Effects of phonon dimensionality in the specific heat of multiwall carbon nanotubes at low temperatures

We have measured the specific heat at constant pressure, Cp, of three different samples of multiwall carbon nanotubes (MWNT). For all samples, Cp departs from a graphitic behavior at T < 120 K. Cp measurements show a temperature threshold from a linear regime for intermediate temperature to a hig...

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Bibliographic Details
Authors: Jorge, Guillermo Antonio, Bekeris, Victoria Isabel, Acha, Carlos Enrique, Escobar, M. M., Goyanes, Silvia Nair, Zilli, Dario Adrian, Cukierman, Ana Lea, Candal, Roberto Jorge
Format: article
Status:Published version
Publication Date:2009
Country:Argentina
Institution:Consejo Nacional de Investigaciones Científicas y Técnicas
Repository:CONICET Digital (CONICET)
Language:English
OAI Identifier:oai:ri.conicet.gov.ar:11336/61386
Online Access:http://hdl.handle.net/11336/61386
Access Level:Open access
Keyword:PHONON
MULTIWALL
CARBON NANOTUBES
MICROESTRUCTURE
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
Description
Summary:We have measured the specific heat at constant pressure, Cp, of three different samples of multiwall carbon nanotubes (MWNT). For all samples, Cp departs from a graphitic behavior at T < 120 K. Cp measurements show a temperature threshold from a linear regime for intermediate temperature to a higher-order power law for low temperatures. Moreover, it was found that this crossover only depends on the internal structure of the individual MWNT and not on the spatial order of the MWNT within a bundle. © 2009 IOP Publishing Ltd.

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