pH-responsive luminescent properties of Ag@PPy nanoparticles

Literature Information

Publication Date 2011-01-31
DOI 10.1039/C0CP02184A
Impact Factor 3.676
Authors

Sunjie Ye, Shujun Chen, Hongjuan Wang, Yun Lu


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Abstract

We measure the emission spectra and quantum yields of Ag@PPy nanoparticles with different volume ratios of Ag core and PPy shell, and ascribe the emission peaks around 460 and 520 nm, respectively, to the S1 → S0 transition of the PPy molecule, and to the charge transfer between Ag and PPy, as well as the Ag plasmon. The two peaks shift with the changed doping level of the PPy shell, which can be elucidated by consideration of the energy levels of Ag and PPy. According to these results, we investigate the fast and reversible pH-sensing function of Ag@PPy nanoparticles on the basis of the doping effect on the interaction between the Ag core and the PPy shell.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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