Modifying behaviour of Cu on the orientation of formate on ZnO(0001̄)-O

A. Gutiérrez-Sosa, T. M. Evans, A. P. Woodhead, R. Lindsay, C. A. Muryn, G. Thornton, J. Yoshihara, S. C. Parker, C. T. Campbell, R. J. Oldman

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The orientation of formic acid (HCOOH) on ZnO(0001̄)-O and the effect of co-adsorbed Cu have been studied using polarisation dependent C K-edge near edge X-ray absorption fine structure. Formate created by exposure of the substrate to 20 L of HCOOH at 110 K and heating to 340 K is tilted by 55 ± 5° with respect to the surface normal. Pre-adsorbing Cu to create 2D islands covering about half the substrate results in an apparent tilt angle of 32 ± 5° with respect to the surface normal. Since this is close to the magic angle, the apparent tilt could arise from a random orientation of the molecule. The origin of the apparent tilt is likely to be buckling of the Cu(110)-like islands.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalSurface Science
Issue number1
Publication statusPublished - 10 Apr 2001


  • Carboxylic acid
  • Chemisorption
  • Copper
  • Low index single crystal surfaces
  • Near edge extended X-ray absorption fine structure (NEXAFS)
  • Zinc oxide


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