Piezoresistive effect in spin-coated polyaniline thin films

Abstract

Polymeric materials have been replacing other materials in various applications, from structural to electronic components. In particular, since the discovery of conducting polymers, the use of these materials is growing up in the manufacture of electronic components, such as organic lightemitting diodes, organic electrodes, energy storage devices and artificial muscles, among others. On the other hand, examples of sensors of conductive polymers based on the piezoresistive effect, with large potential for applications, are not sufficiently investigated. This work reports on the piezoresistive effect of an intrinsically conductive polymer, polyaniline, which was prepared in the form of thin films by spin coating on polyethylene terephthalate substrates. The relationship between electrical response and mechanical solicitations is presented for different preparation conditions. The values of the gauge factor ranges from 10 to 22 for different samples and demonstrates the viability of these materials as piezoresistive sensors.

Mechanical behavior of strain sensors based on PEDOT:PSS and silver nanoparticles inks deposited on polymer substrate by inkjet printing

“…Therefore, they are used in many different fields, and not least, in the biomedical field [9]. Novel systems have been recently developed adopting polymers instead of the more conventional strain gauges, leading to sensors based on conductive polymers [10], polymer composites [11], polymer elastomers [12], thermoplastics [12], epoxies [13]. As a benefit, sensors based on polymers allow the use of conventional and convenient polymer processing and postprocessing techniques.…”

TiAgx thin films for lower limb prosthesis pressure sensors: Effect of composition and structural changes on the electrical and thermal response of the films

“…properties [8], that should provide a good response for both low and high magnitude mechanical pressures that are expected to arise in the limb prosthesis when used by the amputee [5,[8][9][10][11][12][13].…”

A molecular view on a polyaniline–TiO2 nanostructured thin film: Effect of temperature and pressure on the thermal, mechanical, and dynamical properties

“…(2) The measured Young's modulus values were about three times higher than the shear modulus. (3) The Poisson ratio was approximated by 0.37, which is a reasonable value for polymers reported in the literature [53].…”