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Adsorption of Large Organic Molecules on Clean and Hydroxylated Rutile TiO 2 (110) Surfaces
Author(s) -
Godlewski Szymon,
Tekiel Antoni,
Budzioch Janusz,
Gourdon Andre,
PrauznerBechcicki Jakub S.,
Szymonski Marek
Publication year - 2009
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200900606
Subject(s) - adsorption , molecule , scanning tunneling microscope , rutile , chemistry , desorption , resolution (logic) , chemical physics , nanotechnology , materials science , organic chemistry , artificial intelligence , computer science
Behavior of large organic molecules equipped with spacer groups (Violet Landers, VL) on the TiO 2 (110)‐(1×1) surfaces is investigated by means of high‐resolution scanning tunneling microscopy (STM). Two distinct adsorption geometries are observed. We demonstrate that the molecule adsorption morphology can be alternated by well‐controlled STM tip‐induced manipulation. It is used to probe the mobility of molecules and reveals locking in one of the analyzed adsorption sites, thus allow to enhance or reduce the mobility along the [001] direction. Field induced hydrogen desorption is used to perform lateral STM manipulation on a hydroxyl‐free surface, which provides insight into the influence of surface hydroxyl groups on the molecule behavior. The ability to image with submolecular resolution both the central board and the spacer groups of the VL molecule is demonstrated.