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Laser grown gold nanoparticles on zinc oxide thin films for gas sensor applications

E. GYÖRGY1,2,* , A. GIANNOUDAKOS3, M. KOMPITSAS3, I. N. MIHAILESCU2

Affiliation

  1. Consejo Superior de Investigaciones Cientificas, Instituto de Ciencia de Materiales de Barcelona, Campus UAB, 08193 Bellaterra, Spain
  2. National Institute for Lasers, Plasma and Radiations Physics, P. O. Box MG 54, 77125 Bucharest, Romania
  3. National Hellenic Research Foundation, Theoretical and Physical Chemistry Institute, Vasileos Konstantinou Ave. 48, 11635 Athens, Greece

Abstract

Nanostructures formed by gold clusters and zinc oxide thin films have been synthesized by means of two step pulsed laser deposition. Zinc and gold targets were subsequently submitted to pulses generated by an UV KrF* (λ=248 nm, τFWHM≅20 ns, ν=2 Hz) excimer, as well as a frequency tripled Nd:YAG (λ=355 nm, τ∼10 ns) laser sources. The optical properties of the obtained nanostructures have been correlated with their surface morphology determined in turn by the growth parameters. The obtained results proved the possibility to tailor the gold / zinc oxide nanostructures optical properties by the proper choice of the number of laser pulses used for the ablation of the gold targets. The tunable optical features in the visible- near infrared spectral region allow for the design of nanostructures with pre-defined optical characteristics for advanced gas sensor applications..

Keywords

ZnO, Nanoparticle, Laser grown, Gas sensor.

Submitted at: Jan. 18, 2008
Accepted at: March 17, 2008

Citation

E. GYÖRGY, A. GIANNOUDAKOS, M. KOMPITSAS, I. N. MIHAILESCU, Laser grown gold nanoparticles on zinc oxide thin films for gas sensor applications, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 3, pp. 536-540 (2008)