Highly Sensitive and Selective Fluorescence "Turn-On" Detection of Pb (II) Based on FeO@Au-FITC Nanocomposite

Overview

Journal Molecules

Publisher MDPI

Specialty Biology

Date 2021 Jun 2

PMID 34073353

Citations 5

Authors

Yina Cai

Binxue Ren

Chifang Peng

Cunzheng Zhang

Xinlin Wei

Affiliations

Soon will be listed here.

Abstract

New nanocomposites, FeO@Au-FITC, were prepared and explored to develop a fluorescent detection of Pb. The FeO@AuNPs-FITC nanocomposites could be etched by Pb in the presence of NaSO, leading to fluorescence recovery of FITC quenched by FeO@Au nanocomposites. With the increase of Pb concentration, the fluorescence recovery of FeO@AuNPs-FITC increased gradually. Under optimized conditions, a detection limit of 5.2 nmol/L of Pb with a linear range of 0.02-2.0 µmol/L were obtained. The assay demonstrated negligible response to common metal ions. Recoveries of 98.2-106.4% were obtained when this fluorescent method was applied in detecting Pb spiked in a lake-water sample. The above results demonstrated the high potential of ion-induced nanomaterial etching in developing robust fluorescent assays.

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