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Microbially-mediated method for synthesis of non-oxide semiconductor nanoparticles

United States Patent

June 24, 2014
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
Fermentative Method for Making Nonoxide Fluorescent Nanoparticles (Quantum Dots)
The invention is directed to a method for producing non-oxide semiconductor nanoparticles, the method comprising: (a) subjecting a combination of reaction components to conditions conducive to microbially-mediated formation of non-oxide semiconductor nanoparticles, wherein said combination of reaction components comprises i) anaerobic microbes, ii) a culture medium suitable for sustaining said anaerobic microbes, iii) a metal component comprising at least one type of metal ion, iv) a non-metal component containing at least one non-metal selected from the group consisting of S, Se, Te, and As, and v) one or more electron donors that provide donatable electrons to said anaerobic microbes during consumption of the electron donor by said anaerobic microbes; and (b) isolating said non-oxide semiconductor nanoparticles, which contain at least one of said metal ions and at least one of said non-metals. The invention is also directed to non-oxide semiconductor nanoparticle compositions produced as above and having distinctive properties.
Phelps; Tommy J. (Knoxville, TN), Lauf; Robert J. (Oak Ridge, TN), Moon; Ji Won (Oak Ridge, TN), Rondinone; Adam J. (Arlington, VA), Love; Lonnie J. (Knoxville, TN), Duty; Chad Edward (Knoxville, TN), Madden; Andrew Stephen (Norman, OK), Li; Yiliang (Discovery Bay, HK), Ivanov; Ilia N. (Knoxville, TN), Rawn; Claudia Jeanette (Knoxville, TN)
UT-Battelle, LLC (Oak Ridge, TN), University of Tennessee Research Foundation (Knoxville, TN)
12/ 364,638
February 3, 2009
This invention was made with government support under Contract Number DE-AC05-00OR22725 between the United States Department of Energy and UT-Battelle, LLC. The United States government has certain rights in this invention.