Tuning the electrical conductivity of exfoliated graphite nanosheets nanofluids by surface functionalization

The electrical conductivity of exfoliated graphite in water nanofluids has been experimentally determined, and compared with the same property when the dispersed nanosheets have been oxidized. The effect of oxidation on this property is different if compared with the case of sintered dry nanosheets....

Full description

Saved in:
Bibliographic Details
Published inSoft matter Vol. 13; no. 18; pp. 3395 - 343
Main Authors Hermida-Merino, C, Pérez-Rodríguez, M, Piñeiro, M. M, Pastoriza-Gallego, M. J
Format Journal Article
LanguageEnglish
Published England 14.05.2017
Subjects
Electrical conductivity
Electrical resistivity
Graphite
Nanofluids
Nanostructure
Oxidation
Raw materials
Sintering
Online AccessGet full text

Cover

More Information
Summary:The electrical conductivity of exfoliated graphite in water nanofluids has been experimentally determined, and compared with the same property when the dispersed nanosheets have been oxidized. The effect of oxidation on this property is different if compared with the case of sintered dry nanosheets. In any case, for the sintered raw material the conduction behaves as expected in a metal, while for the nanofluid it shows values and trends typical of a weak electrolyte solution. The effect of oxidation on the electrical conductivity of exfoliated graphite can be explained as being caused by the dissociation in the fluid phase of the moieties resulting from the chemical functionalization process. This opens the possibility of designing a functionalization process to tune the nanofluid electrical conductivity. The electrical conductivity of exfoliated graphite in water nanofluids has been experimentally determined, and compared with the same property when the dispersed nanosheets have been oxidized.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1744-683X
1744-6848
DOI:10.1039/c7sm00218a