Diamond-like-carbon nanoparticle production and agglomeration following UV multi-photon excitation of static naphthalene/helium gas mixtures

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dc.contributor.authorWalsh, Anton J.
dc.contributor.authorTielens, A. G. G. M.
dc.contributor.authorRuth, Albert A.
dc.contributor.funderEnterprise Irelanden
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderNederlandse Organisatie voor Wetenschappelijk Onderzoeken
dc.date.accessioned2017-01-19T12:05:55Z
dc.date.available2017-01-19T12:05:55Z
dc.date.issued2016-07-11
dc.date.updated2017-01-19T11:50:50Z
dc.description.abstractWe report the formation of nanoparticles with significant diamond character after UV multi-photon laser excitation of gaseous naphthalene, buffered in static helium gas, at room temperature. The nanoparticles are identified in situ by their absorption and scattering spectra between 400 and 850 nm, which are modeled using Mie theory. Comparisons of the particles’ spectroscopic and optical properties with those of carbonaceous materials indicate a sp3/sp2 hybridization ratio of 8:1 of the particles formed. The particle extinction in the closed static (unstirred) gas-phase system exhibits a complex and quasi-oscillatory time dependence for the duration of up to several hours with periods ranging from seconds to many minutes. The extinction dynamics of the system is based on a combination of transport features and particle interaction, predominantly agglomeration. The relatively long period of agglomeration allows for a unique analysis of the agglomeration process of diamond-like carbon nanoparticles in situ.en
dc.description.sponsorshipEnterprise Ireland (Basic Research Grant Scheme Contract No. SC/2003/96); Higher Education Authority (HEA–PRTLI3 scheme); Science Foundation Ireland (SFI Research Frontier Programme (Contract No. 11/RFP/3233)); Nederlandse Organisatie voor Wetenschappelijk Onderzoek/Netherlands Organization for Scientific Research (NOW Spinoza Award)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid024303
dc.identifier.citationWalsh, A. J., Tielens, A. G. G. M. and Ruth, A. A. (2016) 'Diamond-like-carbon nanoparticle production and agglomeration following UV multi-photon excitation of static naphthalene/helium gas mixtures', The Journal of Chemical Physics, 145(2), 024303 (12 pp). doi:10.1063/1.4955192en
dc.identifier.doi10.1063/1.4955192
dc.identifier.endpage024303-12en
dc.identifier.issn0021-9606
dc.identifier.issued2en
dc.identifier.journaltitleJournal of Chemical Physicsen
dc.identifier.startpage024303-1en
dc.identifier.urihttps://hdl.handle.net/10468/3479
dc.identifier.volume145en
dc.language.isoenen
dc.publisherAIP Publishingen
dc.rights© 2016, AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in J. Chem. Phys. 145, 024303 (2016) and may be found at http://aip.scitation.org/doi/abs/10.1063/1.4955192en
dc.subjectDiamond-like carbonen
dc.subjectNanofabricationen
dc.subjectNanoparticlesen
dc.subjectRefractive indexen
dc.subjectAromatic-hydrocarbon cationsen
dc.subjectOptical-propertiesen
dc.subjectDetonation nanodiamonden
dc.subjectWavelength dependenceen
dc.subjectAmorphous-carbonen
dc.subjectGraphiteen
dc.subjectDeliveryen
dc.subjectPhaseen
dc.subjectSooten
dc.subjectFragmentationen
dc.titleDiamond-like-carbon nanoparticle production and agglomeration following UV multi-photon excitation of static naphthalene/helium gas mixturesen
dc.typeArticle (peer-reviewed)en
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