Dynamics of water confined on the surface of titania and cassiterite nanoparticles

Nancy L. Ross, Elinor C. Spencer, Andrey A. Levchenko, Alexander I. Kolesnikov, Douglas L. Abernathy, Juliana Boerio-Goates, Brian F. Woodfield, Alexandra Navrotsky, Guangshe Li, Wei Wang, David J. Wesolowski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

We present low-temperature inelastic neutron scattering spectra collected on two metal oxide nanoparticle systems, isostructural TiO 2 rutile and SnO 2 cassiterite, between 0-550 meV. Data were collected on samples with varying levels of water coverage, and in the case of SnO 2, particles of different sizes. This study provides a comprehensive understanding of the structure and dynamics of the water confined on the surface of these particles. The translational movement of water confined on the surface of these nanoparticles is suppressed relative to that in ice-lh and water molecules on the surface of rutile nanoparticles are more strongly restrained that molecules residing on the surface of cassiterite nanoparticles. The INS spectra also indicate that the hydrogen bond network within the hydration layers on rutile is more perturbed than for water on cassiterite. This result is indicative of stronger water-surface interactions between water on the rutile nanoparticles than for water confined on the surface of cassiterite nanoparticles. These differences are consistent with the recently reported differences in the surface energy of these two nanoparticle systems.

Original languageEnglish (US)
Title of host publicationTitanium Dioxide Nanomaterials
Pages47-56
Number of pages10
DOIs
StatePublished - 2012
Externally publishedYes
Event2011 MRS Spring Meeting - San Francisco, CA, United States
Duration: Apr 25 2011Apr 29 2011

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1352
ISSN (Print)0272-9172

Other

Other2011 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period4/25/114/29/11

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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