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Quantum dots (QDs) have attracted extensive attention in biomedical applications, because of their broad excitation spectra, narrow and symmetric emission peaks etc. Furthermore, near-infrared (NIR) QDs have further advantages including low autofluorescence, good tissue penetration and low phototoxicity. In this work, the electrostatic interaction and fluorescence resonance energy transfer (FRET)...
Herein, a single luminophor dual-potential chemiluminescence (ECL) system based on nitrogen doped graphene quantum dots (NGQDs) was developed for ratiometric detection of Co2+ ion. Dissolved oxygen is changed to O2− and HO2− which participate in the anodic and cathodic ECL generating processes of NGQDs. Co2+ ion was demonstrated able to evidently amplify the anodic intensity by displaying catalytic...
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