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Excimer laser photofragmentation of metallic nanoparticles
Faculty
Science
Year:
2007
Type of Publication:
Article
Pages:
158-161
Authors:
Mahmoud, M. A, Badr, Y
DOI:
10.1016/j.physleta.2007.04.042
Journal:
PHYSICS LETTERS A ELSEVIER SCIENCE BV
Volume:
370
Research Area:
Physics
ISSN
ISI:000250591600015
Keywords :
copper nanoparticles, excimer laser, silver, photofragmentation
Abstract:
Copper nanoparticles (Cu NPs) were prepared by different chemical methods possessing different sizes. While, silver nanoparticles (Ag NPs) were prepared by borohydride reduction method. The influences the changes in sizes of Ag NPs and Cu NPs were demonstrated by the absorption spectra. When Ag NPs and Cu NPs irradiated with 193 and 308 nm excimer laser, respectively; the maximum absorption decreased as the number of pulses increased up to 10 thousands pulse; due to the size reduction. The TEM photography gives good criteria about the size reduction process. Moreover, the mechanism of photofragmentation was described. (C) 2007 Elsevier B.V. All rights reserved.
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