Web Release Date: January 29,
Deposition of Ordered Arrays of Gold and Platinum Nanoparticles with an Adjustable Particle Size and Interparticle Spacing Using Supercritical CO2
and
Department of Chemistry, University of Idaho, Moscow, Idaho 83844, and Air Force Research Lab, Materials and Manufacturing Directorate, WPAFB, Dayton, Ohio 45433-7707
Received: October 9, 2007
In Final Form: November 25, 2007
Abstract:
Gold and platinum nanoparticles were prepared using a reverse micelle technique, creating products with several particle sizes. The stabilized metal nanoparticles can be deposited over long-range distances forming ordered arrays using supercritical carbon dioxide to remove the colloid solvent. The use of supercritical carbon dioxide creates uniformly deposited particle layers and can be removed without disturbing the precipitated particles. We also show that these nanoparticles can be deposited efficiently in nanometer trenches, which is not possible using conventional particle deposition by liquid evaporation.
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