High-Performance Dual Cavity-Interferometric Volatile Gas Sensor Utilizing Graphene/PMMA Nanocomposite

•Dual-cavity Fabry-Perot interferometer utilized with graphene, PMMA and graphene/PMMA is demonstrated for VOCs detection.•The experimental results are best fitted with models based on Langmuir adsorption isotherm and Hansen solubility parameters.•Sensing mechanism is based on change in their swelling/refractive index under exposure of VOCs.•A simple, flexible design makes it attractive for many industrial applications and environmental monitoring.