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Orientation-dependent x-ray absorption fine structure of nanorods
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Image of FIG. 1.
FIG. 1.

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.

Image of FIG. 2.
FIG. 2.

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 .

Image of FIG. 3.
FIG. 3.

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.


Generic image for table
Table I.

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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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Orientation-dependent x-ray absorption fine structure of ZnO nanorods