A BRIEF REVIEW ON IMMOBILIZATION OF GOLD NANOPARTICLES ON INORGANIC SURFACES AND SUCCESSIVE IONIC LAYER DEPOSITION

Abstract

In this review, peculiarities of the Gold nanoparticles synthesis on the solid support are discussed. This article focuses on the recent developments in various methods for immobilization of gold nanoparticles on solid surface. Particular attention is given to the synthesis of nanoparticles by Layer-by-Layer method and on the advances in the Successive Ionic Layer Deposition (SILD) methodology. The present review summarizes SILD work in this field to date and contributes a new experimental date for application SILD method in field of electrochemical sensor design. As an example the conditions of synthesis of gold nanoparticles on the surface of indium-tin oxide (ITO) electrode are described in this article. It has been shown that the size of synthesized nanostructures can be controlled by formation of intermediated layer. It was found that preliminary SILD synthesis of AuxSnO2.nH2O nanolayer on the ITO surface leads to significant changes in the morphology of subsequently synthesized gold nanoparticles. In this case the same number of cycles provides the formation of significantly smaller (10-20 nm) nanoparticles and greater surface coverage density. Electrodes obtained by this technique demonstrate lower oxidation and reduction potentials of gold as well as higher currents of these reactions.