期刊论文

Xingbo Shi

英文

Microchemical Journal

0026-265X

2023

190

108625

10.1016/j.microc.2023.108625

CRediT authorship contribution statement Qian Zhao: Conceptualization, Methodology, Formal analysis, Writing – review & editing. Yang Li: Methodology, Formal analysis, Writing – original draft. Wei Wei: Methodology, Formal analysis. Juan Huang: Methodology, Visualization, Formal analysis. Dai Lu: Methodology, Visualization, Formal analysis. Shigang Liu: Validation, Formal analysis. Xingbo Shi: Conceptualization, Methodology, acquisition, Project administration, Supervision.

本校为第一机构

In this study, a ratiometric fluorescence-based colorimetric sensor was developed for the portable analysis of antioxidant capacity (AOC) using a smartphone. The sensor used carbon dots (CDs) and o-phenylenediamine (OPD) as fluorescence signal substrate and manganese dioxide nanosheets (MnO2 NSs) as a fluorescence quencher, a catalyst of the substrate. Without a target, MnO2 NSs effectively quench the fluorescence of the CDs via inner filter effect and could catalyze the oxidization of nonfluorescent OPD, forming a yellow fluorescent product (ox-OPD). With a target, MnO2 NSs were destructed in...