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Pyrocatechol as a surface capping molecule on raffle TiO2 (110)

Författare:
Publiceringsår: 2012
Språk: Engelska
Sidor: 273-277
Publikation/Tidskrift/Serie: Surface Science
Volym: 606
Nummer: 3-4
Dokumenttyp: Artikel
Förlag: Elsevier Science BV

Sammanfattning

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.

Disputation

Nyckelord

  • Physics and Astronomy
  • Photoemission
  • Titanium dioxide
  • Single crystal
  • Pyrocatechol
  • Capping
  • N3 dye

Övriga

Published
Yes
  • ISSN: 0039-6028

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