588679
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

Abstract

Laser tweezer trapping technology has been applied to monitor the bulk local solution viscosity during the sol-gel gelation process. The gelation rate is the same in depth ranges 2 - 20 microns from the bounding surface. Simultaneously with the laser tweezer study, a micro-viscosity kinetic measurement of the sol-gel process was performed using fluorescent anisotropy and quantum yield measurements. The differences between the bulk- and micro-viscosities obtained in the experiment reflect the intrinsic differences in solution environment sensed by the laser tweezer on the macro level and by other optical techniques within the probe microscopic environment.

Citation Download Citation

Andrey N. Kuzmin, Aliaksandr V. Kachynski, Tymish Y. Ohulchanskyy, Indrajit Roy, Stanley Bruckenstein, and Paras N. Prasad "Laser tweezer technique for study of gelation process", Proc. SPIE 5736, Nanomanipulation with Light, (14 March 2005); https://doi.org/10.1117/12.588679

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