authors |
Okhay, O; Goncalves, G; Dias, C; Ventura, J; Vieira, EMF; Goncalves, LMV; Tkach, A |
nationality |
International |
journal |
JOURNAL OF ALLOYS AND COMPOUNDS |
author keywords |
Graphene; Carbon nanotubes; Electrical conductivity; Seebeck coefficient; Nanocomposite |
keywords |
HYBRID FILMS; LARGE-AREA |
abstract |
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. (C) 2018 Elsevier B.V. All rights reserved. |
publisher |
ELSEVIER SCIENCE SA |
issn |
0925-8388 |
isbn |
1873-4669 |
year published |
2019 |
volume |
781 |
beginning page |
196 |
ending page |
200 |
digital object identifier (doi) |
10.1016/j.jallcom.2018.12.033 |
web of science category |
Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering |
subject category |
Chemistry; Materials Science; Metallurgy & Metallurgical Engineering |
unique article identifier |
WOS:000457845900021
|