STRUCTURAL ASPECTS OF TETRAMETHYLTHIOUREA ADSORPTION ON AU(111) ELECTRODES INVESTIGATED BY IN-SITU SCANNING-TUNNELING-MICROSCOPY

Authors
BUNGE E NICHOLS RJ BAUMGARTEL H MEYER H
Citation
E. Bunge et al., STRUCTURAL ASPECTS OF TETRAMETHYLTHIOUREA ADSORPTION ON AU(111) ELECTRODES INVESTIGATED BY IN-SITU SCANNING-TUNNELING-MICROSCOPY, Berichte der Bunsengesellschaft fur Physikalische Chemie, 99(10), 1995, pp. 1243-1246
Citations number
18
Categorie Soggetti
Chemistry Physical
Journal title
Berichte der Bunsengesellschaft fur Physikalische Chemie
ISSN journal
00059021 → ACNP
Volume
99
Issue
10
Year of publication
1995
Pages
1243 - 1246
Database
ISI
SICI code
0005-9021(1995)99:10<1243:SAOTAO>2.0.ZU;2-O
Abstract
We have examined tetramethylthiourea (TMTU) adsorption on Au(lll) with capacitance measurements and in situ scanning tunnelling microscopy ( STM). Capacitance measurements of the TMTU-containing solution indicat e that the organic molecule is adsorbed over a wide potential range. H igh resolution STM images at +20 mV are totally different to those in the absence of TMTU and point to an ordered structure of the organic a dsorbate. Three distinctive bright spots are seen in the STM images. A model has been developed with the molecules lying near to horizontal on the surface, forming a (3 x 3) adlayer.