artículo
Atomic-Scale Structure of Biogenic Materials by Total X-ray Diffraction: A Study of Bacterial and Fungal MnOx
Fecha
2009Registro en:
10.1021/nn800653a
1936-0851
MEDLINE:19236083
WOS:000263696100028
Autor
Petkov, V.
Ren, Y.
Saratovsky, I.
Pasten, P.
Gurr, S. J.
Hayward, M. A.
Poeppelmeier, K. R.
Gaillard, J. F.
Institución
Resumen
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 MnOx 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.