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Hydrostatic Compression of Graphite Oxide to 49 GPa: A Raman Spectroscopic Study

Published online by Cambridge University Press:  16 March 2015

Varghese Swamy ,
Jong Boon Ooi ,
Alexander Kurnosov ,
Leonid S. Dubrovinsky ,
Alexei Y. Kuznetsov  and
Ahmad Fauzi M. Noor
Varghese Swamy
Affiliation:
School of Engineering, Monash University Malaysia, Bandar Sunway, Malaysia
Jong Boon Ooi
Affiliation:
School of Engineering, Monash University Malaysia, Bandar Sunway, Malaysia
Alexander Kurnosov
Affiliation:
Bayerisches Geoinstitut, University of Bayreuth, Bavaria, Germany
Leonid S. Dubrovinsky
Affiliation:
Bayerisches Geoinstitut, University of Bayreuth, Bavaria, Germany
Alexei Y. Kuznetsov
Affiliation:
INMETRO, DIMAT, Rio de Janeiro, Brazil
Ahmad Fauzi M. Noor
Affiliation:
School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Penang, Malaysia
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Abstract

The compression and decompression behaviors of graphite oxide have been investigated using in situ Raman measurements in a diamond-anvil cell at room temperature. The so-called G band (in-plane E2g mode ∼1600 cm-1) was followed to 49 GPa during compression and back to ambient under decompression. The Raman frequency of the G band increases sublinearly with increasing hydrostatic pressure, eventually nearly flattening out at the highest pressure measured. This trend is reversed upon decompression, fully recovering to the ambient spectrum. The increased broadening suggests a reversible disordering of the structure without significant sp2-sp3 rehybridization under pressure.

Keywords

Raman spectroscopynanostructurecrystallographic structure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1727: Symposium K – Graphene and Graphene Nanocomposites , 2015 , mrsf14-1727-k10-10
Copyright
Copyright © Materials Research Society 2015 

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