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Proceedings Paper

Photomelting and photofragmentation of silver nanoparticles suspended in ethanol
Author(s): J. G. Ortega-Mendoza; C. Hernández-Álvarez; A. Padilla-Vivanco; C. Toxqui-Quitl; P. Zaca-Moran; F. Chávez; O. Goiz
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Paper Abstract

An optical method to obtain a colloidal solution starting from a mixture of silver nanopowder and ethanol is presented. The particles of the silver nanopowder do not exhibit a specific shape, however in the colloidal solution are spherical. This method is carry out when the mixture is irradiated with a pulsed laser at 532 nm via optical fiber. Due to a stronger absorption of the laser light by silver nanoparticles arise both photofragmentation and photomelting processes. The photomelting process starts when the laser energy is 5 mJ/cm2, inducing an enlargement of nanoparticles whereas the photofragmentation occurs when the laser energy is 25 mJ/cm2 causing a reduction on their sizes (the higher energy is, the smaller nanoparticles are). Results show that it is possible to obtain a colloidal silver solution and to control the particle size by adjusting the laser energy. Experiments were performed at 5 and 25 mJ/cm2, and the results are presented.

Paper Details

Date Published: 9 October 2015
PDF: 6 pages
Proc. SPIE 9545, Nanophotonic Materials XII, 954510 (9 October 2015); doi: 10.1117/12.2188730
Show Author Affiliations
J. G. Ortega-Mendoza, Univ. Politécnica de Tulancingo (Mexico)
C. Hernández-Álvarez, Univ. Politécnica de Tulancingo (Mexico)
A. Padilla-Vivanco, Univ. Politécnica de Tulancingo (Mexico)
C. Toxqui-Quitl, Univ. Politécnica de Tulancingo (Mexico)
P. Zaca-Moran, Benemérita Univ. Autónoma de Puebla (Mexico)
F. Chávez, Benemérita Univ. Autónoma de Puebla (Mexico)
O. Goiz, Instituto Politécnico Nacional (Mexico)

Published in SPIE Proceedings Vol. 9545:
Nanophotonic Materials XII
Stefano Cabrini; Gilles Lérondel; Adam M. Schwartzberg; Taleb Mokari, Editor(s)

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