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Ion irradiation effects on metallic nanocrystals

Kluth, Patrick; Johannessen, Bernt; Giulian, Raquel; Schnohr, Claudia; Foran, Garry J; Cookson, D J; Byrne, Aidan; Ridgway, Mark C

Description

We 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...[Show more]

dc.contributor.authorKluth, Patrick
dc.contributor.authorJohannessen, Bernt
dc.contributor.authorGiulian, Raquel
dc.contributor.authorSchnohr, Claudia
dc.contributor.authorForan, Garry J
dc.contributor.authorCookson, D J
dc.contributor.authorByrne, Aidan
dc.contributor.authorRidgway, Mark C
dc.date.accessioned2015-12-08T22:08:38Z
dc.identifier.issn1042-0150
dc.identifier.urihttp://hdl.handle.net/1885/28685
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.
dc.publisherGordon and Breach
dc.sourceRadiation Effects and Defects in Solids
dc.subjectKeywords: Amorphization; Extended X ray absorption fine structure spectroscopy; Heavy ions; Ion bombardment; Nucleation; Transmission electron microscopy; X ray scattering; Amorphous transition; Metallic nanocrystals; Shape transformation; Nanocrystals EXAFS; Ion irradiation; Nanocrystals; SAXS; Swift heavy ions
dc.titleIon irradiation effects on metallic nanocrystals
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume162
dc.date.issued2007
local.identifier.absfor100799 - Nanotechnology not elsewhere classified
local.identifier.ariespublicationu8709800xPUB59
local.type.statusPublished Version
local.contributor.affiliationKluth, Patrick, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationJohannessen, Bernt, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationGiulian, Raquel, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationSchnohr, Claudia, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationForan, Garry J, Australian Nuclear Science and Technology Organisation
local.contributor.affiliationCookson, D J, Australian Synchrotron Research Program
local.contributor.affiliationByrne, Aidan, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationRidgway, Mark C, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.issue7-8
local.bibliographicCitation.startpage501
local.bibliographicCitation.lastpage513
local.identifier.doi10.1080/10420150701472221
dc.date.updated2015-12-08T07:18:48Z
local.identifier.scopusID2-s2.0-34548336662
CollectionsANU Research Publications

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