NSTI Nanotech 2009

Controlled Attachment of Gold Nanoparticles on Ordered Titania Nanotube Arrays

M. AbdElmoula, E. Panaitescu, L. Menon
Northeastern University, US

Keywords: nanotubes, nanoparticles, gold, titania, fabrication

Abstract:

Gold nanoparticles have been deposited on electrochemically synthesized high-aspect ratio Titania nanotubes. Titania nanotubes with very long aspect ratio as long as 50microns are synthesized by means of electrochemical anodization of titanium foils in chlorine containing electrolytes. The tube dimensions (diameter, wall thickness and length) of the tubes can be controlled in our fabrication approach. The gold particles are deposited on the tubes by means of a modified deposition-precipitation method in HAuCl4 solution under controlled concentration of the solution. We show that by adjusting the fabrication conditions, we can obtain a high deposition density of the gold particles over the nanotube surface (over 70% coverage percentage ) and also have good control over the size of the gold nanoparticles (<5 nm). We show that there is an increase in particle size upon increasing the deposition period
 
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