Size effects in the NMR of SnO2 powders

D P Tunstall, S Patou, R S Liu, Y H Kao

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45 Citations (Scopus)


Using tin dioxide powders obtained from different thermal treatments, we investigated the effects of powder granule size on parameters such as chemical shift, linewidth, and spin-lattice relaxation, via magic-angle spinning (MAS) room temperature nuclear magnetic resonance (NMR) on the Sn-119 nucleus. Mean size, as determined by the Scherrer formula applied to the X-ray diffraction data, varied from 4 to 32 nm. We compared the properties of the Sn-119 power samples with normal 10 mu m cassiterite SnO2 bulk properties(.) Linewidth showed a general broadening as size decreased, but there was evidence in the anisotropy of the chemical shift, and in the spin-lattice relaxation, of a size-dependence effect. The largest modification in bulk properties occurred at about 8 nm. We discuss the correlation between anisotropy and spin-lattice relaxation in relation to the change of vibrational modes, as observed by Raman spectroscopy, as particle size decreases. (C) 2000 Elsevier Science Ltd.

Original languageEnglish
Pages (from-to)1513-1520
Number of pages8
JournalMaterials Research Bulletin
Publication statusPublished - Jul 1999


  • nanostructures
  • nuclear magnetic resonance (NMR)
  • Raman spectroscopy
  • X-ray diffraction
  • surface properties
  • TIN


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