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SAXS data modelling for the characterisation of ion tracks in polymers

Wang, Xue ; Dutt, Shankar ; Notthoff, Christian ; Kiy, Alexander ; Mota-Santiago, Pablo ; Mudie, Stephen T. ; Toimil-Molares, Maria E. ; Liu, Feng ; Wang, Yugang ; Kluth, Patrick (2022)
SAXS data modelling for the characterisation of ion tracks in polymers.
In: Physical Chemistry Chemical Physics, 24 (16)
doi: 10.1039/D1CP05813D
Article, Bibliographie

Abstract

Here, we present new models to fit small angle X-ray scattering (SAXS) data for the characterization of ion tracks in polymers. Ion tracks in polyethylene terephthalate (PET), polycarbonate (PC), polyimide (PI) and polymethyl methacrylate (PMMA) were created by swift heavy ion irradiation using Au-197 and U-238 with energies between 185 MeV and 2.0 GeV. Transmission SAXS measurements were performed at the Australian Synchrotron. SAXS data were analysed using two new models that describe the tracks by a cylindrical structure composed of a highly damaged core with a gradual transition to the undamaged material. First, we investigate the 'Soft Cylinder Model', which assumes a smooth function to describe the transition region by a gradual change in density from a core to a matrix. As a simplified and computational less expensive version of the 'Soft Cylinder Model', the 'Core Transition Model' was developed to enable fast fitting. This model assumes a linear increase in density from the core to the matrix. Both models yield superior fits to the experimental SAXS data compared with the often-used simple 'Hard Cylinder Model' assuming a constant density with an abrupt transition.

Item Type: Article
Erschienen: 2022
Creators: Wang, Xue ; Dutt, Shankar ; Notthoff, Christian ; Kiy, Alexander ; Mota-Santiago, Pablo ; Mudie, Stephen T. ; Toimil-Molares, Maria E. ; Liu, Feng ; Wang, Yugang ; Kluth, Patrick
Type of entry: Bibliographie
Title: SAXS data modelling for the characterisation of ion tracks in polymers
Language: English
Date: March 2022
Publisher: Royal Society of Chemistry Publishing
Journal or Publication Title: Physical Chemistry Chemical Physics
Volume of the journal: 24
Issue Number: 16
DOI: 10.1039/D1CP05813D
Abstract:

Here, we present new models to fit small angle X-ray scattering (SAXS) data for the characterization of ion tracks in polymers. Ion tracks in polyethylene terephthalate (PET), polycarbonate (PC), polyimide (PI) and polymethyl methacrylate (PMMA) were created by swift heavy ion irradiation using Au-197 and U-238 with energies between 185 MeV and 2.0 GeV. Transmission SAXS measurements were performed at the Australian Synchrotron. SAXS data were analysed using two new models that describe the tracks by a cylindrical structure composed of a highly damaged core with a gradual transition to the undamaged material. First, we investigate the 'Soft Cylinder Model', which assumes a smooth function to describe the transition region by a gradual change in density from a core to a matrix. As a simplified and computational less expensive version of the 'Soft Cylinder Model', the 'Core Transition Model' was developed to enable fast fitting. This model assumes a linear increase in density from the core to the matrix. Both models yield superior fits to the experimental SAXS data compared with the often-used simple 'Hard Cylinder Model' assuming a constant density with an abrupt transition.

Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Ion-Beam-Modified Materials
Date Deposited: 27 Feb 2024 06:05
Last Modified: 27 Feb 2024 07:54
PPN: 515826251
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