AbstractsPhysics

Computational Study of the Diffusion of Dehalogenated Molecules on a Ag(111) Surface

by Mohammed Rashed




Institution: Linköping University
Department:
Year: 2014
Keywords: Dffusion; Engineering and Technology; Nano Technology; Teknik och teknologier; Nanoteknik; Fysik; Physics
Record ID: 1355479
Full text PDF: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-116809


Abstract

In this diploma work the diffusion of dehalogenated organic molecules on a metal surface was studied. More specifically the benzene tri-radical (BTR) on Ag(111) surfaces has been computationally studied using density functional theory calculations. The diffusion of organic molecules on metal surfaces is one of the key parameters in the on-surface synthesis of covalent materials. Transition-states of different diffusion paths were calculated with the nudged elastic band (NEB), climbing image nudged-elastic band (CI-NEB) and Dimer methods. During the diffusion process, bonds are subsequently broken and forming between the molecule and the surface. The diffusion mechanisms were carried out between different adsorption sites, and the diffusion type with lowest barrier was identified.