Supercritical Fluid Deposition of Uniform PbS Nanoparticle Films for Energy-Transfer Studies

Authors

  • Dr. Joanna S. Wang,

    1. Materials & Manufacturing Directorate, Air Force Research Laboratory, 3005 Hobson Way, Wright-Patterson Air Force Base, OH, 45433 (USA)
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  • Dr. Gail J. Brown,

    1. Materials & Manufacturing Directorate, Air Force Research Laboratory, 3005 Hobson Way, Wright-Patterson Air Force Base, OH, 45433 (USA)
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  • Dr. Wei-Chun Hung,

    1. Department of Chemistry, University of Idaho, Renfrew Hall Rm 116, Moscow, ID, 83844 (USA), Fax: (+1) 208-885-6173
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  • Dr. Chien M. Wai

    Corresponding author
    1. Department of Chemistry, University of Idaho, Renfrew Hall Rm 116, Moscow, ID, 83844 (USA), Fax: (+1) 208-885-6173
    • Department of Chemistry, University of Idaho, Renfrew Hall Rm 116, Moscow, ID, 83844 (USA), Fax: (+1) 208-885-6173
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Abstract

Using supercritical fluid CO2 (Sc-CO2) as a medium, PbS nanoparticles can be uniformly deposited on surfaces of various substrates. Sc-CO2 deposition of PbS nanoparticles on carbon-coated copper grids, into small holes in silicon, and formation of uniform PbS nanoparticle films on glass are described. Fluorescence spectra of PbS nanoparticles obtained from the films prepared by the Sc-CO2 method indicate effective energy transfer between PbS nanoparticles of different sizes.

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