dc.contributor.author |
Ndlovu, GF
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dc.contributor.author |
Roos, WD
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dc.contributor.author |
Wang, ZM
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dc.contributor.author |
Asante, JKO
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dc.contributor.author |
Mashapa, MG
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dc.contributor.author |
Jafta, C
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dc.contributor.author |
Mwakikunga, Bonex W
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dc.contributor.author |
Hillie, KT
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dc.date.accessioned |
2012-05-04T12:29:15Z |
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dc.date.available |
2012-05-04T12:29:15Z |
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dc.date.issued |
2012-03 |
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dc.identifier.citation |
Ndlovu, GF, Roos, WD, Wanf, ZM, Asante, JKO, Mashapa, MG, Jafta, C, Mwakikunga, BW and Hillie, KT. 2012. Epitaxial deposition of silver ultrafine nano-clusters on defect-free surfaces of HOPG-derived few-layer graphene in a UHV multi-chamber by in-situ STM, ex-situ XPS and ab initio calculations. Nanoscale Research Letters, vol. 7:173, DOI: 10.1186/1556-276X-7-173 |
en_US |
dc.identifier.issn |
1556-276X |
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dc.identifier.issn |
1931-7573 |
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dc.identifier.uri |
http://rd.springer.com/article/10.1186/1556-276X-7-173
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|
dc.identifier.uri |
http://hdl.handle.net/10204/5836
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|
dc.description |
Copyright: 2012 Ndlovu et al; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution
License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium,
provided the original work is properly cited. |
en_US |
dc.description.abstract |
The growth of three-dimensional ultra-fine spherical nano-particles of silver on few layers of graphene derived from highly oriented pyrolytic graphite in ultra-high vacuum were characterized using in situ scanning tunneling microscopy (STM) in conjunction with X-ray photoelectron spectroscopy. The energetics of the Ag clusters was determined by DFT simulations. The Ag clusters appeared spherical with size distribution averaging approximately 2 nm in diameter. STM revealed the preferred site for the position of the Ag atom in the C-benzene ring of graphene. Of the three sites, the C-C bridge, the C-hexagon hollow, and the direct top of the C atom, Ag prefers to stay on top of the C atom, contrary to expectation of the hexagon-close packing. Ab initio calculations confirm the lowest potential energy between Ag and the graphene structure to be at the exact site determined from STM imaging. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Springer |
en_US |
dc.relation.ispartofseries |
Workflow: 8595 |
|
dc.subject |
Ag clusters |
en_US |
dc.subject |
Silver |
en_US |
dc.subject |
Graphene |
en_US |
dc.subject |
STM |
en_US |
dc.title |
Epitaxial deposition of silver ultrafine nano-clusters on defect-free surfaces of HOPG-derived few-layer graphene in a UHV multi-chamber by in-situ STM, ex-situ XPS and ab initio calculations |
en_US |
dc.type |
Article |
en_US |
dc.identifier.apacitation |
Ndlovu, G., Roos, W., Wang, Z., Asante, J., Mashapa, M., Jafta, C., ... Hillie, K. (2012). Epitaxial deposition of silver ultrafine nano-clusters on defect-free surfaces of HOPG-derived few-layer graphene in a UHV multi-chamber by in-situ STM, ex-situ XPS and ab initio calculations. http://hdl.handle.net/10204/5836 |
en_ZA |
dc.identifier.chicagocitation |
Ndlovu, GF, WD Roos, ZM Wang, JKO Asante, MG Mashapa, C Jafta, Bonex W Mwakikunga, and KT Hillie "Epitaxial deposition of silver ultrafine nano-clusters on defect-free surfaces of HOPG-derived few-layer graphene in a UHV multi-chamber by in-situ STM, ex-situ XPS and ab initio calculations." (2012) http://hdl.handle.net/10204/5836 |
en_ZA |
dc.identifier.vancouvercitation |
Ndlovu G, Roos W, Wang Z, Asante J, Mashapa M, Jafta C, et al. Epitaxial deposition of silver ultrafine nano-clusters on defect-free surfaces of HOPG-derived few-layer graphene in a UHV multi-chamber by in-situ STM, ex-situ XPS and ab initio calculations. 2012; http://hdl.handle.net/10204/5836. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Ndlovu, GF
AU - Roos, WD
AU - Wang, ZM
AU - Asante, JKO
AU - Mashapa, MG
AU - Jafta, C
AU - Mwakikunga, Bonex W
AU - Hillie, KT
AB - The growth of three-dimensional ultra-fine spherical nano-particles of silver on few layers of graphene derived from highly oriented pyrolytic graphite in ultra-high vacuum were characterized using in situ scanning tunneling microscopy (STM) in conjunction with X-ray photoelectron spectroscopy. The energetics of the Ag clusters was determined by DFT simulations. The Ag clusters appeared spherical with size distribution averaging approximately 2 nm in diameter. STM revealed the preferred site for the position of the Ag atom in the C-benzene ring of graphene. Of the three sites, the C-C bridge, the C-hexagon hollow, and the direct top of the C atom, Ag prefers to stay on top of the C atom, contrary to expectation of the hexagon-close packing. Ab initio calculations confirm the lowest potential energy between Ag and the graphene structure to be at the exact site determined from STM imaging.
DA - 2012-03
DB - ResearchSpace
DP - CSIR
KW - Ag clusters
KW - Silver
KW - Graphene
KW - STM
LK - https://researchspace.csir.co.za
PY - 2012
SM - 1556-276X
SM - 1931-7573
T1 - Epitaxial deposition of silver ultrafine nano-clusters on defect-free surfaces of HOPG-derived few-layer graphene in a UHV multi-chamber by in-situ STM, ex-situ XPS and ab initio calculations
TI - Epitaxial deposition of silver ultrafine nano-clusters on defect-free surfaces of HOPG-derived few-layer graphene in a UHV multi-chamber by in-situ STM, ex-situ XPS and ab initio calculations
UR - http://hdl.handle.net/10204/5836
ER -
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en_ZA |