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Structural determination of titanium-oxide nanoparticles by x-ray absorption spectroscopy

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12 Author(s)
Wu, Z.Y. ; Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918, 100039 Beijing, China ; Zhang, J. ; Ibrahim, K. ; Xian, D.C.
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To understand and improve the applications of titanium-oxide nanoparticles, it is extremely important to perform a detailed investigation of the surface and the interior structural properties of nanocrystalline materials, such as rutile and anatase with diameter of few nanometers. Here, x-ray absorption spectroscopy has been used to identify the local Ti environment and characterize the related electronic structure. We combine experimental results at the Ti K edge in both bulk and nanocrystal samples to determine the lattice distortion via the characteristic pre-edge features and the variation in the multiple-scattering region of the x-ray absorption near-edge structure spectra. The correlation between peak intensities and surface-to-volume ratio of nanoparticles is also discussed. © 2002 American Institute of Physics.

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Applied Physics Letters  (Volume:80 ,  Issue: 16 )