Abstract
Covering polycarbonate films with the strain sensing molecular metal α-(BEDT-TTF)2I3 [BEDT-TTF =bis(ethylenedithio)tetrathiafulvalene] was studied at different temperatures. It was shown that depending on the temperature of the covering process the conductive strain sensing layers demonstrate different electric transport properties: they vary from metallic to semiconductor-like temperature behavior. However, the electromechanical properties of all films reveal the same strain sensitivity with gauge factors about 10. This result permitted engineering highly strain sensing films with a very low temperature coefficient of resistance (TCR). Therefore, both of the electric and electromechanical properties of these bi layer (BL) films make them very attractive as flexible, durable, low-cost, all-organic strain (pressure) sensors that are able to replace conventional physical sensors in biomedical high-tech.
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