Self-Referenced Smartphone Imaging for Visual Screening of H₂S Using CuxO-Polypyrrole Conductive Aerogel Doped with Graphene Oxide Framework

High Resolution Image Download MS PowerPoint Slide Cu x O-polypyrrole conductive aerogel loaded on graphene oxide framework (Cu x O-PPy@GO) with a three-dimensional (3D) porous architecture was utilized for high-efficient visual screening of H 2 S on a flexible paper substrate. The detectable signal was acquired on a portable smartphone by using a self-referenced imaging platform equipped with the light emitting diode (LED) accompanying an image processing. As a proof-of-concept, Cu x O-PPy@GO aerogel-based sensing strategy was also developed for Na 2 S detection and egg spoilage monitoring. Such a flexible paper-supported sensor is expected for potential application in portable and wearable food-safety fields.