In this work, a methodology, based on a self-organization process, to form goldnanoclusters on the 6H-SiC surface, is illustrated. By scanning electron microscopy and atomicforce microscopy the gold self-organization induced by annealing processes was studied andmodelled by classical limited surface diffusion ripening theories. These studies allowed us tofabricate Au nanoclusres/SiC nanostructured materials with tunable structural properties.The local electrical properties of such a nanostructured material were probed, by conductive atomicforce microscopy collecting high statistics of I-V curves. The main observed result was theSchottky barrier height (SBH) dependence on the cluster size. This behaviour is interpretedconsidering the physics of few electron quantum dots merged with the ballistic transport. A quitesatisfying agreement between the theoretical forecast behaviour and the experimental data has beenfound.

Clustering of gold on 6H-SiC and local nanoscale electrical properties

RUFFINO, FRANCESCO
;
GRIMALDI, Maria Grazia
2008

Abstract

In this work, a methodology, based on a self-organization process, to form goldnanoclusters on the 6H-SiC surface, is illustrated. By scanning electron microscopy and atomicforce microscopy the gold self-organization induced by annealing processes was studied andmodelled by classical limited surface diffusion ripening theories. These studies allowed us tofabricate Au nanoclusres/SiC nanostructured materials with tunable structural properties.The local electrical properties of such a nanostructured material were probed, by conductive atomicforce microscopy collecting high statistics of I-V curves. The main observed result was theSchottky barrier height (SBH) dependence on the cluster size. This behaviour is interpretedconsidering the physics of few electron quantum dots merged with the ballistic transport. A quitesatisfying agreement between the theoretical forecast behaviour and the experimental data has beenfound.
Au; SiC; Electrical properties
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.11769/13784
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