Optical Biosensors Based on Localized Surface Plasmon Resonance Effect

Noble metal nanoparticles exhibit excellent properties compared to the conventional bulk elements, and the localized surface plasmon resonance (LSPR) has become one of the research hot points. The shape and position of LSPR are mainly dependent on the composition, size, shape, dielectric properties, as well as the local dielectric environment of the metal nanoparticles. Based on this property, noble metal nanoparticles have been widely applied in optical biosensors, optical filters, and surface enhanced spectroscopies. In this paper, the preparation of various noble metal nanostructures and their applications in optical biosensors are reviewed. The future development prospects of LSPR nanosensors are also present.