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Fermentative Method for Making Nonoxide Fluorescent Nanoparticles (Quantum Dots)

Oak Ridge National Laboratory

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Incubation of quantum dots
Incubation of quantum dots

Technology Marketing SummaryA fermentative method for scalable, economical production of tailored quantum dots.DescriptionA method for manufacturing nanoparticles of certain nonoxide compounds of metals and nonmetals. The metals are typically Zn, Ag, Hg, Cd, Fe, while the nonmetals are typically S, As, Se, and Te. Through the process of bacterial metabolism, the desired nonoxide compound is produced externally to the bacterial cells and may be collected as nanometer-sized particles.Benefits
  • Facilitates the economical production of tailored quantum dots via a scalable production scheme
  • Costs less than 1% of traditional production methods
  • Scalable production scenario
  • Structure & size can be tailored
Applications and Industries
  • LED displays
  • Signs
  • Photovoltaics
  • Biomedical treatments
  • Fluors
  • Dyes
  • Light-to-energy production
  • Friend/Foe battlefield tagging
Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Patent 8,759,053
Microbially-mediated method for synthesis of non-oxide semiconductor nanoparticles
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.
Oak Ridge National Laboratory 06/24/2014
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
ORNL ID#1968DevelopmentAvailable01/22/201002/02/2010

Contact ORNL About This Technology

To: Nestor Fronco<>