Dual-Emission Fluorescence Probe Based on CdTe Quantum Dots and Rhodamine B for Visual Detection of Mercury and Its Logic Gate Behavior.

ABSTRACT: It is urgent that a convenient and sensitive technique of detecting Hg²⁺ be developed because of its toxicity. Conventional fluorescence analysis works with a single fluorescence probe, and it often suffers from signal fluctuations which are influenced by external factors. In this research, a novel dual-emission probe assembled through utilizing CdTe quantum dots (QDs) and rhodamine B was designed to detect Hg²⁺ visually. Only the emission of CdTe QDs was quenched after adding Hg²⁺ in the dual-emission probe, which caused an intensity ratio change of the two different emission wavelengths and hence facilitated the visual detection of Hg²⁺. Compared to single emission QDs-based probe, a better linear relationship was shown between the variation of

SUBMITTER: Gao Y 

PROVIDER: S-EPMC8234752 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature