Characteristics of hollow microtubes consisting of amorphous iron oxide nanoparticles produced by iron oxidizing bacteria, Leptothrix ochracea
作者： H. Hashimoto , S. Yokoyama , H. Asaoka , Y. Kusano , Y. Ikeda
DOI: 10.1016/J.JMMM.2006.10.793
关键词: Amorphous solid 、 Microstructure 、 Scanning electron microscope 、 Iron bacteria 、 Ferrihydrite 、 Chemical engineering 、 Iron oxide 、 Materials science 、 Chemical composition 、 Iron oxide nanoparticles
摘要: Abstract Some features of characteristic iron oxide sheaths which the 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), diffraction (XRD). Each sheath was a hollow tube with average outer inner diameters 1.1 1.4 μm, respectively. Their length ranged from 10 200 μm aspect ratio 10–200. constructed by very small particles diameter less than 100 nm. The mainly composed Fe O amounts Si P. composition analyzed EDX roughly Fe:Si:P=80:15:5 exception O. XRD measurement revealed that structures similar 2-line ferrihydrite. showed spin-glass-like magnetic properties.
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