High Quantum Yield Green-Emitting Carbon Dots for Fe(III) Detection, Biocompatible Fluorescent Ink and Cellular Imaging

作者：Khan, Waheed Ullah; Wang, Deyin^*; Zhang, Wei; Tang, Zuobin; Ma, Xinlong; Ding, Xin; Du, Shanshan; Wang, Yuhua^*

来源：Scientific Reports, 2017, 7(1): 14866.

DOI：10.1038/s41598-017-15054-9

• ONE-STEP SYNTHESIS
• ONE-POT
• SENSING PLATFORM
• FACILE SYNTHESIS
• SCALE SYNTHESIS
• COLOR EMISSION
• GRAPHENE OXIDE
• METAL-IONS
• NITROGEN
• LUMINESCENCE

In the present work, we reported the luminescence of a green-emitting carbon dots (CDs) synthesized via solid state reaction method using diammonium hydrogen citrate and urea as a starting materials. The obtained green-emitting CDs shows strong absorption in the 350-450 nm region and gives intense green emission (lambda(max) = 537 nm) with quantum yield as high as 46.4% under 420 nm excitation. The obtained green-emitting CDs also demonstrates high photo-stability, which is evidenced by the fact that its emission intensity almost has no change under irradiation by a 365 nm UV lamp for 2 hours. Moreover, the obtained green-emitting CDs shows high sensitivity and selectivity for the detection of Fe3+, and their emission intensity response towards Fe3+ ions is highly linear (R-2 = 0.995) over the concentration range from 25 to 300 mu M, which could provide an effective platform for detection of Fe3+. Mostly important, we further demonstrate that such photoluminescent green-emitting CDs exhibits low toxicity and are biocompatible for use with in cellular imaging. Combining with low cytotoxicity, good water solubility and excellent luminescence properties, green-emitting CDs could be used as a biocompatible fluorescent ink in future applications.

• 出版日期2017-11-1
• 单位兰州大学