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Updated: May 29, 2025
Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
Published on: March 2, 2016
Synergistic Enhancement of Fluorescence Through Plasmon Resonance and Interfacial Charge Transfer by AgNC@AgAux
Youlong Chen1, Yihua Hu1, Yushuang Zhang1
1State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Key Laboratory of Electronic Restriction of Anhui Province, Advanced Laser Technology Laboratory of Anhui Province, National University of Defense Technology, Hefei, 230037, P. R. China.
Abstract:
Bimetallic core-shell quantum dots (QDs) hold great promise in elucidating the bimetallic synergism and optoelectronic devices. The synthesis and properties of AgNC@AgAux QDs of core-shell heterostructure are reported. Significantly enhanced photoluminescence emission on these heterostructures is observed. These enhancements are attributed to electron injection and the surface plasmon-induced strong local electric field, which are observed through time-resolved transient absorption spectroscopy. X-ray absorption near edge structure spectra and density functional theory confirms the electron injection from the Ag core to the AgAux shell. On the other hand, the plasmon resonance of the AgNC@AgAux QDs has been studied by finite-element method analysis and time-resolved photoluminescence spectra. There are 94.06 times fluorescence enhancement and 32.40 times quantum yield improvement of oxygen content correlation compared to AgAu3 QDs. It shows a perfect correlation coefficient of 98.85% for the detection of heavy metal Cu2+ ions. Such Bimetallic core-shell heterostructures have great potential for future optoelectronic devices, optical imaging, and other energy-environmental applications.
