A stretchable humidity sensor based on a wrinkled polyaniline nanostructure

A stretchable humidity sensor which has mechanical stability has remained a challenging issue in stretchable electronics. Here, we report a novel stretchable nanostructured polyaniline humidity sensor. The sensor was fabricated by simple fabrication methods such as a pre-stretching process and self-assembly texturing process. The periodically wrinkled structure supported by microstructured elastomeric substrates provides an excellent stretchability. The micro-textured substrate was introduced for solving the crack problem by the Poisson effect as a stretchable sensor. The sensor maintains its humidity sensitivity well at different elongations. To the best of our knowledge, this is the first report of a stretchable humidity sensor.