Abstract

For nanoparticles with adsorbed chromophores, when the absorption bands of chromophores are overlapped with the resonance scattering bands of particles, “plasmon resonance energy transfer” (PRET) from metal nanoparticles to the surface-modified chromophores occurs. PRET enhances the sensitivity of absorption signals of chromophores with several orders of magnitudes. In this chapter, we discuss the discovery of PRET as well as its applications in ultrasensitive sensors.

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