Guo Hongchong, You Bo, Zhao Shuyan, Wang Yihao, Sun Gang, Bai Yujie, Shi Lei
Department of Materials Science and the Advanced Coatings Research Center of the China Educational Ministry, Fudan University Shanghai 200433 PR China
Department of Aeronautics and Astronautics, Fudan University Shanghai 200433 PR China.
RSC Adv. 2018 Jul 2;8(42):24002-24012. doi: 10.1039/c8ra03723j. eCollection 2018 Jun 27.
Herein, we developed a facile method to produce high yield, full-color tunable photoluminescent (PL) carbon dots (CDs) at the oil/water interface. This unique synthesis method for CDs involved the use of the oil-soluble small molecule styrene as both the reactant and oil phase medium at low temperature (60 °C) through a catalytic-oxidation reaction in an aqueous system, which resulted in a high product yield (about 50 wt%). Interestingly, the hydroxy-rich CDs at the oil/water interface self-assembled into nanospheres (N-CDs) spontaneously hydrogen-bond interactions in the presence of styrene droplets. Without any surface passivation, the N-CDs exhibited self-quenching-resistant and full-color tunable PL properties, which are highly desirable in the optoelectronic field. The mechanism of the formation of N-CDs and their emission is proposed for the first time, which provides insight into the possible chemical processes occurring during the preparation. These distinctive CDs have potential novel applications in PL coatings, smart wearable optoelectronic devices, light emitting diodes, full-color displays, and solar cells.
在此，我们开发了一种简便的方法，可在油/水界面高产率地制备全色可调光致发光（PL）碳点（CDs）。这种独特的碳点合成方法涉及在低温（60°C）下，通过水体系中的催化氧化反应，使用油溶性小分子苯乙烯作为反应物和油相介质，从而获得了较高的产物产率（约50 wt%）。有趣的是，在油/水界面富含羟基的碳点在苯乙烯液滴存在下通过氢键相互作用自发自组装成纳米球（N-CDs）。无需任何表面钝化，N-CDs就表现出抗自猝灭和全色可调的PL特性，这在光电子领域是非常理想的。首次提出了N-CDs的形成及其发射机制，这为制备过程中可能发生的化学过程提供了深入了解。这些独特的碳点在PL涂层、智能可穿戴光电器件、发光二极管、全色显示器和太阳能电池等方面具有潜在的新应用。
