Increase of the mean inner Coulomb potential in Au clusters induced by surface tension and its implication for electron scattering

Details Increase of the mean inner Coulomb potential in Au clusters induced by surface tension and its implication for electron scattering Increase of the mean inner Coulomb potential in Au clusters induced by surface tension and its implication for electron scattering

2007-05-08

arxiv.org/abs/0705.1065v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.76.235411

Electron holography in a transmission electron microscope was applied to measure the phase shift induced by Au clusters as a function of the cluster size. Large phase shifts Df observed for small Au clusters cannot be described by the well-known equation Df=C_E V_0 t (C_E: interaction constant, V_0: mean inner Coulomb potential (MIP) of bulk gold, t: cluster thickness). The rapid increase of the Au MIP with decreasing cluster size derived from Df, can be explained by the compressive strain of surface atoms in the cluster.

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