Coefficient of thermal expansion of carbon nanotubes measured by Raman spectroscopy

Libo Deng, Robert J. Young, Ian A. Kinloch, Rong Sun, Guoping Zhang, Laure Noé, Marc Monthioux

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The coefficient of thermal expansion (CTE) of peapod-derived double-walled carbon nanotubes and their host empty single-walled carbon nanotubes (SWCNTs) was determined using Raman spectroscopy. This was performed by measuring the dependence of Raman band frequency of the nanotubes in epoxy resin matrix composites and considering the effects of both the strain and temperature on the Raman bands. Both types of nanotubes show positive thermal expansion at room temperature of around +2×10-5 K-1, and the CTE of the SWCNTs was unaffected by the introduction of the inner wall nanotubes. It was also demonstrated that the temperature-induced Raman band shifts can be used to determine both the CTE and glass transition temperature of the matrix polymers. © 2014 AIP Publishing LLC.
    Original languageEnglish
    Article number051907
    JournalApplied Physics Letters
    Volume104
    Issue number5
    DOIs
    Publication statusPublished - 2014

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