title: Growth mechanism of amorphous selenium nanoparticles synthesized by Shewanella sp. HN-41.
abstract: Shewanella sp. HN-41 was exploited for selenium nanoparticles synthesis from aqueous selenite compounds under anaerobic conditions. Various reaction conditions, including reaction time, initial biomass, and initial selenite concentration, were systematically investigated to determine their effects on particle size distribution and formation rate. The biomass concentration of Shewanella sp. HN-41 had no significant effect on average particle size but strongly influenced reduction rate and size distribution. Initial selenite concentration (0.01-1.0 mM) also had no significant effect on the average particle size, but affected the early growth stage mechanism of selenium particle production, which was modeled using a Michaelis Menten model. The HR-TEM and SAED patterns indicated that the synthesized selenium nanoparticles were amorphous.
authors.affiliation: Department of Chemical and Environmental Engineering, University of California, Riverside, CA 92521, USA.
authors.forename: Kawai
authors.initials: K
authors.lastname: Tam
authors.forename: Cuong Tu
authors.initials: CT
authors.lastname: Ho
authors.forename: Ji-Hoon
authors.initials: JH
authors.lastname: Lee
authors.forename: Min
authors.initials: M
authors.lastname: Lai
authors.forename: Chong Hyun
authors.initials: CH
authors.lastname: Chang
authors.forename: Youngwoo
authors.initials: Y
authors.lastname: Rheem
authors.forename: Wilfred
authors.initials: W
authors.lastname: Chen
authors.forename: Hor-Gil
authors.initials: HG
authors.lastname: Hur
authors.forename: Nosang V
authors.initials: NV
authors.lastname: Myung
mesh_terms: D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D012643:Selenium / Q000737:chemistry* / Q000378:metabolism*; D020592:Shewanella / Q000378:metabolism*; D018038:Sodium Selenite / Q000737:chemistry / Q000378:metabolism; D014867:Water / Q000737:chemistry
chemical_list: D014867:Water; D012643:Selenium; D018038:Sodium Selenite