(2n × 1) Reconstructions of TiO2(011) Revealed by Noncontact Atomic Force Microscopy and Scanning Tunneling Microscopy

CL Pang, A Yurtsever, J Onoda… - The Journal of …, 2014 - ACS Publications
The Journal of Physical Chemistry C, 2014ACS Publications
We have used noncontact atomic force microscopy (NC-AFM) and scanning tunneling
microscopy (STM) to study the rutile TiO2 (011) surface. A series of (2 n× 1) reconstructions
were observed, including two types of (4× 1) reconstruction. High-resolution NC-AFM and
STM images indicate that the (4× 1)-α phase has the same structural elements as the more
widely reported (2× 1) reconstruction. An array of analogous higher-order (2 n× 1)
reconstructions were also observed where n= 3–5. On the other hand, the (4× 1)-β …
We have used noncontact atomic force microscopy (NC-AFM) and scanning tunneling microscopy (STM) to study the rutile TiO2(011) surface. A series of (2n × 1) reconstructions were observed, including two types of (4 × 1) reconstruction. High-resolution NC-AFM and STM images indicate that the (4 × 1)-α phase has the same structural elements as the more widely reported (2 × 1) reconstruction. An array of analogous higher-order (2n × 1) reconstructions were also observed where n = 3–5. On the other hand, the (4 × 1)-β reconstruction seems to be a unique structure without higher-order analogues. A model is proposed for this structure that is also based on the (2 × 1) reconstruction but with additional microfacets of {111} character.
ACS Publications
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