Tuning electrical and thermoelectric properties of freestanding graphene oxide papers by carbon nanotubes and heat treatment

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019

Autores

Okhay, O (Autor) Outra; Goncalves, G (Autor) Outra; Dias, C (Autor) Outra; ventura, j. (Autor) FCUP; Vieira, EMF (Autor) Outra; Goncalves, LMV (Autor) Outra; Tkach, A (Autor) Outra

Revista

Título: Journal of Alloys and Compounds

Vol. 781

Páginas: 196-200

ISSN: 0925-8388

Editora: Elsevier

Indexação

ISI Web of Knowledge - 6 Citações

Scopus - 8 Citações

Outras Informações

ID Authenticus: P-00Q-57B

DOI: 10.1016/j.jallcom.2018.12.033

Abstract (EN): Electrical conductivity and Seebeck coefficient of freestanding paper of graphene oxide (GO) and GO reduced by heat treatment at 180 degrees C (rGO) are tuned by addition of carbon nanotubes (CNT). The electrical conductivity of rGO with 50% of CNT is raised to similar to 2940 S/m from similar to 613 S/m for pure rGO or similar to 34 S/m for GO with 50% of CNT without reduction. Moreover, Seebeck coefficient of rGO increases with addition of CNT from -7.04 mu V/K for pure rGO to -20.82 mu V/K for rGO with 50% of CNT, presenting n-type conductivity. As result, calculated power factor PF is enhanced with increasing CNT concentration and the highest PF similar to 1.28 mu W/(K(2)m) is obtained for rGO with 50% of CNT.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5