Neutron and Raman scattering studies of surface adsorbed molecular vibrations and bulk phonons in ZrO{sub 2} nanoparticles
- Nagoya Inst. of Tech. (Japan)
- Argonne National Lab., IL (United States)
Inelastic neutron scattering was used to study the phonon densities of states of zirconia nanoparticles, the O-H stretch vibrations of physisorbed water molecules, and chemisorbed hydroxyl groups on the surface. Raman scattering was also used to measure the zone-center phonon modes. The observed distinct phonon frequencies and band widths at 10-120 meV reflect the different crystalline symmetries and compositional fluctuations in the small grain and interfacial regions of monoclinic ZrO{sub 2}, tetragonal or mixed cubic and tetragonal rare-earth-modified zirconia. The dynamics of water and hydroxyl groups on varying local structures of these zirconias result in the different frequencies of the O-H stretch vibrations at 400-600 meV.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 449436
- Report Number(s):
- ANL/IPNS/CP-90685; CONF-9611133-2; ON: DE97001996
- Resource Relation:
- Conference: International symposium on surface nano-control of environmental catalysts and related materials, Tokyo (Japan), 25-27 Nov 1996; Other Information: PBD: [1996]
- Country of Publication:
- United States
- Language:
- English
Similar Records
Crystal phases, defects, and dynamics of adsorbed hyroxyl groups and water in pure and lanthanide-modified zirconia: A neutron-scattering study
Crystal structure, short-range oxygen defects, and water adsorption in La- and Nd-modified ZrO{sub 2}