http://www.cnr.it/ontology/cnr/individuo/prodotto/ID48537
Stability of TiO2 Polymorphs: Exploring the Extreme Frontier of the Nanoscale (Articolo in rivista)
- Type
- Label
- Stability of TiO2 Polymorphs: Exploring the Extreme Frontier of the Nanoscale (Articolo in rivista) (literal)
- Anno
- 2010-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1002/cphc.200900872 (literal)
- Alternative label
Vittadini, A.; Sedona, F.; Agnoli, S.; Artiglia, L.; Casarin, M.; Rizzi, G.A.; Sambi, M.; Granozzi, G. (2010)
Stability of TiO2 Polymorphs: Exploring the Extreme Frontier of the Nanoscale
in ChemPhysChem (Print)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Vittadini, A.; Sedona, F.; Agnoli, S.; Artiglia, L.; Casarin, M.; Rizzi, G.A.; Sambi, M.; Granozzi, G. (literal)
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- Rivista
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- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- [Sedona, Francesco; Agnoli, Stefano; Artiglia, Luca; Casarin, Maurizio; Rizzi, Gian Andrea; Sambi, Mauro; Granozzi, Gaetano] Univ Padua, Dipartimento Sci Chim, I-35131 Padua, Italy.
[Sedona, Francesco; Agnoli, Stefano; Artiglia, Luca; Casarin, Maurizio; Rizzi, Gian Andrea; Sambi, Mauro; Granozzi, Gaetano] Univ Padua, INSTM Res Unit, I-35131 Padua, Italy.
[Vittadini, Andrea] Univ Padua, Ist Sci Tecnol Mol, CNR ISTM Village, I-35131 Padua, Italy.
[Vittadini, Andrea] Univ Padua, Dipartimento Sci Chim, I-35131 Padua, Italy. (literal)
- Titolo
- Stability of TiO2 Polymorphs: Exploring the Extreme Frontier of the Nanoscale (literal)
- Abstract
- The structure of two ordered stoichiometric TiO2 nanophases supported
on Pt(111) and (1x2)-Pt(110) substrates, prepared by reactive
evaporation of Ti in a high-oxygen background, is compared by
discussing experimental data (i.e. low-energy electron diffraction,
scanning tunneling microscopy) and density functional theory
calculations. Two rectangular phases, called rect-TiO2 and rect-TiO2
were obtained on both the hexagonal Pt(111) and the rectangular
(1x2)-Pt(110) substrates, generally suggesting that they are weakly
interacting with the substrates. The rect-TiO2 phase is actually
confined to a TiO2 double layer, while the rect-TiO2 can extend up to a
thickness of several layers and is obtained when higher Ti doses are
evaporated. While the rect-TiO2 is best described as a
thickness-limited lepidocrocite-like nanosheet, growing as a
single-domain-commensurate (14x4) phase on (1x2)-Pt(110) and as a
six-domains-incommensurate phase on Pt(111), the thicker rect-TiO2
phase can be best described as a TiO2(B) supported nanolayer (NL). This
represents the first example of the TiO2(B) phase in the form of a
supported NL, whose properties are still largely unexplored. The
important point is that, because of the weak interaction between the
oxide NLs and the Pt surfaces, the substrate does not play a role in
stabilizing the 2D nanostructures. Rather, it acts as a sort of lab
bench where subnanosized titania crystallites self-assemble, so that
the final NLs are representative of 2D confined titania at the bottom
of the nanoscale. (literal)
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