Atomic-scale structure of biogenic materials by total X-ray diffraction: a study of bacterial and fungal MnOx.

نویسندگان

  • V Petkov
  • Y Ren
  • I Saratovsky
  • P Pastén
  • S J Gurr
  • M A Hayward
  • K R Poeppelmeier
  • J-F Gaillard
چکیده

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.

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عنوان ژورنال:
  • ACS nano

دوره 3 2  شماره 

صفحات  -

تاریخ انتشار 2009