Amorphous structure of iron oxide of bacterial origin
Amorphous structure of iron oxide of bacterial origin
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DOI：
10.1016/j.matchemphys.2012.10.002
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发表时间：
2012-12-14
影响因子：
4.6
通讯作者：
Takada, Jun
中科院分区：
文献类型：
--
作者：
Hashimoto, Hideki;Fujii, Tatsuo;Takada, Jun
在自然界中，有各种各样的铁氧化物由水栖细菌群产生，称为“铁氧化细菌”。这些铁氧化物主要从生物学和地球化学的角度进行了研究。如今，人们尝试在几种应用中使用这种铁氧化物作为新型功能材料。然而，它们的数量结构特征仍不清楚。我们研究了铁氧化细菌，赭色纤发菌，使用高能X射线衍射和反向蒙特卡罗模拟相结合形成的无定形纳米粒子组成的微管形式的氧化铁的结构。我们发现，它的结构由一个框架的角和边缘共享扭曲的FeO6八面体单元，而SiO4四面体单元是孤立的框架。结果揭示了细菌来源的氧化铁的原子排列，这对于研究其作为功能材料的潜力至关重要。(C)2012 Elsevier B.V.保留所有权利。
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. (C) 2012 Elsevier B.V. All rights reserved.