期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 11, 期 13, 页码 5093-5104出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.2c07077
关键词
ratiometric fluorescent nanosensor; BSA-AuNCs; silica-coated N-CDs; dual-emissive probes; glyphosate
A novel ratiometric fluorescent nanosensor combining mesoporous silica spheres-coated nitrogen-doped carbon dots (N-CDs@SiO2) and bovine serum albumin-stabilized gold nanoclusters (BSA-AuNCs) was developed for sensitive detection of glyphosate. The nanosensor showed highly selective differentiation and accurate detection of glyphosate based on the fluorescence quenching of Cu2+ on BSA-AuNCs and the fluorescence recovery induced by glyphosate. It exhibited excellent selectivity, wide detectability, high sensitivity and reliability, making it suitable for applications in the environment and food safety fields.
In this work, a novel ratiometric fluorescent nanosensor by coupling mesoporous silica spheres-coated nitrogen-doped carbon dots (N-CDs@SiO2) and bovine serum albumin-stabilized gold nanoclusters (BSA-AuNCs) was developed for sensitive detection of glyphosate. BSA-AuNCs nanocomposites were covalently connected onto the surface of amino-functionalized N-CDs@SiO2 nanospheres, causing the core-satellite probes with two fluorescence emissions at 436 and 651 nm, respectively, under a single excitation of 360 nm. The N-CDs@SiO2@BSA-AuNCs signal on-off-on ratiometric fluorescent probes could realize highly selective differentiation and accurate detection of glyphosate based on the fluorescence quenching of Cu2+ on BSA-AuNCs and glyphosate-induced fluorescence recovery due to the strong complexation of glyphosate toward Cu2+. The developed ratiometric fluorescent nanosensor exhibited excellent selectivity to glyphosate, wide detectability in a concentration range of 5-100 ng/mL, high sensitivity with a low detection limit of 3.4 ng/mL, as well as fascinating reliability and practicability in real malt samples with recoveries of 94.81-101.61%. This study provides a universal platform for versatile sensing of more trace analytes in complex matrices and can be extended for wide application in the environment and food safety fields.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据