Ion irradiation effects on metallic nanocrystals

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dc.contributor.authorKluth, Pen_AU
dc.contributor.authorJohannessen, Ben_AU
dc.contributor.authorGiulian, Ren_AU
dc.contributor.authorSchnohr, CSen_AU
dc.contributor.authorForan, GJen_AU
dc.contributor.authorCookson, DJen_AU
dc.contributor.authorByrne, APen_AU
dc.contributor.authorRidgway, MCen_AU
dc.date.accessioned2008-04-23T05:48:17Zen_AU
dc.date.accessioned2010-04-30T05:02:52Zen_AU
dc.date.available2008-04-23T05:48:17Zen_AU
dc.date.available2010-04-30T05:02:52Zen_AU
dc.date.issued2007-07en_AU
dc.date.statistics2007-07en_AU
dc.description.abstractWe have investigated structural and morphological properties of metallic nanocrystals ( NCs) exposed to ion irradiation. NCs were characterized by transmission electron microscopy in combination with advanced synchrotron-based analytical techniques, in particular X-ray absorption spectroscopy and small-angle X-ray scattering. A number of different effects were observed depending on the irradiation conditions. At energies where nuclear stopping is predominant, structural disorder/amorphization followed by inverse Ostwald ripening/dissolution due to ion beam mixing was observed for Au and Cu NCs embedded in SiO2. The ion-irradiation-induced crystalline to amorphous transition in the NCs, which cannot be achieved in the corresponding bulk metals, was attributed to their initially higher structural energy as compared to bulk material and possibly preferential nucleation of the amorphous phase at the NC/SiO2 interface. At very high irradiation energies (swift heavy ion irradiation), where the energy loss is nearly entirely due to electronic stopping, a size-dependent shape transformation of the NCs from spheres to rod like shapes was apparent in Au NCs. Our preliminary results are in good agreement with considerations on melting of the NCs in the ion track as one mechanism involved in the shape transformation. © 2007, Taylor & Francis Ltd.en_AU
dc.identifier.citationKluth, P., Johannessen, B., Giulian, R., Schnohr, C. S., Foran, G. J., Cookson, D. J., Byrne, A. P., & Ridgway, M. C. (2007). Ion irradiation effects on metallic nanocrystals. Radiation Effects and Defects in Solids, 162(7-8), 501-513. doi:10.1080/10420150701472221en_AU
dc.identifier.govdoc1182en_AU
dc.identifier.issn1042-0150en_AU
dc.identifier.issue7-8en_AU
dc.identifier.journaltitleRadiation Effects and Defects in Solidsen_AU
dc.identifier.pagination501-513en_AU
dc.identifier.urihttp://dx.doi.org/10.1080/10420150701472221en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1115en_AU
dc.identifier.volume162en_AU
dc.language.isoenen_AU
dc.publisherTaylor & Francisen_AU
dc.subjectNanostructuresen_AU
dc.subjectIrradiationen_AU
dc.subjectSmall angle scatteringen_AU
dc.subjectIonsen_AU
dc.subjectAbsorptionen_AU
dc.subjectSynthesisen_AU
dc.subjectCrystalsen_AU
dc.subjectBeamsen_AU
dc.titleIon irradiation effects on metallic nanocrystalsen_AU
dc.typeJournal Articleen_AU
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