High-temperature electrical transport properties of buckypapers composed of doped single-walled carbon nanotubes

Kulesza, Sławomir; Szroeder, Paweł; Patyk, J.; Szatkowski, J.; Kozanecki, Marcin

doi:10.1016/j.carbon.2006.03.012

Cited by 21 publications

(17 citation statements)

References 17 publications

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“…Activation energies, calculated for all specimens well above percolation threshold, are essentially independent of MWCNT filler content. These values are in good agreement with previously published results [36]. The vertical lines presented in Fig.…”

Section: Composites With Mwcnt Concentration Above P Csupporting

confidence: 93%

Dielectric Spectroscopy and Tunability of Multi-Walled Carbon Nanotube / Epoxy Resin Composites

Špitálský

Georga

Krontiras

et al. 2010

Advanced Composites Letters

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The dielectric response of oxidized multi-walled carbon nanotube / epoxy resin composites, is investigated with respect to filler content concentration, over a wide temperature and frequency range. Specimens, below the percolation threshold, exhibit similar behaviour to that of the neat epoxy. Two relaxation modes are observed in the low temperature region, attributed to the rearrangement of small parts of the polymer chain (γ-mode) and the reorientation of polar side groups (β-mode) respectively, where in the high temperature region the evolution of the α-mode is present. Direct current (DC) conduction follows the Vogel-Tamann-Fulcher equation as expected. The dielectric response of specimens, above the percolation threshold, follows the "Random Free Energy Barrier Model". DC conductivity exhibits Arrhenius temperature dependence with two distinct regions. The activation energies of both regions were evaluated. The contact resistance between two adjacent carbon nanotubes was also calculated. The effective dielectric constant as well as the capacitance of the specimens, above the percolation threshold, can be modulated by means of an applied DC bias voltage.

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Section: Composites With Mwcnt Concentration Above P Csupporting

confidence: 93%

Dielectric Spectroscopy and Tunability of Multi-Walled Carbon Nanotube / Epoxy Resin Composites

Špitálský

Georga

Krontiras

et al. 2010

Advanced Composites Letters

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“…The probable reason is higher MWCNT volume fraction and compactness of filtered MWCNT network with respect to powdery CNT layer investigated in [5]. The best description of the data in Fig.15 is obtained by the series heterogeneous model when the resistance is described as the sum of metallic (MWCNT are regarded as metallic conductors) and barrier portions of conduction path [21][22][23] …”

Section: Mwcnt Network and Contact Resistancementioning

confidence: 99%

Electromechanical Sensors Based on Carbon Nanotube Networks and Their Polymer Composites

Slobodian

Riha

Olejník

2011

Lecture Notes in Electrical Engineering

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Abstract.A network of entangled multiwall carbon nanotubes and the composite consisting of filter-supported multiwall carbon nanotube network are conductors whose conductivity is sensitive to compressive stress both in the course of monotonic stress growth and when loading/unloading cycles are imposed. The testing has shown as much as 100% network conductivity increase at the maximum applied stress. The entangled carbon nanotube networks are prepared by vacuum filtration method and peeled off from the filter. The carbon nanotubes are used in pristine condition or chemically functionalized. The filtersupported entangled networks are prepared by the nanotube dispersion filtration through a non-woven flexible polystyrene filter. The nanotubes infiltrate partly into the filter surface pores and link the accumulated filtrate layer with the filtering mat. The filter-support increases nanotube network mechanical integrity, the composite tensile ultimate strength and affects favorably the composite electrical resistance. Other obvious effect of the supporting polymer is reduction of the resistance temperature dependence. Moreover, the conductivity of carbon nanotube networks manifests also organic vapor dependence. The dependence is reversible, reproducible, selective as well as influenced by nanotube oxidation.

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“…Furthermore, a slight increase in resistivity is detected at 523 K. These results lead us to infer that the electrical transport in these materials is a balance between semiconductor and metallic-like mechanisms, whose weights depend on both the temperature and the MWCNTs content. It should be noticed that both kinds of charge transport mechanisms have been reported for individual carbon nanotubes [21] and buckypapers [22].…”

Section: Resultsmentioning

confidence: 99%

Multi-scale electrical response of silicon nitride/multi-walled carbon nanotubes composites

González‐Julián

Iglesias

Caballero

et al. 2011

Composites Science and Technology

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High-temperature electrical transport properties of buckypapers composed of doped single-walled carbon nanotubes

Cited by 21 publications

References 17 publications

Dielectric Spectroscopy and Tunability of Multi-Walled Carbon Nanotube / Epoxy Resin Composites

Dielectric Spectroscopy and Tunability of Multi-Walled Carbon Nanotube / Epoxy Resin Composites

Electromechanical Sensors Based on Carbon Nanotube Networks and Their Polymer Composites

Multi-scale electrical response of silicon nitride/multi-walled carbon nanotubes composites

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