| 초록 |
Carbon nanodots (C-dots) exhibit great potential in cell imaging, chemosensor, optical sensing, bioimaging, and optoelectronics due to their biocompatible, non-toxic, excellent chemical and photostability as well as superior optical properties. Rhodamine derivatives with the spirolactam are colorless and non-fluorescent, whereas the ring-opened amide form induced by metal ions give rise to appearance of pink color and strong fluorescence emission. In this work, we synthesized rhodamine-appended carbon nanodots fluorescence sensor by combining a rhodamine 6G with C-dots and developed paper-based sensing material based on fluorescence resonance energy transfer (FRET). C-dots were chosen as the energy donor because its fluorescence emission spectrum well matches with the absorption spectrum of rhodamine 6G. The paper-based sensors have fluorescent response and colorimetric changed by Al3+-induced ring-opening reaction through the chelation of rhodamine moiety. |
