Nanolayers of the Au0x0SnO2 nanocomposite synthesized by successive ionic layer deposition method

Abstract

We studied possibilities of SILD (successive ionic layer deposition) technology for depositing nanocomposite Au0xSnO2 nanolayers. This new method of layer deposition is of high interest, because of the method’s simplicity, cheapness, and ability to deposit thin nano-structured films on rough surfaces. Aqueous 0.01 M solutions of SnCl2 and HAuCl4 were used as precursors for synthesis of the nanocomposite layers on the surface of silica and Si. Optical spectra of such layers are characterised by a band at 200–300 nm consistent with the electronic absorption of the Sn–O polyhedrons and a band at 560–570 nm due to a plasmon generated in the gold nanoparticles, while the FTIR spectra exhibit a band at 580 cm-1, characteristic for the Sn–O stretchings. Based on the spectral dependences on the sample heating in the 200-400 0C range, chemico-structural transformations of the layers were inferred.