Molecules on the Au(111) Surface

Chapter
First Online:
Part of the Springer Theses book series (Springer Theses)

Abstract

The previous chapter provided some evidence that calculations performed in the gas phase can be useful if the molecule-surface interaction has a relatively small corrugation across the surface. However, the presence of the surface can be important in giving a preferential growth direction or stabilising structures which are not the most stable in the gas phase. More complex structures may be possible, for which the surface may play some role, e.g. domain walls to relieve the strain between different domains. Therefore, the calculation of the binding energies of the molecules with the surface and the energy barriers for their diffusion are of crucial importance. In this chapter, we shall treat accurately these issues using a different kind of approach in order to have a complete characterisation of the phenomenon. In the first part of the chapter, we shall present our results regarding the adsorption and diffusion of molecules on the Au(111) surface using the standard DFT approach. Later on we shall compare these results with the ones obtained with the vdW-DF method which accounts for dispersion interaction. We shall present the results in the same order as in the previous chapter starting from the melamine and then moving towards the more complicated PTCDA, PTCDI, NTCDI and NTCDA molecules.

Keywords

Adsorption Energy Lattice Vector Gold Surface Dispersion Interaction Preferential Adsorption Site 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.University of Central Lancashire PrestonLancashireUK

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