Changes in metal nanoparticle shape and size induced by swift heavy-ion irradiation

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dc.contributor.authorRidgway, MCen_AU
dc.contributor.authorKluth, Pen_AU
dc.contributor.authorGiulian, Ren_AU
dc.contributor.authorSprouster, DJen_AU
dc.contributor.authorAraujo, LLen_AU
dc.contributor.authorSchnohr, CSen_AU
dc.contributor.authorLlewellyn, DJen_AU
dc.contributor.authorByrne, APen_AU
dc.contributor.authorForan, GJen_AU
dc.contributor.authorCookson, DJen_AU
dc.date.accessioned2009-06-19T05:47:07Zen_AU
dc.date.accessioned2010-04-30T05:04:18Zen_AU
dc.date.available2009-06-19T05:47:07Zen_AU
dc.date.available2010-04-30T05:04:18Zen_AU
dc.date.issued2009-03en_AU
dc.date.statistics2009-03en_AU
dc.description.abstractChanges in the shape and size of Co, Pt and An nanoparticles induced by swift heavy-ion irradiation (SHII) have been characterized using a combination of transmission electron microscopy, small-angle X-ray scattering and X-ray absorption near-edge Structure. Elemental nanoparticles of diameters 2-15 nm were first formed in amorphous SiO2 by ion implantation and thermal annealing and then irradiated at room temperature with 27-185 MeV Au ions as a function of fluence. Spherical nanoparticles below a minimum diameter (4-7 nm) remained spherical under SHII but progressively decreased in size as a result of dissolution into the SiO2 matrix. Spherical nanoparticles above the minimum diameter threshold were transformed to elongated rods aligned with the ion beamdirection. The nanorod width saturated at an electronic energy deposition dependent value, progressively increasing from 4-6 to 7-10nm (at 518 keV/nm, respectively) while the nanorod length exhibited a broad distribution consistent with that of the unirradiated spherical nanoparticles. The threshold diameter for spherical nanoparticle elongation was comparable to the saturation value of nanorod width. We correlate this saturation value with the diameter of the molten track induced in amorphous SiO2 by SHII. In summary, changes in nanoparticle shape and size are governed to a large extent by the ion irradiation parameters. © 2009, Elsevier Ltd.en_AU
dc.identifier.citationRidgway, M. C., Kluth, P., Giulian, R., Sprouster, D. J., Araujo, L. L., Schnohr, C. S., Llewellyn, D. J., Byrne, A. P., Foran, G. J., & Cookson, D. J. (2009). Changes in metal nanoparticle shape and size induced by swift heavy-ion irradiation. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 267(6), 931-935. doi:10.1016/j.nimb.2009.02.025en_AU
dc.identifier.govdoc1279en_AU
dc.identifier.issn0168-583Xen_AU
dc.identifier.issue6en_AU
dc.identifier.journaltitleNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atomsen_AU
dc.identifier.pagination931-935en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.nimb.2009.02.025en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1442en_AU
dc.identifier.volume267en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectSynchrotron radiationen_AU
dc.subjectIrradiationen_AU
dc.subjectHeavy ionsen_AU
dc.subjectTransmission electron microscopyen_AU
dc.subjectSmall angle scatteringen_AU
dc.subjectAnnealingen_AU
dc.titleChanges in metal nanoparticle shape and size induced by swift heavy-ion irradiationen_AU
dc.typeJournal Articleen_AU
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