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Wet chemically prepared rutile TiO2(110) and TiO2(011): Substrate preparation for surface studies under non-UHV conditions
Ahmed, M H M; Lydiatt, F P; Chekulaev, D; Wincott, P L; Vaughan, D J; Jang, J H; Baldelli, S; Thomas, A G; Walters, W S; Lindsay, R
Surface Science. 2014;630:41-45.
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Abstract
A procedure for wet chemical preparation of TiO2 single crystal surfaces is detailed. The potential of this procedure is demonstrated through application to rutile-TiO2(110) and rutile-TiO2(011) substrates. Characterisation with atomic force microscopy, low energy electron diffraction, auger electron spectroscopy, and vibrational sum frequency spectroscopy indicates that flat, well-ordered, carbon-free surfaces can be generated. Notably, in contrast to the (2 x 1) low energy electron diffraction pattern observed for TiO2(011) prepared in ultra-high vacuum, wet chemical preparation results in a (4 x 1) unit cell; wet chemically prepared TiO2(110) displays an unreconstructed (1 x 1) surface. (C) 2014 Elsevier B.V. All rights reserved.
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