Title of article :
A grazing incidence surface X-ray absorption fine structure (GIXAFS) study of alkanethiols adsorbed on Au, Ag, and Cu
Author/Authors :
Floriano، نويسنده , , Pierre N. and Schlieben، نويسنده , , Olaf and Doomes، نويسنده , , Edward E. and Klein، نويسنده , , Ingo and Janssen، نويسنده , , J. and Hormes، نويسنده , , Josef and Poliakoff، نويسنده , , E.D. and McCarley، نويسنده , , Robin L.، نويسنده ,
Abstract :
Self-assembled monolayers of n-alkanethiols, CH3–(CH2)x–SH, on Au, Ag, and Cu have been studied with GIXAFS at the sulfur K-edge. For both pentanethiol and decanethiol monolayers on Ag and Cu, the three-fold hollow site is found to be the most probable sulfur binding site. However, observations for octadecanethiol indicate that the three-fold hollow site is not the exclusive binding site. In addition, the possible existence of disulfide bonds on the metal surface (adsorbed dialkyldisulfides) is not supported by the data. Preliminary results from monolayers on Au are also reported.
