Graphene-based plasmonic biosensing

Surface plasmon resonance (SPR) is an established technique for label-free detection of trace amounts of adsorbents at a metal-dielectric interface [1]. In recent years much effort has been directed at increasing the detection limit of SPR [2]. Previous works [3,4] have in general focused on the use of gold nanoparticles for biosensing. The results of these studies have been promising but are limited in their potential application by the high costs associated with both nanofabrication techniques and gold itself.