New Developments and Applications in Sensing Technology

0359749 - ÚH 2012 RIV DE eng M - Monography Chapter
Slobodian, P. - Říha, Pavel - Olejník, R.
Electromechanical sensors based on carbon nanotube networks and their polymer composites.
New Developments and Applications in Sensing Technology. 1. Berlin: Springer, 2011 - (Mukhopadhyay, S.; Lay-Ekuakille, A.; Fuchs, A.), s. 233-251. Lecture Notes in Electrical Engineering, 83. ISBN 978-3-642-17942-6
R&D Projects: GA AV ČR IAA200600803
Grant - others:Interní grantová agentura UTB(CZ) IGA/12/FT/10/D
Institutional research plan: CEZ:AV0Z20600510
Keywords : carbon nanotube network * compression * electrical conductivity * stress sensor * gas sensor
Subject RIV: JB - Sensors, Measurment, Regulation

A network of entangled multiwall carbon nanotubes and the composite consisting of polystyrene 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 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 and selective as well as influenced by nanotube oxidation.
Permanent Link: http://hdl.handle.net/11104/0197471