Fluorescence Enhancement of Carbon Dots by Graphene for Highly Sensitive Detection of Tetracycline Hydrochloride

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 May 11

PMID 35541980

Authors

Wei He

Xiangying Sun

Wenting Weng

Bin Liu

Affiliations

Soon will be listed here.

Abstract

In this study, fluorescence of self-assembled multilayers (SAMs) of carbon dots (CDs) was found to be enhanced by graphene. The number of polyelectrolyte layers can be tuned to control the distance between CDs and graphene in SAMs. The enhanced fluorescence efficiency was found to be dependent on graphene concentration, degree of graphene reduction, and the distance between CDs and graphene surface. When graphene concentration and polyelectrolyte bilayer number were set to 0.005 mg mL and 3 layers, respectively, fluorescence intensity of CDs could be increased up to 3.2 times. Tetracycline hydrochloride (Tc) could be detected by the established SAMs in the presence of graphene as the sensitivity was 2 orders higher than that of SAMs in the absence of graphene. Limit of detection of this sensing system was 0.9284 nM, which is 1-3 orders of magnitude lower than those of most of reported fluorescence sensors. This method could be successfully applied to detect trace Tc in milk samples.

Citing Articles

Carbon Nanomaterial Fluorescent Probes and Their Biological Applications.

Krasley A, Li E, Galeana J, Bulumulla C, Beyene A, Demirer G Chem Rev. 2024; 124(6):3085-3185.

PMID: 38478064 PMC: 10979413. DOI: 10.1021/acs.chemrev.3c00581.

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