Smartphone based LSPR biosensor

We demonstrated a fiber optic localized surface plasmon resonance (FO-LSPR) biosensor based on smartphone platform. By immobilizing gold nanoparticles (GNPs) on an unclad portion of optical fiber probe, we developed a kind of LSPR sensor of GNPs. Transmission intensity variation at the end face of FO-LSPR sensor was monitored in real time using a smartphone. The sensor prototype provide linear response with 3.8×10
^-5
RIU resolution in a refractive index (RI) range of 1.333-1.403. This biosensor device can be further developed for universal promising applications in public health and environmental monitoring.