Atomic force microscopy (AFM) was conducted to examine the surface structure of the prepared PVA films. Fascinatingly, the new micro-level developed surface, twisted by electro-spraying is very promising for humidity sensors. The resistivity of the humidity sensors was measured under controlled humidity levels. Due to the unique surface assembly, the electro-sprayed humidity sensor showed better performance as compared to the electro-spun PVA based humidity sensor. For the full article, please visit: