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Title

Coupled laser molecular trapping, cluster assembly, and deposition fed by laser-induced Marangoni convection

Author(s)

Louchev, Oleg A;  Juodkazis, Saulius;  Murazawa, Naoki;  Wada, Satoshi;  Misawa, Hiroaki

Abstract

A coupled mechanism for molecular aggregation in a thin water solution film by laser-tweezers is suggested based on (i) simulation of light intensity distribution and (ii) order of magnitude analysis of heat and mass transport induced by Marangoni convection. The analysis suggests that the laser induced temperature distribution develops within 1 ms and Marangoni convection flow commences within 0.01-1 s, which increases by 1-2 orders of magnitude the mass transfer of dissolved molecules into the laser focus where they are trapped and aggregate by attractive van der Waals forces. This mechanism, considered for the particular case of polymer assembly, suggests that it can also be successfully applied for assembling other types of clusters and molecular aggregates from solutions.

Publication type

Journal article

Source

Optics Express, Vol. 16, no. 8 (Apr 2008), pp. 5673-5680

Publication year

2008

FOR Code(s)

0205 Optical Physics;  0903 Biomedical Engineering;  1113 Ophthalmology and Optometry

Keyword(s)

Cluster assembly;  Deposition;  Laser trapping;  Light intensity distribution;  Marangoni convection;  Optical tweezers;  Temperature

Publisher

Optical Society of America

ISSN

1094-4087

Publisher URL

http://dx.doi.org/10.1364/oe.16.005673

Copyright

Copyright © 2008 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/oe.16.005673. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

Additional information

The authors acknowledge support from the Grant-in-Aid from the Ministry of Education, Science, Sports, and Culture of Japan No.19360322.

Full text

Peer reviewed