dc.contributor.author |
Mouane, O
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|
dc.contributor.author |
Sideras-Haddad, E
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dc.contributor.author |
Wamwangi, D
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|
dc.contributor.author |
Forbes, A
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dc.contributor.author |
Peters, G
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|
dc.contributor.author |
Erasmus, RM
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dc.contributor.author |
Mwakikunga, Bonex W
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dc.contributor.author |
Gkanetsos, T
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dc.date.accessioned |
2021-04-12T14:04:45Z |
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dc.date.available |
2021-04-12T14:04:45Z |
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dc.date.issued |
2020-10 |
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dc.identifier.citation |
Mouane, O., Sideras-Haddad, E., Wamwangi, D., Forbes, A., Peters, G., Erasmus, R., Mwakikunga, B.W. & Gkanetsos, T. et al. 2020. Formation of monodispersed carbon nanospheres by pulsed laser irradiation of HOPG. <i>Materials Chemistry and Physics, 253.</i> http://hdl.handle.net/10204/11978 |
en_ZA |
dc.identifier.issn |
0254-0584 |
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dc.identifier.issn |
1879-3312 |
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dc.identifier.uri |
https://doi.org/10.1016/j.matchemphys.2020.123269
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dc.identifier.uri |
https://www.sciencedirect.com/science/article/pii/S0254058420306398
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|
dc.identifier.uri |
http://hdl.handle.net/10204/11978
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|
dc.description.abstract |
Monodispersed carbon-based nanostructures in the diameter range of 40–50 nm have been produced by pulsed laser irradiation. A pulsed ultraviolet laser light (308 nm) was used to irradiate Highly Oriented Pyrolytic Graphite surfaces with power densities of the order 108 W cm−2. Scanning Electron Microscope images have exhibited a homogenous size distribution of amorphous carbon nanospheres as confirmed by the ID/IG ratio of the Raman spectra. It is shown that the presence of hydrogen acts as a nucleating agent for the carbon nanospheres observed at the outer region of a shockwave induced by the laser pulses at the point of impact. The effect of the energy density, the number of pulses applied to the sample, and the hydrogen flow rate are investigated to elucidate the phase transition from surface graphite-to-carbon nanospheres. Using analytical approaches, we establish the thermodynamic variables (temperature and pressure) corresponding to the laser pulses that drive the structural transformation in hydrogen. |
en_US |
dc.format |
Abstract |
en_US |
dc.language.iso |
en |
en_US |
dc.source |
Materials Chemistry and Physics, 253 |
en_US |
dc.subject |
Carbon nanospheres |
en_US |
dc.subject |
HOPG nano-Structuration |
en_US |
dc.subject |
Pulsed laser ablation |
en_US |
dc.subject |
Shockwaves |
en_US |
dc.title |
Formation of monodispersed carbon nanospheres by pulsed laser irradiation of HOPG |
en_US |
dc.type |
Article |
en_US |
dc.description.pages |
10pp |
en_US |
dc.description.note |
© 2020 Elsevier B.V. All rights reserved. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website: https://www.sciencedirect.com/science/article/pii/S0254058420306398 |
en_US |
dc.description.cluster |
Chemicals |
en_US |
dc.description.impactarea |
NS Materials for Sensing App |
en_US |
dc.identifier.apacitation |
Mouane, O., Sideras-Haddad, E., Wamwangi, D., Forbes, A., Peters, G., Erasmus, R., ... Gkanetsos, T. (2020). Formation of monodispersed carbon nanospheres by pulsed laser irradiation of HOPG. <i>Materials Chemistry and Physics, 253</i>, http://hdl.handle.net/10204/11978 |
en_ZA |
dc.identifier.chicagocitation |
Mouane, O, E Sideras-Haddad, D Wamwangi, A Forbes, G Peters, RM Erasmus, Bonex W Mwakikunga, and T Gkanetsos "Formation of monodispersed carbon nanospheres by pulsed laser irradiation of HOPG." <i>Materials Chemistry and Physics, 253</i> (2020) http://hdl.handle.net/10204/11978 |
en_ZA |
dc.identifier.vancouvercitation |
Mouane O, Sideras-Haddad E, Wamwangi D, Forbes A, Peters G, Erasmus R, et al. Formation of monodispersed carbon nanospheres by pulsed laser irradiation of HOPG. Materials Chemistry and Physics, 253. 2020; http://hdl.handle.net/10204/11978. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Mouane, O
AU - Sideras-Haddad, E
AU - Wamwangi, D
AU - Forbes, A
AU - Peters, G
AU - Erasmus, RM
AU - Mwakikunga, Bonex W
AU - Gkanetsos, T
AB - Monodispersed carbon-based nanostructures in the diameter range of 40–50 nm have been produced by pulsed laser irradiation. A pulsed ultraviolet laser light (308 nm) was used to irradiate Highly Oriented Pyrolytic Graphite surfaces with power densities of the order 108 W cm−2. Scanning Electron Microscope images have exhibited a homogenous size distribution of amorphous carbon nanospheres as confirmed by the ID/IG ratio of the Raman spectra. It is shown that the presence of hydrogen acts as a nucleating agent for the carbon nanospheres observed at the outer region of a shockwave induced by the laser pulses at the point of impact. The effect of the energy density, the number of pulses applied to the sample, and the hydrogen flow rate are investigated to elucidate the phase transition from surface graphite-to-carbon nanospheres. Using analytical approaches, we establish the thermodynamic variables (temperature and pressure) corresponding to the laser pulses that drive the structural transformation in hydrogen.
DA - 2020-10
DB - ResearchSpace
DP - CSIR
J1 - Materials Chemistry and Physics, 253
KW - Carbon nanospheres
KW - HOPG nano-Structuration
KW - Pulsed laser ablation
KW - Shockwaves
LK - https://researchspace.csir.co.za
PY - 2020
SM - 0254-0584
SM - 1879-3312
T1 - Formation of monodispersed carbon nanospheres by pulsed laser irradiation of HOPG
TI - Formation of monodispersed carbon nanospheres by pulsed laser irradiation of HOPG
UR - http://hdl.handle.net/10204/11978
ER - |
en_ZA |
dc.identifier.worklist |
24323 |
en_US |