TY - JOUR
T1 - Amorphous structure of iron oxide of bacterial origin
AU - Hashimoto, Hideki
AU - Fujii, Tatsuo
AU - Kohara, Shinji
AU - Asaoka, Hiroshi
AU - Kusano, Yoshihiro
AU - Ikeda, Yasunori
AU - Nakanishi, Makoto
AU - Benino, Yasuhiko
AU - Nanba, Tokuro
AU - Takada, Jun
N1 - Funding Information:
This study was financially supported by the Special Funds for Education and Research from the Ministry of Education, Culture, Sports, Science and Technology (J. T.) and JSPS KAKENHI Grant Number 22860040 , 24760550 , 23360309 . The synchrotron radiation experiments were performed at BL04B2 in SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No. 2007A1883).
PY - 2012/12/14
Y1 - 2012/12/14
N2 - In nature, there are various iron oxides produced by the water-habitant bacterial group called "iron-oxidizing bacteria". These iron oxides have been studied mainly from biological and geochemical perspectives. Today, attempts are made to use such iron oxides as novel functional materials in several applications. However, their quantitative structural characteristics are still unclear. We studied the structure of iron oxide of microtubular form consisting of amorphous nanoparticles formed by an iron-oxidizing bacterium, Leptothrix ochracea, using a combination of high-energy X-ray diffraction and reverse Monte Carlo simulation. We found that its structure consists of a framework of corner- and edge-sharing distorted FeO6 octahedral units, while SiO4 tetrahedral units are isolated in the framework. The results reveal the atomic arrangement of iron oxide of bacterial origin, which is essential for investigating its potential as a functional material.
AB - In nature, there are various iron oxides produced by the water-habitant bacterial group called "iron-oxidizing bacteria". These iron oxides have been studied mainly from biological and geochemical perspectives. Today, attempts are made to use such iron oxides as novel functional materials in several applications. However, their quantitative structural characteristics are still unclear. We studied the structure of iron oxide of microtubular form consisting of amorphous nanoparticles formed by an iron-oxidizing bacterium, Leptothrix ochracea, using a combination of high-energy X-ray diffraction and reverse Monte Carlo simulation. We found that its structure consists of a framework of corner- and edge-sharing distorted FeO6 octahedral units, while SiO4 tetrahedral units are isolated in the framework. The results reveal the atomic arrangement of iron oxide of bacterial origin, which is essential for investigating its potential as a functional material.
KW - Amorphous materials
KW - Computer modeling and simulation
KW - Oxides
KW - X-ray scattering
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U2 - 10.1016/j.matchemphys.2012.10.002
DO - 10.1016/j.matchemphys.2012.10.002
M3 - Article
AN - SCOPUS:84870054268
SN - 0254-0584
VL - 137
SP - 571
EP - 575
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
IS - 2
ER -