Subsequent layer growth of supported nanoparticles by deposition of Sb4 clusters onto MoS2(0001)
Mathematisch-Naturwissenschaftliche Fakultät
The surface morphology after deposition of Sb4 clusters
onto MoS2(0001) at 90 K has been studied in detail with
scanning tunnelling microscopy in ultrahigh vacuum. It has
been found that during the initial stage of growth
two-dimensional nanoparticles are formed. With increasing
coverage these nanoparticles grow layer by layer and each layer
has the height of one monolayer of undissociated Sb4
clusters. The interface width (surface roughness) has been
quantitatively determined as a function of total coverage.
Ideal three-dimensional layer-by-layer growth has been
identified for the single particles according to a Poisson
distribution of exposed areas of the layers of the particles.
Consequently, antimony grows on MoS2(0001) without
interlayer diffusion which is suppressed by an effective step
edge (Schwoebel-Ehrlich) barrier.
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