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Abstract. We studied the influence of the size and shape of silicon nanoclusters on their optical response. For this purpose, clusters were prepared by deposition, and subsequent diffusion and nucleation, of Si atoms on CaF2 substrate surfaces. By varying the growth parameters, oblate aggregates with sizes of between 5 and 30nm and axial ratios between almost unity and 0.1 were generated. We found...
Abstract. Gold films with a nominal thickness of 540 monolayers were grown on dielectric substrates and imaged by scanning force microscopy (SFM). The films originally consisted of well-separated or densely packed clusters. During imaging in contact mode, the morphology of the films changed drastically. At low coverage, i.e. 10 monolayers, the well-known stripes originating from mobile clusters, eventually...
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