Share Email Print
cover

Proceedings Paper

Preparation of gold and silver nanoparticles by pulsed laser ablation of solid target in water
Author(s): R. G. Nikov; A. S. Nikolov; P. A. Atanasov
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Colloidal solutions of gold and silver nanoparticles (NPs) were prepared using a method pulsed laser ablation of target in liquid media. A gold and silver targets immersed in double distilled water are irradiated for 20 min by laser pulses with duration of 15 ns and repetition rate of 10 Hz. In order to investigate influences of laser wavelength and fluence on the particle size, shape and optical properties the experiments were preformed by using two different wavelength - the fundamental and the second harmonic (SH) (λ = 1064 and 532 nm, respectively) of a Nd:YAG laser system. Two different values of the laser fluence for each wavelength at the experimental conditions chosen were used and thus it was changed from several J/cm2 to tens of J/cm2. For characterization of the NPs shape and size distribution were used transmission electron microscope (TEM) and optical transmission spectroscopy in the near UV and in the visible region. Spherical shape of the nanoparticles at the low laser fluence and appearance of aggregation and building of nanowires at the SH and high laser fluence is seen. Dependence of the mean particle size at the SH on the laser fluence was established. The mean diameter of gold NPs became smaller with decrease in laser wavelength.

Paper Details

Date Published: 17 January 2011
PDF: 8 pages
Proc. SPIE 7747, 16th International School on Quantum Electronics: Laser Physics and Applications, 774708 (17 January 2011); doi: 10.1117/12.881908
Show Author Affiliations
R. G. Nikov, Institute of Electronics (Bulgaria)
A. S. Nikolov, Institute of Electronics (Bulgaria)
P. A. Atanasov, Institute of Electronics (Bulgaria)


Published in SPIE Proceedings Vol. 7747:
16th International School on Quantum Electronics: Laser Physics and Applications
Tanja Dreischuh; Dimitar Slavov, Editor(s)

© SPIE. Terms of Use
Back to Top