Abstract
A simple procedure for fabrication of gold films with nanorod arrays is described. The methodis based on thermal evaporation of gold onto a porous alumina (PA) membrane used as atemplate. The gold films were obtained after removing the template and characterizedusing scanning electron microscopy, atomic force microscopy and ultraviolet–visiblespectrophotometry. The prepared gold films are composed of arrays of sharp(<20 nm at apex) rod-shaped gold nanostructures. These structures closely follow the organizationand distribution of pores of the PA template. The length of the gold nanostructures isestimated to range from 300 nm to more than 1000 nm. It was found that their length isinfluenced by the size of the pores in the PA and the temperature of the PA during goldevaporation. Spectrophotometric characterization shows that the prepared gold filmsexhibit a surface plasmon resonance absorption peak located between 525 and 540 nm.
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