Results
Title

Ratiometric fluorescence sensor based on carbon quantum dots for visual detection of hypochlorite ions.

Authors

Lu, Yifei; Wang, Sui; Guo, Zhiyong; Hu, Yufang

Abstract

A ratiometric fluorescence sensor (c-CDs/Ru(bpy)32+) based on the selective recognition of chitosan carbon dots (c-CDs) on ClO− and combine with Ru(bpy)32+ was established for sensitive and visual monitoring of hypochlorite ion (ClO−). Using this nanosensor, a highly sensitive assay of ClO− in the linear range of 0.026 − 70 μM with a low detection limit (LOD) of 8.6 nM was provided by quenching the blue emission fluorescence. It is more attractive that ClO− can also be visualized by this nanosensor via evident color changes of the solution (from blue to red) under an ultraviolet (UV) lamp. In addition, since c-CDs and Ru(bpy)32+ have good water dispersibility and water solubility, respectively, the sensor can be applied to the detection of HClO in 100% aqueous solution. This is a new colorimetric and fluorescent dual-mode nanosensor with more simple preparation procedures, low cost, and excellent biocompatibility. It provides a new method for detecting ClO− and promotes the development of biosensing.

Subjects

QUANTUM dots; FLUORESCENCE; DETECTORS; FLUORESCENCE quenching; DETECTION limit; IONS; ELECTROCHEMILUMINESCENCE

Publication

Journal of Nanoparticle Research, 2022, Vol 24, Issue 1, p1

ISSN

1388-0764

Publication type

Academic Journal

DOI

10.1007/s11051-021-05388-x