O'Dell, L.A. and Savin, S.L.P. and Chadwick, A.V. and Smith, M.E. (2007) Multinuclear MAS NMR investigation of sol-gel and ball-milled nanocrystalline Ga2O3. Applied Magentic Resonance, 32 (4). pp. 527-546. ISSN 0937-9347.
|
PDF
Restricted to Repository staff only |
|
|
| Contact us about this Publication
Download (609Kb)
|
![[img]](http://kar.kent.ac.uk/style/images/fileicons/application_pdf.png) |
| Official URL http://dx.doi.org/10.1007/s00723-007-0036-x |
|
Abstract
Ga-71 magic-angle spinning (MAS) nuclear magnetic resonance (NMR) has been used to characterize the structural evolution of nanocrystalline Ga2O3 samples prepared by sol-gel and ball-milling techniques. Si-29 and Al-27 MAS NMR have also been used to characterize silica and alumina Zener pinning phases. Ga-71 NMR parameters are reported for the alpha- and beta-Ga2O3 phases, and more tentatively for the delta-Ga2O3 phase. By simulating the octahedrally coordinated gallium NMR line of beta-Ga2O3 using Gaussian distributions in chi(Q), the extent of disorder in the Ga2O3 crystallites has been quantified. The ball-milled samples contain much more inherent disorder than the sol-gel samples in the nano-phase, which was observed from simulations of the Ga-71 MAS NMR spectra. The silica pinning phase produced highly crystalline and densely aggregated nanocrystalline Ga2O3, as well as the smallest nanocrystal sizes
| Item Type: | Article |
|---|---|
| Subjects: | Q Science |
| Divisions: | Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group Faculties > Science Technology and Medical Studies > School of Physical Sciences |
| Depositing User: | Alan Chadwick |
| Date Deposited: | 04 Jul 2008 13:55 |
| Last Modified: | 06 Sep 2011 00:11 |
| Resource URI: | http://kar.kent.ac.uk/id/eprint/8535 (The current URI for this page, for reference purposes) |
- Depositors only (login required):
