A small angle neutron scattering and electrochemical impedance spectroscopy study of the nanostructure of the iron chalcogenide glass ion-selective electrode

B Pejcic; Roland De Marco; C E Buckley; C F Maitland; R Knott

doi:10.1016/j.talanta.2003.11.025

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A small angle neutron scattering and electrochemical impedance spectroscopy study of the nanostructure of the iron chalcogenide glass ion-selective electrode

Journal article

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A small angle neutron scattering and electrochemical impedance spectroscopy study of the nanostructure of the iron chalcogenide glass ion-selective electrode

B Pejcic, Roland De Marco, C E Buckley, C F Maitland and R Knott

Talanta, Vol.63(1), pp.149-157

2004

DOI: https://doi.org/10.1016/j.talanta.2003.11.025

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Abstract

chalcogenide

iron(III) ion-selective electrode

electrochemical impedance spectroscopy (EIS)

small angle neutron scattering (SANS)

iron nanostructure

This paper presents a preliminary structural and interfacial study of the iron chalcogenide glass [i.e., Fex(Ge28Sb 12Se60)100-x] ion-selective electrode (ISE) using small angle neutron scattering (SANS) and electrochemical impedance spectroscopy (EIS). SANS detected variations in the neutron scattering as a function of iron content in the chalcogenide glass. Furthermore, a change in the chalcogenide glass structure was observed at elevated iron dopant levels. Conversely, EIS was used to show that the iron chalcogenide membrane comprises various time constants, and the interfacial charge transfer reaction depends on the membrane iron content. Equivalent circuit modeling revealed that the charge transfer resistance decreases at elevated iron levels, and this may be related to the presence of iron defects in the glass. It is proposed that the iron chalcogenide membrane comprises an iron nanostructural network embedded in the amorphous matrix, and this directly influences the electrical conductivity and concomitant electrochemical reactivity of the glass. © 2003 Elsevier B.V. All rights reserved.

Details

Title: A small angle neutron scattering and electrochemical impedance spectroscopy study of the nanostructure of the iron chalcogenide glass ion-selective electrode
Authors: B Pejcic (Author) - Curtin University of Technology
Roland De Marco (Author) - Curtin University of Technology
C E Buckley (Author) - Curtin University of Technology
C F Maitland (Author) - Curtin University of Technology
R Knott (Author) - Australian Nuclear Science and Technology Organization
Publication details: Talanta, Vol.63(1), pp.149-157
Publisher: Elsevier BV
Date published: 2004
DOI: 10.1016/j.talanta.2003.11.025
ISSN: 0039-9140
Organisation Unit: University of the Sunshine Coast, Queensland; Office of the Deputy Vice-Chancellor (Research and Innovation)
Language: English
Record Identifier: 99448872902621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Chemistry, Analytical