Nano Structures Formed by Molecular Chlorine Interaction with Noble Metal Surfaces

Download or read book Nano Structures Formed by Molecular Chlorine Interaction with Noble Metal Surfaces written by Vladimir Cerchez and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work is related to the systematic study of chlorine adsorption mechanism on the metal's surfaces Au(111), Ag(111) and Cu(111). We had used for this study the interaction of chlorine gas with metal surface in ultra-high vacuum conditions. Elaborated systems were characterized from the structural point of view by low-energy electron diffraction and low-temperature scanning tunneling microscopy (5 K). Local electronic properties were probed by scanning tunneling spectroscopy. The first part of the work is devoted to the surface's structural modifications induced by chlorine adsorption from sub-monolayer regime to saturation, which corresponds to the appearance of metal halide precursors. From numerous experimental results we were able to describe in details the mechanism of gas/surface interaction and to propose atomic structural models that remained unresolved up to now. The proposed models were validated by density functional theory calculations. The second part of the thesis is devoted to the study of original electronic properties of the superstructure of quantum wells formed by self-organization of chlorine atoms on (111) surface of gold. We had studied the quantum resonances that appeared due to the confinement of surface electronic states in the pores of few nanometers in diameter. The eigenstates were characterized as a function of the quantum well?s shape and size. This study was completed by numerical modeling of spectroscopic properties of nano-pores in the "particle-in-a-box" limit.