title: Exciton-plasmon interactions between CdS quantum dots and Ag nanoparticles in photoelectrochemical system and its biosensing application.
abstract: With 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.
authors: State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
authors: Wei-Wei
authors: WW
authors: Zhao
authors: Pei-Pei
authors: PP
authors: Yu
authors: Yun
authors: Y
authors: Shan
authors: Jing
authors: J
authors: Wang
authors: Jing-Juan
authors: JJ
authors: Xu
authors: Hong-Yuan
authors: HY
authors: Chen
mesh_terms: D015374:Biosensing Techniques / Q000379:methods*; D019187:Cadmium Compounds / Q000737:chemistry*; D004247:DNA / Q000032:analysis / Q000737:chemistry; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D053768:Metal Nanoparticles / Q000737:chemistry*; D055668:Photochemical Processes; D045663:Quantum Dots; D012834:Silver / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D013440:Sulfides; C034939:cadmium sulfide; D012834:Silver; D004247:DNA