| 초록 |
Tetracycline (TC) is one of the most widely used antibiotics for humans as well as animals. Long-term and repeated intake through residual TC in animals is considered to have serious side effect. The development of simple and sensitive detection methods for TC is highly demanding. In this study, carbon dots (CD) were in-situ synthesized at cellulose nanofiber (CNF) for highly sensitive ratio-metric TC indicator. Glutathione and citric acid were used as precursors for CD. The well-dispersed precursors on CNF dispersion were hydrothermally treated together. Photoluminescence (PL) spectroscopy was used to confirm the ratio-metric detection of TC. By simply dopping the TC solution, the fluorescence intensity of the composites was dramatically quenched. The fluorescence intensity of the paper in low-concentration tetracycline solution was decreased signifiantly, even recognizable by naked eyes. |
