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A new Raman metric for the characterisation of graphene oxide and its derivatives

King, Alice A. K., Davies, Benjamin R., Noorbehesht, Nikan, Newman, Peter, Church, Tamara L., Harris, Andrew T., Razal, Joselito M. and Minett, Andrew I. 2016, A new Raman metric for the characterisation of graphene oxide and its derivatives, Scientific reports, vol. 6, Article number : 19491, pp. 1-6, doi: 10.1038/srep19491.

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Title A new Raman metric for the characterisation of graphene oxide and its derivatives
Author(s) King, Alice A. K.
Davies, Benjamin R.
Noorbehesht, Nikan
Newman, Peter
Church, Tamara L.
Harris, Andrew T.
Razal, Joselito M.
Minett, Andrew I.
Journal name Scientific reports
Volume number 6
Season Article number : 19491
Start page 1
End page 6
Total pages 6
Publisher Nature Publishing Group
Place of publication London, Eng.
Publication date 2016-01-18
ISSN 2045-2322
Keyword(s) graphene
nanoscale materials
structural properties
Summary Raman spectroscopy is among the primary techniques for the characterisation of graphene materials, as it provides insights into the quality of measured graphenes including their structure and conductivity as well as the presence of dopants. However, our ability to draw conclusions based on such spectra is limited by a lack of understanding regarding the origins of the peaks. Consequently, traditional characterisation techniques, which estimate the quality of the graphene material using the intensity ratio between the D and the G peaks, are unreliable for both GO and rGO. Herein we reanalyse the Raman spectra of graphenes and show that traditional methods rely upon an apparent G peak which is in fact a superposition of the G and D' peaks. We use this understanding to develop a new Raman characterisation method for graphenes that considers the D' peak by using its overtone the 2D'. We demonstrate the superiority and consistency of this method for calculating the oxygen content of graphenes, and use the relationship between the D' peak and graphene quality to define three regimes. This has important implications for purification techniques because, once GO is reduced beyond a critical threshold, further reduction offers limited gain in conductivity.
Language eng
DOI 10.1038/srep19491
Field of Research 091205 Functional Materials
Socio Economic Objective 860406 Synthetic Fibres
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, The Authors
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30081114

Document type: Journal Article
Collections: Institute for Frontier Materials
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Created: Wed, 03 Feb 2016, 09:47:16 EST

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.