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High Pressure Research
An International Journal
Volume 31, 2011 - Issue 1
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Selected papers from the XLVIIIth European High Pressure Research Group (EHPRG 48) Meeting at Uppsala (Sweden), 25–29 July 2010

High-pressure Raman study of stacked-cup carbon nanofibers

K. Papagelis Materials Science Department, University of Patras, 26504, Patras, GreeceCorrespondence[email protected]
,
J. Arvanitidis Department of Applied Sciences, Technological Educational Institute of Thessaloniki, 57400, Sindos, Greece; Physics Division, School of Technology, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
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D. Christofilos Physics Division, School of Technology, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
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S. M. Souliou Physics Division, School of Technology, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece; Physics Department, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
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C. Galiotis Materials Science Department, University of Patras, 26504, Patras, Greece; FORTH/ICE-HT, Stadiou Street, 26504, Rion Patras, Greece
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S. Ves Physics Department, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
&
G. A. Kourouklis Physics Division, School of Technology, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
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Pages 131-135 | Received 26 Jul 2010, Accepted 10 Oct 2010, Published online: 15 Feb 2011
 
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Abstract

Raman spectroscopy is employed to study the high-pressure response of carbon nanofibers exhibiting a unique morphology of stacked, truncated conical graphene layers (cups) along the longitudinal fiber axis (stacked-cup carbon nanofibers). The pressure evolution of the observed Raman peaks is smooth and reversible, and their pressure coefficients suggest an intermediate structural morphology between graphite and multiwall carbon nanotubes. The pressure coefficients are similar to those exhibited by the pressure-induced collapsed structures of large-diameter nanofibers and macroscopic fibers, suggesting the enhanced size-related rigidity of the studied system.

Acknowledgements

The authors thank Dr. M. Kollia for her technical assistance in TEM measurements and Grupo Antolin for providing the samples. K.P. and C.G. acknowledge financial support from the Marie-Curie Transfer of Knowledge program CNTCOMP (Contract No. MTKD-CT-2005-029876). Also, K.P. acknowledges the Research Committee of the University of Patras for financial support.

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