1. Electroactive Au@Ag nanoparticles driven electrochemical sensor for endogenous H2S detection.
- Author
-
Zhao, Yuan, Yang, Yaxin, Cui, Linyan, Zheng, Fangjie, and Song, Qijun
- Subjects
- *
ELECTROCHEMICAL sensors , *CHEMICAL detectors , *GOLD nanoparticles , *OXIDATION-reduction reaction , *DIFFERENTIAL pulse code modulation - Abstract
In this work, a novel and facile electrochemical sensor is reported for the highly selective and sensitive detection of dissolved hydrogen sulfide (H 2 S), attributing to the redox reaction between Au@Ag core-shell nanoparticles (Au@Ag NPs) and H 2 S. Electroactive Au@Ag NPs not only possess excellent conductivity, but exhibit great electrochemical reactivity at 0.26 V due to the electrochemical oxidation from Ag° to Ag + . In the presence of H 2 S, the Ag shell of Au@Ag NPs can be oxidized to Ag 2 S, resulting in the decrease of differential pulse voltammetry (DPV) peak at 0.26 V. The electrochemical sensor exhibits a wide linear response range from 0.1 nM to 500 nM. The limit of detection (LOD) for H 2 S is as low as 0.04 nM. The developed sensor shows significant prospects in the study of pathological processes related to the mechanism of H 2 S production. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF