Thermal transport in three-dimensional foam architectures of few-layer graphene and ultrathin graphite.
Nano Lett
; 12(6): 2959-64, 2012 Jun 13.
Article
em En
| MEDLINE
| ID: mdl-22612725
ABSTRACT
At a very low solid concentration of 0.45 ± 0.09 vol %, the room-temperature thermal conductivity (κ(GF)) of freestanding graphene-based foams (GF), comprised of few-layer graphene (FLG) and ultrathin graphite (UG) synthesized through the use of methane chemical vapor deposition on reticulated nickel foams, was increased from 0.26 to 1.7 W m(-1) K(-1) after the etchant for the sacrificial nickel support was changed from an aggressive hydrochloric acid solution to a slow ammonium persulfate etchant. In addition, κ(GF) showed a quadratic dependence on temperature between 11 and 75 K and peaked at about 150 K, where the solid thermal conductivity (κ(G)) of the FLG and UG constituents reached about 1600 W m(-1) K(-1), revealing the benefit of eliminating internal contact thermal resistance in the continuous GF structure.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cristalização
/
Nanoestruturas
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Gases
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Grafite
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Membranas Artificiais
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article