Electro-sprayed PVA coating with texture-enriched surface morphology for augmented humidity sensing

Abstract

This article reports the modified surface morphology of Poly-vinyl Alcohol (PVA) films using electro-spraying coating technique. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) were conducted to examine the surface structure of the prepared PVA films. Intriguingly, the novel 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. Owing to the unique surface assembly, the electro-sprayed humidity sensor showed superior performance as compared to the electro-spun PVA based humidity sensor. - 2017 Elsevier B.V.