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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Detalhes bibliográficos
Autores: Jorge, Guillermo Antonio, Bekeris, Victoria Isabel, Acha, Carlos Enrique, Escobar, M. M., Goyanes, Silvia Nair, Zilli, Dario Adrian, Cukierman, Ana Lea, Candal, Roberto Jorge
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2009
País:Argentina
Recursos:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/61386
Acesso em linha:http://hdl.handle.net/11336/61386
Access Level:acceso abierto
Palavra-chave:PHONON
MULTIWALL
CARBON NANOTUBES
MICROESTRUCTURE
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
Descrição
Resumo: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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