Highly green fluorescent Nb2C MXene quantum dots for Cu2+ ion sensing and cell imaging |
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| Institution: | 1. Physics Characterization and Simulations Lab (PCSL), Department of Physics, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan;2. Microelectronics Research Center, The University of Texas at Austin, Austin, Texas 78758, United States |
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| Abstract: | Niobium carbide MXene quantum dots (Nb2C MQDs) derived from 2D Nb2CTx (MXene) are the rising-star material recently. Herein, a sulfur and nitrogen co-doped Nb2C MQDs (S, N-MQDs) were synthesized through a hydrothermal method. The obtained Nb2C MQDs have excellent green fluorescence with a quantum yield (QY) of 17.25%. In addition, they exhibited excitation-dependent photoluminescence, anti-photobleaching and dispersion stability. They emit light at 520 nm when excited at 390 nm. The Nb2C MQDs could be successfully applied to copper ion detection with detection limit of 2 μmol/L and Caco-2 cells imaging. |
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| Keywords: | 2D-QDs Cell imaging Ion sensing Sulfur-nitrogen co-doping |
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