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Adsorption structure of glycine on TiO2(1 1 0): a photoelectron diffraction determination
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Lerotholi, T. J., Kröger, E. A., Knight, M. J., Unterberger, W. (Werner), Hogan, K. A., Jackson, D. C., Lamont, C. L. A. and Woodruff, D. P. (2009) Adsorption structure of glycine on TiO2(1 1 0): a photoelectron diffraction determination. Surface Science, Vol.603 (No.15). pp. 2305-2311. doi:10.1016/j.susc.2009.05.009 ISSN 0039-6028.
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Official URL: http://dx.doi.org/10.1016/j.susc.2009.05.009
Abstract
High-resolution core-level photoemission and scanned-energy mode photoelectron diffraction (PhD) of the O 1s and N 1s states have been used to investigate the interaction of glycine with the rutile TiO2(1 1 0) surface. Whilst there is clear evidence for the presence of the zwitterion View the MathML sourceCH2COO− with multilayer deposition, at low coverage only the deprotonated glycinate species, NH2CH2COO is present. Multiple-scattering simulations of the O 1s PhD data show the glycinate is bonded to the surface through the two carboxylate O atoms which occupy near-atop sites above the five-fold-coordinated surface Ti atoms, with a Ti–O bondlength of 2.12 ± 0.06 Å. Atomic hydrogen arising from the deprotonation is coadsorbed to form hydroxyl species at the bridging oxygen sites with an associated Ti–O bondlength of 2.01 ± 0.03 Å. Absence of any significant PhD modulations of the N 1s emission is consistent with the amino N atom not being involved in the surface bonding, unlike the case of glycinate on Cu(1 1 0) and Cu(1 0 0).
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Adsorption -- Research, Surfaces (Physics) -- Research, Photoelectron spectroscopy, Chemisorption -- Research, Titanium dioxide films, Glycine -- Research, Amino acid neurotransmitters | ||||
Journal or Publication Title: | Surface Science | ||||
Publisher: | Elsevier BV | ||||
ISSN: | 0039-6028 | ||||
Official Date: | 1 August 2009 | ||||
Dates: |
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Volume: | Vol.603 | ||||
Number: | No.15 | ||||
Page Range: | pp. 2305-2311 | ||||
DOI: | 10.1016/j.susc.2009.05.009 | ||||
Status: | Peer Reviewed | ||||
Access rights to Published version: | Open Access (Creative Commons) |
Data sourced from Thomson Reuters' Web of Knowledge
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