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Proceedings Paper

Formation of bimetallic nanoparticles by pulsed laser ablation of multicomponent thin films in water
Author(s): R. G. Nikov; N. N. Nedyalkov; A. S. Nikolov; P. A. Atanasov; M. T. Alexandrov; D. B. Karashanova
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Paper Abstract

This study presents results on pulsed laser ablation of metallic and bimetallic thin films immersed in liquids. The thin films are deposited by classical on-axis pulsed laser deposition technology by using targets consisted of one or two sections composed of different metals. Using this technique gold, silver and gold/silver thin films are deposited on quartz substrate. By changing the area of the different sections of the target, thin films with different concentrations of the two metals are obtained. The as prepared films are then placed on the bottom of glass vessel filled with double distilled water and irradiated by nanosecond laser pulses delivered by Nd:YAG laser system operated at λ = 1064 nm. This results in fabrication of colloids composed by metallic and bimetallic nanoparticles. The performed TEM analyses revealed spherical and spherical-like shape of the particles produced. The optical extinction spectra of the obtained colloidal nanoparticles show plasmon excitations as the resonance wavelength can be efficiently tuned in a wide range by changing the ratio of the basic metals in the films.

Paper Details

Date Published: 8 January 2015
PDF: 7 pages
Proc. SPIE 9447, 18th International School on Quantum Electronics: Laser Physics and Applications, 94470M (8 January 2015); doi: 10.1117/12.2175638
Show Author Affiliations
R. G. Nikov, Institute of Electronics (Bulgaria)
N. N. Nedyalkov, Institute of Electronics (Bulgaria)
A. S. Nikolov, Institute of Electronics (Bulgaria)
P. A. Atanasov, Institute of Electronics (Bulgaria)
M. T. Alexandrov, Institute of Experimental Pathology and Parasitology (Bulgaria)
D. B. Karashanova, Institute of Optical Materials and Technologies (Bulgaria)


Published in SPIE Proceedings Vol. 9447:
18th International School on Quantum Electronics: Laser Physics and Applications
Tanja Dreischuh; Sanka Gateva; Alexandros Serafetinides, Editor(s)

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