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Title: Mixed oxide nanoparticles and method of making

Abstract

Methods and apparatus for producing mixed oxide nanoparticulates are disclosed. Selected thermophilic bacteria cultured with suitable reducible metals in the presence of an electron donor may be cultured under conditions that reduce at least one metal to form a doped crystal or mixed oxide composition. The bacteria will form nanoparticles outside the cell, allowing easy recovery. Selection of metals depends on the redox potentials of the reducing agents added to the culture. Typically hydrogen or glucose are used as electron donors.

Inventors:
 [1];  [2];  [3];  [1]
  1. Oak Ridge, TN
  2. Knoxville, TN
  3. Columbia, MO
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
874704
Patent Number(s):
6444453
Application Number:
09/428,376
Assignee:
Ut-Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
C - CHEMISTRY C12 - BIOCHEMISTRY C12P - FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE {
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
mixed; oxide; nanoparticles; method; methods; apparatus; producing; nanoparticulates; disclosed; selected; thermophilic; bacteria; cultured; reducible; metals; presence; electron; donor; conditions; reduce; metal; form; doped; crystal; composition; outside; cell; allowing; easy; recovery; selection; depends; redox; potentials; reducing; agents; added; culture; typically; hydrogen; glucose; donors; reducing agent; electron donor; mixed oxide; /435/

Citation Formats

Lauf, Robert J, Phelps, Tommy J, Zhang, Chuanlun, and Roh, Yul. Mixed oxide nanoparticles and method of making. United States: N. p., 2002. Web.
Lauf, Robert J, Phelps, Tommy J, Zhang, Chuanlun, & Roh, Yul. Mixed oxide nanoparticles and method of making. United States.
Lauf, Robert J, Phelps, Tommy J, Zhang, Chuanlun, and Roh, Yul. Tue . "Mixed oxide nanoparticles and method of making". United States. https://www.osti.gov/servlets/purl/874704.
@article{osti_874704,
title = {Mixed oxide nanoparticles and method of making},
author = {Lauf, Robert J and Phelps, Tommy J and Zhang, Chuanlun and Roh, Yul},
abstractNote = {Methods and apparatus for producing mixed oxide nanoparticulates are disclosed. Selected thermophilic bacteria cultured with suitable reducible metals in the presence of an electron donor may be cultured under conditions that reduce at least one metal to form a doped crystal or mixed oxide composition. The bacteria will form nanoparticles outside the cell, allowing easy recovery. Selection of metals depends on the redox potentials of the reducing agents added to the culture. Typically hydrogen or glucose are used as electron donors.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {9}
}

Patent:

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Works referenced in this record:

Iron reduction by psychrotrophic enrichment cultures
journal, December 1999


Physiochemical, mineralogical, and isotopic characterization of magnetite-rich iron oxides formed by thermophilic iron-reducing bacteria
journal, November 1997


Dissimilatory Metal Reduction
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Thermophilic Fe(III)-Reducing Bacteria from the Deep Subsurface: The Evolutionary Implications
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Anaerobic production of magnetite by a dissimilatory iron-reducing microorganism
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Iron and Manganese in Anaerobic Respiration: Environmental Significance, Physiology, and Regulation
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Geology and Stable Isotope Geochemistry of the Biwabik Iron Formation, Northern Minnesota
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Magnetic Microstructure of Magnetotactic Bacteria by Electron Holography
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Enhancement of Fe(III), Co(III), and Cr(VI) reduction at elevated temperatures and by a thermophilic bacterium
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