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Single‐Atomic Iron Doped Carbon Dots with Both Photoluminescence and Oxidase‐Like Activity by Xin Li; Shichao Ding; Zhaoyuan Lyu; Peter Tieu; Maoyu Wang; Zhenxing Feng; Xiaoqing Pan; Yang Zhou; Xiangheng Niu; Dan Du; Wenlei Zhu; Yuehe Lin is a Engineering article available to read on EtoBox.

What is Single‐Atomic Iron Doped Carbon Dots with Both Photoluminescence and Oxidase‐Like Activity about?

Multifunctional nanozymes can benefit biochemical analysis via expanding sensing modes and enhancing analytical performance, but designing multifunctional nanozymes to realize the desired sensing of targets is challenging. In this work, single-atomic iron doped carbon dots (SA Fe-CDs) are designed and synthesized via a facile in situ pyrolysis process. The small-sized CDs not only maintain their tunable fluorescence, but also serve as a support for loading dispersed active sites. Monoatomic Fe offers SA Fe-CDs exceptional oxidase-mimetic activity to catalyze 3,3',5,5'-tetramethylbenzidine (TMB) oxidation with fast response (V = 10.4 nM s ) and strong affinity (K = 168 μM). Meanwhile, their photoluminescence is quenched by the oxidation product of TMB due to inner filter effect. Phosphate ions (Pi) can suppress the oxidase-mimicking activity and restore the photoluminescence of SA Fe-CDs by interacting with Fe active sites. Based on this principle, a dual-mode colorimetric and fluorescence assay of Pi with high sensitivity, selectivity, and rapid response is established. This work paves a path to develop multifunctional enzyme-like catalysts, and offers a simple but efficient dual

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Author

Xin Li; Shichao Ding; Zhaoyuan Lyu; Peter Tieu; Maoyu Wang; Zhenxing Feng; Xiaoqing Pan; Yang Zhou; Xiangheng Niu; Dan Du; Wenlei Zhu; Yuehe Lin

Publisher

Wiley

Published

2022

Language

EN

Field

Engineering (Physical Sciences)