Type

Journal Article

Authors

Clivia M. Sotomayor Torres
Guillermo Gonzalez
Eglantina Benavente
María A. Santa-Ana
Simon B. Newcomb
Vladimir Lavayen
Colm O'Dwyer

Subjects

Chemistry

Topics
phonons infrared spectra nanotubes organic compounds raman spectra nanocomposites surfactants intercalation compounds vanadium compounds

Vanadate conformation variations in vanadium pentoxide nanostructures (2007)

Abstract We report the comparative structural-vibrational study of nanostructures of nanourchins, nanotubes, and nanorods of vanadium oxide. The tube walls comprise layers of vanadium oxide with the organic surfactant intercalated between atomic layers. Both Raman scattering and infrared spectroscopies showed that the structure of nanourchins, nanotubes, and nanorods of vanadium oxide nanocomposite are strongly dependent on the valency of the vanadium, its associated interactions with the organic surfactant template, and on the packing mechanism and arrangement of the surfactant between vanadate layers. Accurate assignment of the vibrational modes to the V-O coordinations has allowed their comparative classification and relation to atomic layer structure. Although all structures are formed from the same precursor, differences in vanadate conformations due to the hydrothermal treatment and surfactant type result in variable degrees of crystalline order in the final nanostructure. The nanotube-containing nanourchins contain vanadate layers in the nanotubes that are in a distorted γ- V5+ conformation, whereas the the nanorods, by comparison, show evidence for V5+ and V4+ species-containing ordered VOx lamina.
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Full list of authors on original publication

Clivia M. Sotomayor Torres, Guillermo Gonzalez, Eglantina Benavente, María A. Santa-Ana, Simon B. Newcomb, Vladimir Lavayen, Colm O'Dwyer

Experts in our system

1
Colm O'Dwyer
University College Cork
Total Publications: 121