Controlled biomineralization of magnetite (Fe3O4) by Magnetospirillum gryphiswaldense

被引：26

作者：

Moisescu, C. ^{[1
]}

Bonneville, S. ^{[2
]}

Tobler, D. ^{[2
]}

Ardelean, I. ^{[1
]}

Benning, L. G. ^{[2
]}

机构：

[1] Romanian Acad, Inst Biol, Dept Microbiol, Bucharest 060031, Romania

[2] Univ Leeds, Sch Earth & Environm, Earth & Biosphere Inst, Leeds LS2 9JT, W Yorkshire, England

来源：

MINERALOGICAL MAGAZINE | 2008年 / 72卷 / 01期

关键词：

D O I：

10.1180/minmag.2008.072.1.333

中图分类号：

P57 [矿物学];

学科分类号：

070901 ;

摘要：

Results from a study of the chemical composition and micro-structural characteristics of bacterial magnetosomes extracted from the magnetotactic bacterial strain Magnetospirillum gryphiswaldense are presented here. Using high-resolution transmission electron microscopy combined with selected-area electron diffraction and energy dispersive X-ray microanalysis, biogenic magnetite particles isolated from mature cultures were analysed for variations in crystallinity and particle size, as welt as chain character and length. The analysed crystals showed a narrow size range (similar to 14-67 nm) with an average diameter of 46 +/- 6.8 nm, cuboctahedral morphologies and typical Gamma type crystal size distributions. The magnetite particles exhibited a high chemical purity (exclusively Fe3O4) and the majority fall within the single-magnetic-domain range.

引用

页码：333 / 336

页数：4