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Electromechanical properties of carbon nanotube networks under compression
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SYSNO ASEP 0367353 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Electromechanical properties of carbon nanotube networks under compression Author(s) Slobodian, P. (CZ)
Říha, Pavel (UH-J) SAI, ORCID, RID
Olejník, R. (CZ)
Sáha, P. (CZ)Source Title Measurement Science and Technology. - : Institute of Physics Publishing - ISSN 0957-0233
Roč. 22, č. 12 (2011), s. 124006Number of pages 7 s. Language eng - English Country GB - United Kingdom Keywords carbon nanotube network ; compression ; electrical conductivity ; stress sensor Subject RIV JB - Sensors, Measurment, Regulation R&D Projects IAA200600803 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z20600510 - UH-J (2005-2011) UT WOS 000298148200008 DOI 10.1088/0957-0233/22/12/124006 Annotation The network of entangled multiwall carbon nanotubes and the composite consisting of polystyrene filter-supported nanotube network are introduced as 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. It indicates favorable properties of multiwall carbon nanotube network for its use as a stress-electric signal transducer. To model the conductivity-stress dependence, it is hypothesized that compression increases local contact forces between nanotubes. The lack of detailed knowledge of the mechanism as well as an unclear shift from individual contacts to the whole network conductance is circumvented with a statistical approach. In this respect, the conductivity/compression data were fitted well using Weibull distribution for the description of nanotube contact resistance distribution. Workplace Institute of Hydrodynamics Contact Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Year of Publishing 2012
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