Assessing phase discrimination via the segmentation of an elemental energy dispersive X-ray spectroscopy map: a case study of Bi2Te3 and Bi2Te2S

J. B. Byrnes; A. A. Gazder; S. Aminorroaya Yamini

doi:10.1039/C7RA08594J

Assessing phase discrimination via the segmentation of an elemental energy dispersive X-ray spectroscopy map: a case study of Bi₂Te₃ and Bi₂Te₂S

J. B. Byrnes,^a A. A. Gazder^b and S. Aminorroaya Yamini

*^ac

Author affiliations

* Corresponding authors

^a Institute of Superconducting and Electronic Materials, University of Wollongong, New South Wales 2500, Australia

^b Electron Microscopy Centre, University of Wollongong, New South Wales 2500, Australia

^c Department of Engineering and Mathematics, Sheffield Hallam University, Sheffield, UK
E-mail: S.Aminorroaya@shu.ac.uk

Abstract

The present case study critically assesses the efficacy of a previously proposed segmentation methodology as a means to discriminate phases via post-processing the image of an elemental map. In the Bi₂Te_2.5S_0.5 multiphase compound, the reference spectra of the Bi₂Te₃ and Bi₂Te₂S phases are distinct enough to effectively distinguish two phases during map acquisition. Since the counts of the sulphur-K peak in the X-ray emission data are significantly higher for Bi₂Te₂S compared to Bi₂Te₃, the segmentation methodology exploits this variation and enables successful phase discrimination via post-processing the image of the elemental map.

Article information

https://doi.org/10.1039/C7RA08594J

Article type

Paper

Submitted

03 Aug 2017

Accepted

08 Oct 2017

First published

15 Feb 2018

This article is Open Access

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RSC Adv., 2018,8, 7457-7464

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Assessing phase discrimination via the segmentation of an elemental energy dispersive X-ray spectroscopy map: a case study of Bi₂Te₃ and Bi₂Te₂S

J. B. Byrnes, A. A. Gazder and S. Aminorroaya Yamini, RSC Adv., 2018, 8, 7457 DOI: 10.1039/C7RA08594J

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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Assessing phase discrimination via the segmentation of an elemental energy dispersive X-ray spectroscopy map: a case study of Bi₂Te₃ and Bi₂Te₂S

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Assessing phase discrimination via the segmentation of an elemental energy dispersive X-ray spectroscopy map: a case study of Bi₂Te₃ and Bi₂Te₂S

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