Journal
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
Volume 414, Issue 9, Pages 3067-3075Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-022-03930-x
Keywords
Carbon dots; Gold nanoclusters; Ratiometric; Cu2+; Ag+
Funding
- Fundamental Research Funds for the Central Universities [N2020007]
- General Project of Natural Science Funds of Liaoning Province [2020-MS-082]
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In this study, cyan fluorescent carbon dots were prepared using the biomolecule glutathione and utilized to synthesize fluorescent gold nanoclusters for the analysis of Cu2+ and Ag+ ions. Test strips were successfully prepared for visual detection of these ions. Additionally, the synthesized gold nanoclusters exhibited peroxidase-like activity.
In this work, the biomolecule glutathione was used to prepare cyan fluorescent carbon dots (GSH@CDs) by a hydrothermal method. The GSH@CDs were adopted as the scaffolds to synthesize fluorescent gold nanoclusters (GSH@CDs-Au NCs) with two independent emission peaks at 430 nm and 700 nm. A fluorescent method for the Cu2+ and Ag+ ion assay was established based on the fluorescence quenching or enhancement at 700 nm of GSH@CDs-Au NCs. The fluorescent test strips were successfully prepared for visual detection of Cu2+ ions and Ag+ ions based on GSH@CDs-Au NCs. In addition, GSH@CDs-Au NCs were found to possess well peroxidase-like activity.
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