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Updated: Feb 8, 2026

Preparation of Carbon Nanosheets at Room Temperature
Published on: March 8, 2016
Silver-doped graphite carbon nitride nanosheets as fluorescent probe for the detection of curcumin
Haifen Yang1, Xuebing Li2, Xinxv Wang3
1School of Pharmacy, Shanxi Medical University, Taiyuan, P. R. China.
Abstract:
Green fluorescent silver (Ag)-doped graphite carbon nitride (Ag-g-C3 N4 ) nanosheets have been fabricated by an ultrasonic exfoliating method. The fluorescence of the Ag-g-C3 N4 nanosheets is quenched by curcumin. The fluorescence intensity decreases with the increase in the concentration of curcumin, indicating that the Ag-g-C3 N4 nanosheets can function as a non-toxic and facile fluorescence probe to detect curcumin. The fluorescence intensity of Ag-g-C3 N4 nanosheets shows a linear relationship to curcumin in the concentration range 0.01-2.00 μM with a low detection limit of 38 nM. The fluorescence quenching process between curcumin and Ag-g-C3 N4 nanosheets mainly is based on static quenching. The fluorescent probe has been successfully applied to analyse curcumin in human urine and serum samples with satisfactory results.
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