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We report on the fabrication of two-dimensional periodic arrays of gold nanocylinders with an aspect ratio larger than 2 using solution-processible gold nanoparticles. We utilize the large surface energy of the melted gold in an annealing process at 260 degrees C to confine the gold nanoparticles into the nanoholes consisting the mask, on which the colloidal gold nanoparticles are spin coated, producing a two-dimensional square lattice of gold nanocylinders. The height of the nanocylinders is larger than 200 nm above an indium-tin-oxide waveguide layer and their diameter is about 100 nm. Optical extinction spectrum measurements show excellent particle plasmon resonances of the nanocylinders. (c) 2007 American Institute of Physics.
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