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Nanostructured gold layers. II. Gold deposition onto polystyrene substrate

I. ZGURA1, T. BEICA1, S. FRUNZA1, O. RASOGA1, A. GALCA1, L. FRUNZA1,* , A. MOLDOVAN2, M. DINESCU2, C. ZAHARIA3

Affiliation

  1. National Institute of Materials Physics
  2. National Institute for Laser, Plasma and Radiation Physics
  3. Institute of Virology St. S. Nicolau of the Romanian Academy

Abstract

In the aim to improve the adherence of the nanostructured gold layers onto glass substrate, gold deposition has been first time performed onto a polystyrene (PS) layer. The PS layer of ca. 50nm was spin-coated onto glass plates from a toluene solution. Gold layers of 10-20nm were vacuum deposited at small incidence angle. We found that at variance from the plates with gold deposited directly on the glass, the plates with an intermediate PS layer do not peel under overnight treatment in ethanol solution. The layers were characterized by several methods. X-ray diffraction (XRD) measurements showed that gold peaks have the position corresponding to the face-centered cubic structure: However, the crystallites on the sample with PS layer seem to be a little bit smaller than those with gold deposited directly onto the glass. XR reflectometry measurements have given the thickness of the gold layer in good agreement with the value estimated from quartz monitor readings and with the ellipsometric data as well. Liquid crystal cells were obtained to observe the molecular alignment imposed by the nanostructured gold layer deposited onto PS film. A rather strong interaction of gold atoms with the substrate molecules can be considered on the basis of the XRD and ellipsometry measurements..

Keywords

Nanostructured gold layer, Vacuum deposition, Polystyrene substrate, Alignment of liquid crystals.

Submitted at: Nov. 4, 2009
Accepted at: Feb. 18, 2010

Citation

I. ZGURA, T. BEICA, S. FRUNZA, O. RASOGA, A. GALCA, L. FRUNZA, A. MOLDOVAN, M. DINESCU, C. ZAHARIA, Nanostructured gold layers. II. Gold deposition onto polystyrene substrate, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 2, pp. 354-358 (2010)