Luminescence turn-off and turn-on interaction mechanism of optical probe with hydrogen peroxide

被引：4

作者：

Bishnoi, Swati ^{[1
]}

Acharyya, Jitendra Nath ^{[2
]}

Prakash, G. Vijaya ^{[2
]}

Pattanayek, Sudip K. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem Engn, Delhi 110016, India

[2] Indian Inst Technol Delhi, Dept Phys, Nanophoton Lab, New Delhi 110016, India

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2023年 / 295卷

关键词：

Luminescence; MnO2; nanosheets; Positively charged carbon dots; Turn-on probe; SENSITIVE DETECTION; CARBON DOTS; FLUORESCENT SENSOR; PHASE-CHANGE; H2O2; NANOPARTICLES; CELLS; PERFORMANCE; ELECTRODES; CONVERSION;

D O I：

10.1016/j.matchemphys.2022.127178

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The mechanism of interaction between luminescent positively charged Carbon dots (CDs) and manganese di-oxide (MnO2) based optical probes and hydrogen peroxide (H2O2) has been investigated. The optical probe has the mechanism of luminescence turn-off and on, which enables the detection of H2O2. MnO2 nanosheets can quench CDs luminescence due to spectral overlap between CDs emission and MnO2 absorption. As a result of the underlying detailed redox reaction mechanism, the initial quenched probe exhibits luminescence activation upon exposure to H2O2 solution. The quenched probe begins to regain the luminescence that increases as the con-centration of H2O2 increases (0.1-12 mu M). The Johnson-Mehl-Avrami-Kolmogorov model was used to investigate the luminescence turn-on mechanism further.

引用

页数：9

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