Structure and Morphology of Ion Irradiated Au Nanocrystals in SiO 2

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dc.contributor.authorKluth, Patrick
dc.contributor.authorJohannessen, Bernt
dc.contributor.authorKluth, Susan
dc.contributor.authorForan, Garry J
dc.contributor.authorCookson, D J
dc.contributor.authorRidgway, Mark C
dc.date.accessioned2015-12-13T23:03:47Z
dc.date.issued2006
dc.date.updated2015-12-12T07:51:14Z
dc.description.abstractWe have investigated the effect of ion irradiation on the structure and morphology of Au nanocrystals (NCs) fabricated by ion beam synthesis in a thin SiO2 layer on a Si substrate. Extended X-ray absorption fine structure (EXAFS) spectroscopy measurements show a significant drop in the average Au-Au coordination, as well as a loss of medium and long range order with increasing irradiation dose. Small angle X-ray scattering (SAXS) measurements reveal a concomitant reduction in average NC size. These observations are a consequence of structural disorder and collisional mixing induced by the irradiation. The observed reduction in average Au-Au coordination by EXAFS differs significantly from that estimated from the average NC sizes evaluated using SAXS. This behavior can be explained by the dissolution of Au NCs into the SiO2 matrix. A significant bond-length contraction indicates that part of this material forms small Au clusters (dimers, trimers, etc.) during irradiation that cannot be detected by SAXS. Combining the results from SAXS and EXAFS measurements, we estimate the volume fraction of such clusters.
dc.identifier.issn0168-583X
dc.identifier.urihttp://hdl.handle.net/1885/85081
dc.publisherElsevier
dc.sourceNuclear Instruments and Methods in Physics Research: Section B
dc.subjectKeywords: Gold; Ion beams; Ion implantation; Irradiation; Silica; Thin films; Extended X-ray absorption fine structure (EXAFS) spectroscopy; Ion irradiation; Metal nanocrystals; Small angle X-ray scattering (SAXS); Nanostructured materials EXAFS; Ion implantation; Ion irradiation; Metal nanocrystals; SAXS
dc.titleStructure and Morphology of Ion Irradiated Au Nanocrystals in SiO 2
dc.typeJournal article
local.bibliographicCitation.lastpage219
local.bibliographicCitation.startpage215
local.contributor.affiliationKluth, Patrick, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationJohannessen, Bernt, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationKluth, Susan, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationForan, Garry J, Australian Nuclear Science and Technology Organisation
local.contributor.affiliationCookson, D J, Australian Nuclear Science and Technology Organisation
local.contributor.affiliationRidgway, Mark C, College of Physical and Mathematical Sciences, ANU
local.contributor.authoremailu4054452@anu.edu.au
local.contributor.authoruidKluth, Patrick, u4054452
local.contributor.authoruidJohannessen, Bernt, u3985823
local.contributor.authoruidKluth, Susan, u3565710
local.contributor.authoruidRidgway, Mark C, u9001886
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.absfor020406 - Surfaces and Structural Properties of Condensed Matter
local.identifier.ariespublicationMigratedxPub13284
local.identifier.citationvolume250
local.identifier.doi10.1016/j.nimb.2006.04.113
local.identifier.scopusID2-s2.0-33746284519
local.identifier.uidSubmittedByMigrated
local.type.statusPublished Version

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