Multifunctional N,S-doped and methionine functionalized carbon dots for on-off-on Fe³⁺ and ascorbic acid sensing, cell imaging, and fluorescent ink applying.

ABSTRACT: Fluorescent carbon dots (CDs) have been identified as potential nanosensors and attracted tremendous research interests in wide areas including anti-counterfeiting, environmental and biological sensing and imaging in considering of the attractive optical properties. In this work, we present a CDs based fluorescent sensor from polyvinylpyrrolidone, citric acid, and methionine as precursors by hydrothermal approach. The selective quantifying of Fe³⁺ and ascorbic acid (AA) are based on the fluorescent on-off-on process, in which the fluorescent quenching is induced by the coordination of the Fe³⁺ on the surface of the CDs, while the fluorescence recovery is mainly attributed to redox reaction between Fe³⁺ and AA, breaking the coordination and bringing the fluo

SUBMITTER: Yang Z 

PROVIDER: S-EPMC9643953 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature