Neutron Scattering as a Probe of Small-Particle Dynamics in Hydroxylated Amorphous Silica
- 16 June 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 44 (24), 1593-1597
- https://doi.org/10.1103/physrevlett.44.1593
Abstract
Incoherent, inelastic scattering of neutrons by hydrogen in surface hydroxyl groups has been used to probe the dynamics of 60-70-Å-diameter spheres of amorphous silica. The high-temperature spectra indicate a pronounced "small-particle" enhancement of low-frequency vibrational modes as predicted by theory. At low temperatures, the scattering changes in character and shows evidence of hindered rotational transitions.Keywords
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