Green synthesis of graphitic carbon nitride nanosheet (g-CN) and using it as a label-free fluorosensor for detection of metronidazole via quenching of the fluorescence.

In this research, g-CNnanosheets were facilely fabricated by thermal polymerization and then exfoliated into ultrathin nanosheets through ultrasonication in water media. Low-cost C-N nanosheets prepared by melamine possessed a highly π-conjugated structure and fluorescence property. In the present study, the g-CNnanosheet was used as a switch-off fluorescence sensor for rapid and sensitive sensing of metronidazole in biological fluids.