Abstract
In order to evaluate the assembling processes of arbitrary-shaped nanoparticles (NPs) by the irradiation of a tailored laser beam under thermal fluctuations, we have developed a “Light-induced-force Nano Metropolis Method (LNMM)” as a new theoretical method based on the stochastic algorithm in the energy region and the general formula of light-induced force. By using LNMM, we have investigated the change of configurations of silver NPs with anisotropic shapes under the irradiation of laser beams with various polarizations and intensity distributions (Gaussian beam and axially-symmetric vector beams) in an aqueous solution at room temperature. As a result, it has been clarified that silver NPs can be selectively arranged into a characteristic spatial configuration reflecting the properties of an irradiated laser beam (wavelength, intensity distribution, and polarization distribution), and that the assembled structures possess broadband spectra and exhibit a strong optical response to the irradiated laser beam through the optimization with the help of fluctuations.
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Acknowledgments
The authors would like to thank Prof. T. Tsutsui, Prof. H. Ishihara, and Prof. H. Miyasaka for kind encouragement and support. Also, they thank Mr. S. Hidaka, Mr. H. Hattori, Dr. H. Yamauchi, Mr. Nishida, and Dr. T. Itoh for their fruitful discussion. This work was supported by PRESTO from the JST; a Grant-in-Aid for Scientific Research (B) No. 23310079; a Grant-in-Aid for Young Scientists (A) No. 23681023; the Grants-in-Aid for Exploratory Research No. 23655072 and No. 24654091 from the JSPS; and Special Coordination Funds for Promoting Science and Technology from the MEXT (Improvement of Research Environment for Young Researchers (FY 2008–2012).
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Tamura, M., Ito, S., Tokonami, S. et al. Theory for optical assembling of anisotropic nanoparticles by tailored light fields under thermal fluctuations. Res Chem Intermed 40, 2303–2313 (2014). https://doi.org/10.1007/s11164-014-1607-8
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DOI: https://doi.org/10.1007/s11164-014-1607-8