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Proceedings Paper

Ag/ZnO nanocomposites prepared by laser methods
Author(s): M. E. Koleva; A. Og. Dikovska; N. N. Nedyalkov; P. A. Atanasov; G. B. Atanasova
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Paper Abstract

The composite nanostructures of double layer, multilayer and mosaic Ag/ZnO containing nano-sized particles have been produced by laser deposition and annealing procedures. The samples are investigated and the results indicated that laser annealing of Ag or Ag/ZnO layer is a feasible method to tune the optical properties of the nanostructures. Their morphology and optical absorption were investigated as a function of annealing regime and preparation procedure, leading to different silver arrangement. All annealed samples showed surface plasmon resonance (SPR) properties. The red shifted SPR was observed with the increase of the number of layers and is associated with the reduction of the interparticle distance. The absorption minimum of a mosaic samples broadens towards the longer wavelengths with reducing the thickness, due to the broader NPs size distribution. A ZnO excitonic feature visible in the spectra of double layer and multilayer structures disappear in the spectrum of a mosaic sample. The X-ray photoelectron spectroscopy was used to study the composition and chemical state of the double layer Ag/ZnO nanocomposites on the surface and in depth. The binding energy of Ag3d5/2 shifts to the lower values compared to the pure metallic Ag due to the interaction between Ag and ZnO.

Paper Details

Date Published: 15 March 2013
PDF: 7 pages
Proc. SPIE 8770, 17th International School on Quantum Electronics: Laser Physics and Applications, 877007 (15 March 2013); doi: 10.1117/12.2013424
Show Author Affiliations
M. E. Koleva, Institute of Electronics (Bulgaria)
A. Og. Dikovska, Institute of Electronics (Bulgaria)
N. N. Nedyalkov, Institute of Electronics (Bulgaria)
P. A. Atanasov, Institute of Electronics (Bulgaria)
G. B. Atanasova, Institute of General and Inorganic Chemistry (Bulgaria)

Published in SPIE Proceedings Vol. 8770:
17th International School on Quantum Electronics: Laser Physics and Applications
Tanja N. Dreischuh; Albena T. Daskalova, Editor(s)

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