Pyrocatechol as a surface capping molecule on raffle TiO2 (110)
Author
Summary, in English
A 'cap and dip' method of adsorbing ruthenium di-2,2'-bipyridy1-4,4'-dicarboxylic acid diisocyanate (N3 dye) on a rutile TiO2 (110) surface was investigated using pyrocatechol as a capping molecule. This method involves cleaning the rutile surface in ultra-high vacuum (UHV), depositing pyrocatechol onto the surface to 'cap' the adsorption sites, removing from vacuum, 'dipping' in an N3 dye solution and returning to vacuum. Photoemission measurements following the return of the crystal to vacuum suggest that the pyrocatechol keeps the surface free from contamination on exposure to atmosphere. Photoemission spectra also indicate that the pyrocatechol capping molecules are replaced by the N3 dye in solution and that the N3 dye is adsorbed intact on the nitile TiO2 (110) surface. This technique may allow other large molecules, which are thermally unstable to evaporation in UHV, to be easily deposited onto TiO2 surfaces. (C) 2011 Elsevier B.V. All rights reserved.
Department/s
Publishing year
2012
Language
English
Pages
273-277
Publication/Series
Surface Science
Volume
606
Issue
3-4
Document type
Journal article
Publisher
Elsevier
Topic
- Physical Sciences
- Natural Sciences
Keywords
- Photoemission
- Titanium dioxide
- Single crystal
- Pyrocatechol
- Capping
- N3 dye
Status
Published
ISBN/ISSN/Other
- ISSN: 0039-6028