Lateral distribution of N3 dye molecules on TiO2 (110) surface.
J PHOTOCH PHOTOBIO A
185 - 190.
The lateral distribution of Ru(4,4'-dicarboxy-2,2'-bipyridine)(2)(NCS)(2) (N3) dye molecules on a titanium dioxide (TiO2) surface was examined by using a Scanning tunneling microscope. Pivalate ((CH3)(3)CCOO-)-covered rutile TiO2 (110) Surfaces were immersed in acetonitrile containing the N3 dye. The N3 molecules which replaced the pivalates were observed as protrusions embedded in the pivalate monolayer. A two-dimensional radial distribution function indicated that the adsorbed N3 molecules tended to be aggregated. Trapping of an N3 molecule in the solution by a preadsorbed N3 molecule was proposed as a driving force for the aggregation. The hydrogen bonds between the carboxyl groups of two N3 molecules contribute to the trapping. (C) 2008 Elsevier B.V. All rights reserved.
|Title:||Lateral distribution of N3 dye molecules on TiO2 (110) surface|
|Keywords:||N3, Titanium dioxide, Scanning tunneling microscopy, Aggregation, Autocorrelation analysis, SENSITIZED SOLAR-CELLS, SCANNING-TUNNELING-MICROSCOPY, NANOCRYSTALLINE TIO2, DEOXYCHOLIC-ACID, COUMARIN-DYE, TIO2(110), ADSORPTION, PHOTOSENSITIZERS, ELECTRICITY, ADSORBATES|
|UCL classification:||UCL > School of BEAMS
UCL > School of BEAMS > Faculty of Maths and Physical Sciences
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