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MICROBIALLY-MEDIATED METHOD FOR SYNTHESIS OF METAL CHALCOGENIDE NANOPARTICLES

United States Patent Application

20180010153
A1
View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A method for producing metal chalcogenide nanoparticles, the method comprising: (i) producing hydrogen chalcogenide-containing vapor from a microbial source, wherein said microbial source comprises: (a) chalcogen-reducing microbes capable of producing hydrogen chalcogenide vapor from a chalcogen-containing source; (b) a culture medium suitable for sustaining said chalcogen-reducing microbes; (c) at least one chalcogen-containing compound that can be converted to hydrogen chalcogenide vapor by said chalcogen-reducing microbes; and (d) at least one nutritive compound that provides donatable electrons to said chalcogen-reducing microbes during consumption of the nutritive compound by said chalcogen-reducing microbes; and (ii) directing said hydrogen chalcogenide-containing vapor into a metal-containing solution comprising a metal salt dissolved in a solvent to produce metal chalcogenide nanoparticles in said solution, wherein said chalcogen is sulfur or selenium, and said chalcogenide is sulfide or selenide, respectively. The invention is also directed to metal chalcogenide nanoparticle compositions produced as above and having distinctive properties.
MOON, Ji Won (Oak Ridge, TN), PHELPS, Tommy Joe (Knoxville, TN), OREMLAND, Ronald (Brisbane, CA), GRAHAM, David E. (Knoxville, TN), IVANOV, Ilia N. (Knoxville, TN), JACOBS, Christopher B. (Knoxville, TN), JANG, Gyoung Gug (Knoxville, TN), KIDDER, Michelle K. (Clinton, TN), JOSHI, Pooran C. (Knoxville, TN), ARMSTRONG, Beth L. (Clinton, TN)
15/ 643,610
July 7, 2017
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH [0002] This invention was made with government support under Prime Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.