[Zurück]

J. Martínèz, J. Valenzuela, C. Hernandez Tamargo, R. Cao-Milán, J.A. Herrera, J.A. Díaz, M.H. Farías, H. Mikosch, M. Hernández:
"Study of sulfur adlayers on Au(111) from basic hydrolysis of piperazine bis(dithiocarbamate) sodium salt";
Applied Surface Science, 345 (2015), S. 394 - 399.

Sulfur adlayers on Au(111) were obtained after the interaction of a gold substrate with an alkaline solution of piperazine bis(dithiocarbamate) sodium salt. Characterization of the sulfur modified gold surface was performed by means of X-Ray Photoelectron Spectroscopy (XPS), Scanning Tunneling Microscopy (STM) and Density Functional Theory (DFT) calculations. XPS signals indicated the presence of S-Au bonds, monomeric and polymeric sulfur, and absence of nitrogen and sodium. Images from STM showed the formation of quasi-rectangular octomers in coexistence with another phase. A DFT model using the arrangement of sulfur dimers on the Au(111) surface effectively reproduced the experimental STM images.

Sulfur adlayers; Dithiocarbamate; Scanning tunneling microscopy; X-ray photoelectron spectroscopy, Density functional theory

http://dx.doi.org/10.1016/j.apsusc.2015.03.163