Reference : Comparative study of decyl thiocyanate and decanethiol self-assembled monolayers on g...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/26610
Comparative study of decyl thiocyanate and decanethiol self-assembled monolayers on gold substrates
English
Dreesen, Laurent mailto [Université de Liège - ULiège > Département de physique > Biophotonique >]
Volcke, C. [ > > ]
Sartenaer, Y. [ > > ]
Peremans, A. [ > > ]
Thiry, P. A. [ > > ]
Humbert, C. [ > > ]
Grugier, J. [ > > ]
Marchand-Brynaert, J. [ > > ]
2006
Surface Science
Elsevier Science
600
4052-4057
Yes (verified by ORBi)
International
0039-6028
Amsterdam
The Netherlands
[en] In a recent paper Ciszek et al. [J.W. Ciszek, M.P. Stewart, J.M. Tour, J. Am. Chem. Soc. 126 2004) 13172] showed that organic thiocyanates may be an interesting alternative to the use of thiols for thiolate assemblies. We use scanning tunnelling microscopy (STM), infrared reflection absorption and sum-frequency generation spectroscopies (IRRAS and SFG) in order to study the adsorption properties of decyl thiocyanates (DTCN) and compare them to the decanethiol (DT) ones. Firstly, IRRAS measurements show that DTCN molecules form self-assembled monolayers (SAMs) on gold via a thiolate link with the metallic substrate. Secondly, the DTCN SAM on gold is less ordered than the DT one as highlighted by SFG spectroscopy. Indeed, the intensities of the methyl vibration modes vanish while the methylene ones increase when DTCN molecules are adsorbed on the substrate instead of DT. We explain the differences in SAMs quality on the basis of STM measurements which reveal differences in molecular order and packing.
Researchers ; Professionals
http://hdl.handle.net/2268/26610
10.1016/j.susc.2006.01.122

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