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Proceedings Paper

Influence of the scanning conditions on the characteristics of the nanostructures fabricated by laser ablation in liquid
Author(s): A. S. Nikolov; R. G. Nikov; N. N. Nedyalkov; T. I. Koutzarova; M. T. Alexandrov; D. B. Karashanova; C. Ristoscu; I. N. Mihailescu
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Paper Abstract

Pulsed laser ablation was used to create Ag nanostructures – nanoparticles and nanowires. Two different type of target motion were used – rotation and computer controlled by using an XY stage. The impact was investigated of the trajectory of the laser beam on the target surface on the characteristics of the ablation process itself and the nanostructures obtained. Two circular trajectories of different diameters generated at the target rotation were utilized. The fundamental (λ = 1064 nm) and the third harmonic (λTHG = 355 nm) wavelengths of a Nd-YAG laser system were used for the fabrication procedure. They were selected in order to study the influence of the two processes accompanying the ablation procedure, namely, scattering and absorption of the incident light by the nanostructures already created (the so-called self-absorption). The two possible nanostructures – nanoparticles and nanowires, were obtained by an appropriate choice of the laser fluence for each of the wavelengths selected. The optical extinction spectra of the fabricated colloids allowed an indirect assessment of the shape and size-distribution of the nanostructures obtained, whose size and morphology were visualized by transmission electron microscopy (TEM). It was established that the most appropriate processing conditions in terms of the efficiency of the ablation and reproducibility of the sample characteristics were achieved using a computer controlled XY stage.

Paper Details

Date Published: 8 January 2015
PDF: 8 pages
Proc. SPIE 9447, 18th International School on Quantum Electronics: Laser Physics and Applications, 94470L (8 January 2015); doi: 10.1117/12.2175651
Show Author Affiliations
A. S. Nikolov, Institute of Electronics (Bulgaria)
R. G. Nikov, Institute of Electronics (Bulgaria)
N. N. Nedyalkov, Institute of Electronics (Bulgaria)
T. I. Koutzarova, Institute of Electronics (Bulgaria)
M. T. Alexandrov, Institute of Experimental Pathology and Parasitology (Bulgaria)
D. B. Karashanova, Institute of Optical Materials and Technologies (Bulgaria)
C. Ristoscu, National Institute for Laser, Plasma and Radiation Physics (Romania)
I. N. Mihailescu, National Institute for Laser, Plasma and Radiation Physics (Romania)

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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