Quantitative Visual Detection of Mercury Ions With Ratiometric Fluorescent Test Paper Sensor.

ABSTRACT: A novel ratiometric fluorescence probe based on nitrogen-doped blue carbon dots (NCDs) and red gold nanoclusters (Au NCs) for mercuric ion (Hg2+) has been prepared and characterized. A user friendly fluorescent test paper based sensor combined with smartphone was fabricated for rapid visual and quantitative detection. Hg²⁺ can specifically bind to Au⁺ on the surface of Au NCs, leading to the quench of red fluorescence while the fluorescence intensity of the NCDs with blue fluorescence remained unchanged as a internal standard signal. The implement of paper-based sensor address some common drawback in analytical process such as the detection time, analysis cost. In a further demonstration, a homemade detection device with smartphone was used to qualify the Hg²⁺

SUBMITTER: Fan M 

PROVIDER: S-EPMC8990869 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature