Wet chemically prepared rutile TiO2(110) and TiO2(011): Substrate preparation for surface studies under non-UHV conditions

SURFACE SCIENCE

卷:630

Article

Ahmed, M. H. M.¹  Lydiatt, F. P.¹  Chekulaev, D.¹  Wincott, P. L.^2,3  Vaughan, D. J.^2,3  Jang, J. H.⁴  Baldelli, S.⁴  Thomas, A. G.^5,6  Walters, W. S.⁷  Lindsay, R.¹ 

[1] Univ Manchester, Sch Mat, Ctr Corros & Protect, Manchester M13 9PL, Lancs, England

[2] Univ Manchester, Williamson Res Ctr Mol Environm Sci, Manchester M13 9PL, Lancs, England

[3] Univ Manchester, Sch Earth Atmospher & Environm Sci, Manchester M13 9PL, Lancs, England

[4] Univ Houston, Dept Chem, Houston, TX 77204 USA

[5] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England

[6] Univ Manchester, Photon Sci Inst, Manchester M13 9PL, Lancs, England

[7] Natl Nucl Lab, Didcot OX11 0QT, Oxon, England

关键词: Metal oxide;    Low miller index single crystal surface;    Wet chemical preparation;    Surface structure;    Surface composition;   

DOI  :  10.1016/j.susc.2014.06.020

来源: Elsevier

【 摘 要 】

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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