The Quiet Revolution in Plasmonic Sensing Surface Plasmon Resonance (SPR) has long stood at the forefront of optical sensing technologies—renowned for its label-free detection, real-time analysis, and ultra-sensitivity to minute changes in the refractive index (RI) of nearby media. In biological, chemical, and environmental diagnostics, SPR sensors provide a reliable window into molecular interactions, gas-phase […]
Surface plasmon resonance (SPR) refers to the resonant oscillation of conduction electrons at a metal–dielectric interface excited by incident electromagnetic radiation under specific momentum-matching conditions. Surface plasmon–based sensors exploit this phenomenon to detect minute changes in the refractive index near the sensor surface, enabling highly sensitive, label-free detection. Within the broader category of plasmonic sensing, […]
Introduction Surface Plasmon Resonance (SPR) sensors represent a vital class of label-free biosensors that are fundamentally transforming real-time molecular detection. Relying on the interaction of light with metal surfaces to generate plasmons—coherent electron oscillations at the interface—SPR systems detect changes in the refractive index near the sensor surface, typically induced by biomolecular interactions. This optical […]
