Single crystal formation of amino acid with high temporal controllability by combining femtosecond and continuous wave laser trapping
We investigated laser trapping crystallization of glycine by using femtosecond (fs) laser as a trapping light source. Impulsively exerted fs laser pulses crystallized glycine more effectively than that induced by continuous wave (CW) laser trapping. Highly efficient crystallization and crystal growth behavior indicates fs laser irradiation increased the concentration not only at the focal spot, but also around the laser focus. Furthermore, we found that irradiation of fs pulses to CW laser-induced locally high supersaturation region enables immediate crystallization. Spatiotemporally controlled triggering of a single crystal formation with sub-second time resolution has achieved by integrating fs and CW laser trapping techniques.
KeywordsFocal Spot Crystallization Time Nanosecond Laser Pulse Laser Trapping Single Crystal Formation
The authors would like to thank the National Science Council of Taiwan (Contract No. NSC 101-2113-M-009-022-MY2 (to A.M.) and NSC 98-211-M-009-001 (to H.M.)) and MOE-ATU Project (National Chiao Tung University) of the Ministry of Education of Taiwan (to H.M) for partially supporting this research.
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- 17.P. Vekilov, Biophys. J. 86, 671 (2004)Google Scholar