Berlin 2005 – scientific programme
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DS: Dünne Schichten
DS 20: Schichtwachstum
DS 20.5: Talk
Tuesday, March 8, 2005, 16:15–16:30, TU HS107
Effects of deposition on Cu-induced surface nanostructures on VSe2 layered crystals — •F. Dietz1, E. Spiecker1, S. Hollensteiner1, W. Jäger1, H. Haselier2, and H. Schroeder2 — 1Technische Fakulät der Christian-Albrechts-Universität zu Kiel — 2Forschungszentrum Jülich
The present study aims at the investigation of nanostrucuture networks which form upon Cu deposition on VSe2 surfaces [1] as templates for the formation of nanowires. The nanostructures were created applying UHV electron beam evaporation of Cu (≤ 2 nm) onto freshly cleaved (0001)-oriented VSe2 crystals at ambient temperature and at 200∘C. Subsequently Au with nominal coverage up to 2.5 nm was deposited at identical temperature. Light microscopy, scanning electron microscopy, and transmission electron microscopy investigations have been combined to characterize the effects of Au deposition following nanostrucuture formation. Au deposition at ambient temperature leads to formation of 2-dimensional islands within the network meshes forming an interconnected film at increased coverage. Detailed electron diffraction analyses show that the film corresponds to <111> textured fcc Au with an (220)Au∥(1120)VSe2 orientation relationship. Along the nanostructures decoration with large Au clusters occurs. At deposition temperature of 200∘C the decoration is even more pronounced leading to linear arrays of Au clusters.
[1] Spiecker et al., Microsc. Microanal. (2004), accepted.