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Percolation effect and thermoplasticity of conducting [poly(acrylic acid)/CTAB-modified graphene oxide] multilayer films.
- Source :
-
Journal of Materials Science . Feb2013, Vol. 48 Issue 4, p1843-1851. 9p. 1 Black and White Photograph, 2 Charts, 7 Graphs. - Publication Year :
- 2013
-
Abstract
- The feasibility and effectiveness of the electrostatic self-assembly technique are demonstrated for the fabrication of thermoplastically conducting multilayer films. The layer-by-layer self-assembly process is based on the alternating adsorption of low molecular weight (Mn) poly(acrylic acid) (PAA) and cetyltrimethyl-ammonium bromide-modified graphene oxide (GO) with three carbon layers. A unique conductivity percolation effect is observed at a percolation threshold (percolation bilayer number) because the carbon-carbon interlayer can be expanded by the diffusion of PAA molecular chains. The resultant multilayer films show typical positive/negative temperature coefficient effects because of the thermoplasticity of the PAA with low Mn. After being reduced from GO to graphene (G), the electrical conductivity of the resulting (PAA/G)n multilayer film is dramatically enhanced, and the percolation threshold occurs at a high bilayer number. The reasonable conductivities and the percolation effect make these films inherently interesting and potentially useful as components of advanced electronic devices. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00222461
- Volume :
- 48
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Journal of Materials Science
- Publication Type :
- Academic Journal
- Accession number :
- 84581733
- Full Text :
- https://doi.org/10.1007/s10853-012-6950-9