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Normalized x-ray absorption coefficient from nanorods as a function of incident x-ray energy at the edge with the geometry of the axis aligned, (a) parallel and (b) perpendicular, to the electric field vector of the x rays.
XAFS from powder (top) and from the aligned nanorods with diameters of 13 and for (2nd and 3rd) and (4th and 5th), as a function of the photoelectron wave vector .
Magnitude of Fourier transformed XAFS, from (a) powder and nanorods with an average diameter of for (b) and (c) , as a function of the distance from a atom. For the Fourier transformation, a Hanning window with a windowsill width of was used. Data in the range of were used for the fit.
Coordination number , bond length and Debye–Waller factor of bulk and nanorods were determined with simultaneous fits of orientation-dependent XAFS data measured at the edge. of 0.95 was determined from the fit of the powder data and fixed for the fits of the nanorod data. For the model calculations, a fully occupied wurtzite structure (space group: ) with , and the crystalline symmetry of was used.
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