Exciton-Plasmon Interactions between CdS Quantum Dots and Ag Nanoparticles in Photoelectrochemical System and Its Biosensing Application
2012; American Chemical Society; Volume: 84; Issue: 14 Linguagem: Inglês
10.1021/ac300127s
ISSN1520-6882
AutoresWeiwei Zhao, Peipei Yu, Yun Shan, Jing Wang, Jing‐Juan Xu, Hong‐Yuan Chen,
Tópico(s)Gold and Silver Nanoparticles Synthesis and Applications
ResumoWith DNA as a rigid spacer, Ag nanoparticles (NPs) were bridged to CdS quantum dots (QDs) for the stimulation of exciton-plasmon interactions (EPI) in a photoelectrochemical (PEC) system. Due to their natural absorption overlap, the exciton of the QDs and the plasmon of Ag NPs could be induced simultaneously. The EPI resonant nature enabled manipulating photoresponse of the QDs via tuning interparticle distances. Specifically, the photocurrent of the QDs could be greatly attenuated and even be completely damped by the generated EPI. The work opens a different horizon for EPI investigation through an engineered PEC nanosystem, and provides a viable mechanism for new DNA sensing protocol.
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