We demonstrated an effective way of controlling the size dispersion of surface adsorbed nanoclusters by utilizing a reconstructed template with regular periodic porosity in the nanoscale range. Monodispersed cobalt (Co) nanoclusters of 3 nm sizes have been grown on the reconstructed 6H–SiC(0001) surface by electron-beam evaporation on the C-terminated template at room temperature. In situ scanning tunneling microscopy was used to study the nucleation process of the Co nanoclusters on this template. We found that the average cluster size remains constant for different Co coverage, and the cluster density is linearly dependent on the coverage. The monodispersion of the cluster size is suggested to be due to the physical confinement of the Co clusters by the porous honeycomb structure of the SiC reconstructed surface. X-ray photoelectron spectroscopy reveals that the carbon-rich hexagon template prevents cobalt silicide formation up to an annealing temperature of
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12 January 2004
Research Article|
January 12 2004
Growth of monodispersed cobalt nanoparticles on 6H–SiC(0001) honeycomb template
Wei Chen;
Wei Chen
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
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Kian Ping Loh;
Kian Ping Loh
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
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Hai Xu;
Hai Xu
Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542
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A. T. S. Wee
A. T. S. Wee
Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542
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Appl. Phys. Lett. 84, 281–283 (2004)
Article history
Received:
June 30 2003
Accepted:
November 18 2003
Citation
Wei Chen, Kian Ping Loh, Hai Xu, A. T. S. Wee; Growth of monodispersed cobalt nanoparticles on 6H–SiC(0001) honeycomb template. Appl. Phys. Lett. 12 January 2004; 84 (2): 281–283. https://doi.org/10.1063/1.1639508
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