Thin films of size-selected Mo clusters : growth modes and structures

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Physical Chemistry, Chemical Physics : PCCP ; 17 (2015), 32. - S. 20873-20881. - ISSN 1463-9076. - eISSN 1463-9084
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Thin films of MoO3 were prepared by deposition of size-selected ligand-free Mo clusters under high vacuum conditions and subsequent exposure to air. The growth pattern is highly dependent on the cluster size. At low coverage, small clusters (Mo51) form a continuous monolayer of fused particles. On top of this monolayer, additional clusters survive as individual entities. Medium sized clusters (Mo251 and Mo1253) do not coalesce and form a monolayer of clusters. Close examination using in situ scanning tunneling microscopy reveals a local order of the particles. At higher coverage a new pattern of large 3-dimensional aggregations of clusters (pylons) appears. The pylons are not formed under high vacuum conditions. Their formation is most likely caused by the air exposure. For the largest clusters (Mo3349) studied here, no monolayer is formed. Instead, the clusters are randomly distributed as expected for particles with zero mobility. These results demonstrate the high potential of cluster deposition for the production of new types of nanostructured surfaces, thin films and nanomaterials.
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ISO 690DOLLINGER, Andreas, Eun Ji PARK, Christoph H. STROBEL, Hannes BLEUEL, Alexander MARSTELLER, Hyun Ook SEO, Young Dok KIM, Gerd GANTEFÖR, 2015. Thin films of size-selected Mo clusters : growth modes and structures. In: Physical Chemistry, Chemical Physics : PCCP. 17(32), pp. 20873-20881. ISSN 1463-9076. eISSN 1463-9084. Available under: doi: 10.1039/c5cp03147h
BibTex
@article{Dollinger2015films-33044,
  year={2015},
  doi={10.1039/c5cp03147h},
  title={Thin films of size-selected Mo clusters : growth modes and structures},
  number={32},
  volume={17},
  issn={1463-9076},
  journal={Physical Chemistry, Chemical Physics : PCCP},
  pages={20873--20881},
  author={Dollinger, Andreas and Park, Eun Ji and Strobel, Christoph H. and Bleuel, Hannes and Marsteller, Alexander and Seo, Hyun Ook and Kim, Young Dok and Ganteför, Gerd}
}
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