2007 NSTI Nanotechnology Conference and Trade Show - Nanotech 2007 - 10th Annual

Scanning Tunneling Microscopy Images of Au Adsorbed on GaAs(111)B surface

H. Yi, P. Kratzer, E. Hilner and A. Mikkelsen

STM, simulation, adsorption, DFT

We have studied the GaAs(111)B surface with Au deposited either homogeneously or as nanoparticles, and found the presence of Au in either form to give rise to a sqrt(3} x sqrt(3} Au-induced surface reconstruction. In the structural model supported by our DFT calculations for an Au coverage of 1/3 ML, Au atoms are adsorbed at every third threefold hollow hcp site of the Ga lattice. The proposed structural model is in agreement with experimental data from low-energy electron diffraction and STM.

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Nanotech 2007 Conference Program Abstract


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