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Deposition of Ordered Arrays of Metal Sulfide Nanoparticles in Nanostructures Using Supercritical Carbon Dioxide

Published online by Cambridge University Press:  31 January 2011

Joanna Wang
Affiliation:
[email protected], University of Idaho, Chemistry, Moscow, Idaho, United States
Alexander B. Smetana
Affiliation:
[email protected], University of Idaho, Chemistry, Moscow, Idaho, United States
John J. Boeckl
Affiliation:
[email protected], WPAFB, Materials and Manufacturing Directorate, Dayton, Ohio, United States
Gail J. Brown
Affiliation:
[email protected], WPAFB, Materials and Manufacturing Directorate, Dayton, Ohio, United States
Chien M. Wai
Affiliation:
[email protected], University of Idaho, Chemistry, Moscow, Idaho, United States
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Abstract

Silver sulfide (Ag2S) and cadmium sulfide (CdS) nanoparticles of adjustable sizes are synthesized using a water-in-hexane microemulsion method and stabilized by dodecanethiol. The stabilized metal sulfide nanoparticles can be deposited homogenously on flat substrates forming ordered 2D arrays in supercritical fluid carbon dioxide (Sc-CO2). The use of Sc-CO2 leaves the particles unaffected by de-wetting effects and surface tension caused by traditional solvents and produces uniform arrays. The Sc-CO2 deposition technique can effectively fill the metal sulfide nanoparticles into nanoscale features, which is difficult to achieve by conventional solvent evaporation methods.

Type
Research Article
Copyright
Copyright © Materials Research Society 2010

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