TY - JOUR
T1 - Biogenic vs. abiogenic magnetite nanoparticles
T2 - A XMCD study
AU - Carvallo, Claire
AU - Sainctavit, Philippe
AU - Arrio, Marie Anne
AU - Menguy, Nicolas
AU - Wang, Yuheng
AU - Ona-Nguema, Georges
AU - Brice-Profeta, Sandrine
PY - 2008
Y1 - 2008
N2 - X-ray magnetic circular dichroism (XMCD) experiments were carried out to compare the Fe2+/Fe3+ ratio in nanomagnetite chemically produced from lepidocrocite and nanomagnetite biogenically produced by the Fe-reducing bacterium Shewanella putrefaciens. Together with TEM imaging, these measurements showed that the biotic magnetite nanoparticles were of excellent quality, with small size dispersion and high crystallinity. From the XMCD measurements, it could be shown that the biogenic nanomagnetite contained a higher amount of Fe2+ than the abiogenic nanomagnetite.
AB - X-ray magnetic circular dichroism (XMCD) experiments were carried out to compare the Fe2+/Fe3+ ratio in nanomagnetite chemically produced from lepidocrocite and nanomagnetite biogenically produced by the Fe-reducing bacterium Shewanella putrefaciens. Together with TEM imaging, these measurements showed that the biotic magnetite nanoparticles were of excellent quality, with small size dispersion and high crystallinity. From the XMCD measurements, it could be shown that the biogenic nanomagnetite contained a higher amount of Fe2+ than the abiogenic nanomagnetite.
KW - Biomineralization
KW - Nanomagnetite
KW - Shewanella putrefaciens
KW - XMCD
UR - http://www.scopus.com/inward/record.url?scp=46649113960&partnerID=8YFLogxK
U2 - 10.2138/am.2008.2713
DO - 10.2138/am.2008.2713
M3 - 文章
AN - SCOPUS:46649113960
SN - 0003-004X
VL - 93
SP - 880
EP - 885
JO - American Mineralogist
JF - American Mineralogist
IS - 5-6
ER -