Crystallite sizes and lattice parameters of nano-biomagnetite particles.
Average crystallite sizes of microbially synthesized pure, metal-, and lanthanide-substituted magnetite (bio-magnetite) were determined for a variety of incubation times and temperatures, substitutional elements and amounts, bacterial species, and precursor types. The intriguing difference between nanoparticle bio-magnetite and chemically synthesized magnetite (chem-magnetite) was that powder X-ray diffraction (XRD) data showed that the bio-magnetite exhibited slightly smaller lattice parameters, however, Raman Spectroscopy exhibited no difference in Fe-O bonding. These results indicate that bio-magnetite likely exhibits a more compact crystal structure with less uncoordinated iron on the surface suppressing negative pressure effects. The bio-magnetite with decreased lattice parameters could have potential technological advantages over current commercial chemically synthesized magnetites.
Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
Ji-Won
JW
Moon
Claudia J
CJ
Rawn
Adam J
AJ
Rondinone
Wei
W
Wang
Hajatollah
H
Vali
Lucas W
LW
Yeary
Lonnie J
LJ
Love
Melanie J
MJ
Kirkham
Baohua
B
Gu
Tommy J
TJ
Phelps
D052203:Ferrosoferric Oxide / Q000737:chemistry* / Q000378:metabolism; D058185:Magnetite Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D053758:Nanoparticles / Q000737:chemistry / Q000648:ultrastructure; D010316:Particle Size; D020592:Shewanella / Q000378:metabolism; D013059:Spectrum Analysis, Raman; D046968:Thermoanaerobacter / Q000378:metabolism; D014961:X-Ray Diffraction
D058185:Magnetite Nanoparticles; D052203:Ferrosoferric Oxide