Jump to main content
Jump to site search

Issue 39, 2010
Previous Article Next Article

Unravelling the atomic structure of cross-linked (1 × 2) TiO2(110)

Author affiliations

Abstract

The cross-linked (1 × 2) reconstruction of TiO2(110) is a frequently observed phase reflecting the surface structure of titania in a significantly reduced state. Here we resolve the atomic scale structure of the cross-linked (1 × 2) phase with dynamic scanning force microscopy operated in the non-contact mode (NC-AFM). From an analysis of the atomic-scale contrast patterns of the titanium and oxygen sub-structures obtained by imaging the surface with AFM tips having different tip apex termination, we infer the hitherto most accurate model of the atomic structure of the cross-linked (1 × 2) phase. Our findings suggest that the reconstruction is based on added rows in [001] direction built up of Ti3O6 units with an uninterrupted central string of oxygen atoms accompanied by a regular sequence of cross-links consisting of linear triples of additional oxygen atoms in between the rows. The new insight obtained from NC-AFM solves previous controversy about the cross-linked TiO2(110) surface structure, since previously proposed models based on cross-links with a lower O content do not appear to be consistent with the atom-resolved data presented here. Instead, our measurements strongly support the Ti3O6 motif to be the structural base of the cross-linked (1 × 2) reconstruction of TiO2(110).

Graphical abstract: Unravelling the atomic structure of cross-linked (1 × 2) TiO2(110)

Back to tab navigation

Publication details

The article was received on 08 Apr 2010, accepted on 01 Jul 2010 and first published on 17 Aug 2010


Article type: Paper
DOI: 10.1039/C0CP00160K
Phys. Chem. Chem. Phys., 2010,12, 12436-12441

  •   Request permissions

    Unravelling the atomic structure of cross-linked (1 × 2) TiO2(110)

    H. H. Pieper, K. Venkataramani, S. Torbrügge, S. Bahr, J. V. Lauritsen, F. Besenbacher, A. Kühnle and M. Reichling, Phys. Chem. Chem. Phys., 2010, 12, 12436
    DOI: 10.1039/C0CP00160K

Search articles by author

Spotlight

Advertisements