Semantic Scholar Open Access 2002 751 sitasi

Experimental observation of scaling laws for alternating current and direct current conductivity in polymer-carbon nanotube composite thin films

B. Kilbride J. Coleman J. Fraysse P. Fournet M. Čadek +4 lainnya

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Abstrak

Alternating current (ac) and direct current (dc) conductivities have been measured in polymer-nanotube composite thin films. This was carried out for a range of concentrations of multiwall nanotubes in two polymer hosts, poly(m-phenylenevinylene-co-2,5-dioctyloxyp-phenylenevinylene) (PmPV) and polyvinylalcohol (PVA). In all cases the dc conductivity σDC was ohmic in the voltage range studied. In general the ac conductivity displayed two distinct regions, a frequency independent region of magnitude σ0 at low frequency and a frequency dependent region at higher frequency. Both σDC and σ0 followed a percolation scaling law of the form σ∝(p−pc)t with pc=0.055% by mass and t=1.36. This extrapolates to a conductivity of 1×10−3 S/m for 100% nanotube content. Such a low value reflects the presence of a thick polymer coating, resulting in poor electrical connection between tubes. This leads to the suggestion that charge transport is controlled by fluctuation induced tunneling. In the high frequency regime the cond...

Topik & Kata Kunci

Materials Science

Penulis (9)

B. Kilbride

J. Coleman

J. Fraysse

P. Fournet

M. Čadek

A. Drury

S. Hutzler

S. Roth

W. Blau

Format Sitasi

APA MLA BibTeX

Kilbride, B., Coleman, J., Fraysse, J., Fournet, P., Čadek, M., Drury, A. et al. (2002). Experimental observation of scaling laws for alternating current and direct current conductivity in polymer-carbon nanotube composite thin films. https://doi.org/10.1063/1.1506397

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Lihat di Sumber doi.org/10.1063/1.1506397

Informasi Jurnal

Tahun Terbit: 2002
Bahasa: en
Total Sitasi: 751×
Sumber Database: Semantic Scholar
DOI: 10.1063/1.1506397
Akses: Open Access ✓