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Saturation of the ion-hammering effect for large non-hydrostatic capillarity stresses in colloidal silica nanoparticles

Rizza, G; Ramjauny, Yaasiin; Hayoun, Marc; Perruchas, Sandrine; Gacoin, Thierry; Kluth, Patrick; Ridgway, Mark C

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We investigate the role of capillarity stresses on the ion-hammering phenomenon when sub-micrometer colloidal particles are considered. To this end, nearly monodisperse, chemically synthesized silica (SiO2) colloids (100, 300 and 600nm) were irradiated at room temperature (300K) with 4MeV Au ions for fluences up to Φ = 1.8 × 1016cm-2. It has been taken for granted that the transverse dimension of an ion-deformable amorphous material grows exponentially with the irradiation fluence, L(φ) =...[Show more]

dc.contributor.authorRizza, G
dc.contributor.authorRamjauny, Yaasiin
dc.contributor.authorHayoun, Marc
dc.contributor.authorPerruchas, Sandrine
dc.contributor.authorGacoin, Thierry
dc.contributor.authorKluth, Patrick
dc.contributor.authorRidgway, Mark C
dc.date.accessioned2015-12-08T22:10:17Z
dc.identifier.issn0957-4484
dc.identifier.urihttp://hdl.handle.net/1885/29276
dc.description.abstractWe investigate the role of capillarity stresses on the ion-hammering phenomenon when sub-micrometer colloidal particles are considered. To this end, nearly monodisperse, chemically synthesized silica (SiO2) colloids (100, 300 and 600nm) were irradiated at room temperature (300K) with 4MeV Au ions for fluences up to Φ = 1.8 × 1016cm-2. It has been taken for granted that the transverse dimension of an ion-deformable amorphous material grows exponentially with the irradiation fluence, L(φ) = L(0)exp[A0Φ]. Here, we show that for sub-micrometer particles the irradiation-induced deformation saturates for larger fluences, const. The saturation fluence depends on the initial dimension of the colloidal nanoparticles: the smaller the dimension of the colloids, the lower the saturation fluence. Experimental data are successfully accounted for by having recourse to a phenomenological model first developed by Klaumünzer and further elaborated by van Dillen. We also estimate the evolution with fluence of the principal stresses inside the particles, σ11(φ) = σ22(φ) and σ33(φ), and we show that they evolve toward a steady-state value following a sigmoidal-like behavior. Furthermore, when stresses induced by the surface curvature become non-negligible the approximation often made that the deformation strain rate, A0 = dL/L dΦ, remains constant upon irradiation is no longer valid. We show that A0 evolves with the irradiation fluence, e.g., A0 → A(φ) and we relate this behavior to the evolution of the stresses upon irradiation. Finally, this work allows us to define the limits of the ion-hammering effect when the non-hydrostatic capillarity stresses become important.
dc.publisherInstitute of Physics Publishing
dc.sourceNanotechnology
dc.subjectKeywords: Capillarity stress; Colloidal nanoparticles; Colloidal particle; Colloidal silica; Deformation strain; Experimental data; Fluences; Monodisperse; Phenomenological models; Principal stress; Room temperature; Saturation fluence; Steady-state values; Submicr
dc.titleSaturation of the ion-hammering effect for large non-hydrostatic capillarity stresses in colloidal silica nanoparticles
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume22
dc.date.issued2011
local.identifier.absfor020406 - Surfaces and Structural Properties of Condensed Matter
local.identifier.absfor100708 - Nanomaterials
local.identifier.ariespublicationu4153526xPUB64
local.type.statusPublished Version
local.contributor.affiliationRizza, G, Ecole Polytechnique
local.contributor.affiliationRamjauny, Yaasiin, Ecole Polytechnique
local.contributor.affiliationHayoun, Marc, Ecole Polytechnique,
local.contributor.affiliationPerruchas, Sandrine, Ecole Polytechnique
local.contributor.affiliationGacoin, Thierry, Ecole Polytechnique
local.contributor.affiliationKluth, Patrick, 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.issue475302
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage7
local.identifier.doi10.1088/0957-4484/22/47/475302
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2016-02-24T10:38:12Z
local.identifier.scopusID2-s2.0-80655127947
local.identifier.thomsonID000296759000003
CollectionsANU Research Publications

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