General information about organic material gas sensors

The gas sensors based on organic materials make use of several dissimilar gas sensing principles in conjunction with suitable transducers.

Gaseous analyte sorption in the sensing material volume. The process is typically regarded as the solvation of the gas phase in the organic compound, considered to be a liquid phase due to its amorphous structure; it results in extensive material parameter (mass, dielectric constant, volume/thickness, etc.) changes. Because of the small solvation enthalpies associated to the sorption one also assesses its complete reversibility of the due to the small volume polymer

Our approach is to simultaneously use complementary spectroscopic and phenomenological methods on samples that are as close as possible to real sensors and in conditions as close as possible to the real sensors' working conditions, namely the operando approach.