TY - JOUR
T1 - Characteristics of hollow microtubes consisting of amorphous iron oxide nanoparticles produced by iron oxidizing bacteria, Leptothrix ochracea
AU - Hashimoto, H.
AU - Yokoyama, S.
AU - Asaoka, H.
AU - Kusano, Y.
AU - Ikeda, Y.
AU - Seno, M.
AU - Takada, J.
AU - Fujii, T.
AU - Nakanishi, M.
AU - Murakami, R.
N1 - Funding Information:
The authors are indebted to K. Tsunai, Y. Kitazawa, and M. Yamaoka for supplying iron oxide precipitates and to T. Katamoto, Y. Ishimaru, and M. Nakamachi for fruitful discussions. This work was supported by a Grant-in-Aid for Exploratory Research (No.17651071) from the Ministry of Education, Science, Sports, and Culture of Japan.
PY - 2007/3
Y1 - 2007/3
N2 - Some features of characteristic iron oxide sheaths which the iron oxidizing bacteria Leptothrix ochracea (L. oceracea) formed were studied in order to make clear their morphology microstructure, chemical composition, and crystal structure through scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDX), and X-ray diffraction (XRD). Each sheath was a hollow tube with average outer and inner diameters of 1.1 and 1.4 μm, respectively. Their length ranged from 10 to 200 μm and the aspect ratio was 10-200. Each sheath was constructed by very small particles with a diameter of less than 100 nm. The hollow sheaths were mainly composed of Fe and O with small amounts of Si and P. The chemical composition analyzed by EDX was roughly Fe:Si:P=80:15:5 with the exception of O. XRD measurement revealed that crystal structures of the sheath were similar to that of 2-line ferrihydrite. The sheath showed spin-glass-like magnetic properties.
AB - Some features of characteristic iron oxide sheaths which the iron oxidizing bacteria Leptothrix ochracea (L. oceracea) formed were studied in order to make clear their morphology microstructure, chemical composition, and crystal structure through scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDX), and X-ray diffraction (XRD). Each sheath was a hollow tube with average outer and inner diameters of 1.1 and 1.4 μm, respectively. Their length ranged from 10 to 200 μm and the aspect ratio was 10-200. Each sheath was constructed by very small particles with a diameter of less than 100 nm. The hollow sheaths were mainly composed of Fe and O with small amounts of Si and P. The chemical composition analyzed by EDX was roughly Fe:Si:P=80:15:5 with the exception of O. XRD measurement revealed that crystal structures of the sheath were similar to that of 2-line ferrihydrite. The sheath showed spin-glass-like magnetic properties.
KW - 2-line ferrihydrite
KW - Chemical composition
KW - Hollow sheath
KW - Iron oxidizing bacteria
KW - Leptothrix ochracea
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U2 - 10.1016/j.jmmm.2006.10.793
DO - 10.1016/j.jmmm.2006.10.793
M3 - Article
AN - SCOPUS:33847612782
VL - 310
SP - 2405
EP - 2407
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
IS - 2 SUPPL. PART 3
ER -