STUDY OF THE ADSORPTION AND DESORPTION OF SELENIUM ON AU(111) WITH ION SCATTERING, LOW ENERGY ELECTRON DIFFRACTION AND ELECTRON SPECTROSCOPIES

E. TOSI; L.SALAZAR ALARCON; M.L. MARTIARENA; E.A. SANCHEZ; O. GRIZZI; G. ZAMPIERI

Wirrina Cove

Workshop; 20 International Workshop on Inelastic Ion Surface Collisions; 2014

The growing interest in nanoscale devices has promoted the study of Self Assembled Monolayers (SAMs) of organic molecules. In particular the choice of dichalcogens (HSR- SH, HSe-R-HSe, etc.) to form the SAMs is motivated by the ease of adsorption of these molecules on noble metals like Ag, Au, Cu. Due to the interest in SAMs of selenols as an alternative to SAMs formed by thiols, in this work we study the adsorption of atomic Se on Au(111) with the aim of determining the nature of the link with the metal substrate, in particular the adsorption kinetics, the formation of ordered phases and the stability of the Se layer with temperature. Se was adsorbed in ultra-high vacuum conditions and the adlayers were Characterized using XPS, AES, LEED and TOF-DRS.