Atomic-scale structure of biogenic materials by total X-ray diffraction: a study of bacterial and fungal MnOx.
Atomic-scale structure of biogenic materials by total X-ray diffraction: a study of bacterial and fungal MnOx.
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DOI：
10.1021/nn800653a
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发表时间：
2009-01
期刊：
影响因子：
17.1
通讯作者：
V. Petkov;Yang Ren;Ian Saratovsky;Pablo A. Pastén;Sarah J. Gurr;Michael A. Hayward;K. Poeppelmeier;Jean-François Gaillard
中科院分区：
文献类型：
--
作者：
V. Petkov;Yang Ren;Ian Saratovsky;Pablo A. Pastén;Sarah J. Gurr;Michael A. Hayward;K. Poeppelmeier;Jean-François Gaillard
生物源材料由微生物产生，通常以纳米相状态存在。因此，它们在结构上难以表征。在这份报告中，我们演示了如何使用高能X射线衍射和原子对分布函数分析来确定细菌和真菌产生的MnO（x）的原子尺度结构。这些结构是明确定义的，周期性的，和物种特异性的，由Mn-O（6）八面体分别形成水钠锰矿型层和钙钛矿型隧道。生物源材料固有的结构多样性可能为实际应用提供机会。
Biogenic materials are produced by microorganisms and are typically found in a nanophase state. As such, they are difficult to characterize structurally. In this report, we demonstrate how high-energy X-ray diffraction and atomic pair distribution function analysis can be used to determine the atomic-scale structures of MnO(x) produced by bacteria and fungi. These structures are well-defined, periodic, and species-specific, built of Mn-O(6) octahedra forming birnessite-type layers and todorokite-type tunnels, respectively. The inherent structural diversity of biogenic material may offer opportunities for practical applications.