A Mn:ZnSe quantum dot-based turn-on fluorescent sensor for the highly selective and sensitive detection of Cd2+

Autor:	Qi Xiao, Yuan-Ping Liao, Li-Yun Yang, Zhi-Qiang Zhou, Xiao-Hui Zhou, Yi Liu, Hui-Yan Wu, Shan Huang
Rok vydání:	2020
Předmět:	Detection limit Turn (biochemistry) Ionic radius Materials science Quantum dot General Chemical Engineering General Engineering Nanoprobe Photochemistry Selectivity Fluorescence Analytical Chemistry Nanomaterials
Zdroj:	Analytical Methods. 12:552-556
ISSN:	1759-9679 1759-9660
DOI:	10.1039/c9ay02445j
Popis:	A highly selective and sensitive nanoprobe with fluorescence turn-on sensing properties for recognizing Cd2+ was developed through replacing Mn2+ near the surface of Mn:ZnSe quantum dots (QDs). The similar ionic radii of Cd2+ and Zn2+ make the replacement of superficial Zn2+ by Cd2+ possible, followed by the replacement of external Mn2+ by Cd2+. Thus, this fluorescence turn-on strategy possesses great selectivity for the determination of Cd2+. Based on this strategy, the limit of detection (LOD) for Cd2+ is 18 nM, which is superior to the LOD of most reported fluorescent nanomaterial-based probes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d64b89cec019a1f32c194c008b20a018 https://doi.org/10.1039/c9ay02445j Zobrazit plný text záznamu