Carbon nanotubes films for sensing applications: From piezoresistive sensor to gas sensing
Di Carlo A
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In this work we present the study of the sensing properties of Carbon nanotube films. We show the realization of deformation sensors based on composite CNT-polymer films realized by electrochemical deposition starting from a dispersion of SWCNTs and EDOT monomer. The gauge factor (GF) of the sensors has been found to be up to 3–4 times higher than that of the commercial strain gauge. We show also that the CNT have gas sensing properties, that can be applied to different gases, included H2O in gaseous form. Detection can be optimized by means of electrostatic polarization of the film substrate.