title: Microbial Synthesis and Characterization of Superparamagnetic Zn-Substituted Magnetite Nanoparticles.
abstract: The objective of this study is to examine microbial synthesis of magnetite and Zn-substituted magnetite nanoparticles by iron-reducing bacteria (Clostridium sp.) enriched from intertidal flat sediments. The magnetite nanoparticles were synthesized by the bacteria under anaerobic conditions at room temperature using akaganeite (β-FeOOH) or Zn-substituted akaganeite (β-ZnxFe1-xOOH) as a magnetite precursor during glucose fermentation. This research indicates that fermentation processes can establish the microbial synthesis of magnetite and Zn-substituted magnetite when conditions are at room temperature, ambient pressure, and pH values near neutral to slightly basic (pH < 8).
authors.forename: Yumi
authors.initials: Y
authors.lastname: Kim
authors.forename: Yul
authors.initials: Y
authors.lastname: Roh
mesh_terms: D003013:Clostridium / Q000145:classification / Q000378:metabolism*; D017097:Electric Impedance; D005290:Ferric Compounds / Q000737:chemistry / Q000378:metabolism*; D019015:Geologic Sediments / Q000382:microbiology*; D060526:Magnetic Fields; D058185:Magnetite Nanoparticles / Q000737:chemistry* / Q000382:microbiology* / Q000648:ultrastructure; D008422:Materials Testing; D010316:Particle Size; D013045:Species Specificity; D013499:Surface Properties; D015032:Zinc / Q000737:chemistry / Q000378:metabolism*
chemical_list: D005290:Ferric Compounds; D058185:Magnetite Nanoparticles; C473845:akaganeite; D015032:Zinc