Graphene Gold Au@Ag NPs PDMS Films Coated Fiber Optic for Refractive Index and Temperature Sensing
A novel fiber optic refractive index (RI) and temperature sensor based on a multimode single mode multimode fiber (MMF SMF MMF) structure coated with graphene metal hybrid films was proposed and investigated. The surface plasmon resonance (SPR) based RI sensitivity is improved by the addition of the graphene layer above or below the gold coating of the fiber and then further enhanced with the addition of gold silver core shell nanoparticles (Au@Ag NPs) Furthermore, the surface of graphene Au Au@Ag NPs film was modified with polydimethylsiloxane (PDMS) for temperature sensing, achieving a high sensitivity of 1.02 nm/degC with good repeatability. This new structure with graphene gold Au@Ag NPs PDMS hybrid films shows applications in many fields, including environmental protection, clean energy, and nano medicine.
IEEE Photonics Technology Letters