Department of Applied Physics, Chongqing University, Chongqing 401331 (P. R. China); Division of Functional Materials and Nano-Devices, Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy Sciences, Ningbo 315201 (P. R. China).
Angew Chem Int Ed Engl. 2015 Apr 27;54(18):5360-3. doi: 10.1002/anie.201501193. Epub 2015 Mar 31.
A facile approach for preparation of photoluminescent (PL) carbon dots (CDs) is reported. The three resulting CDs emit bright and stable red, green and blue (RGB) colors of luminescence, under a single ultraviolet-light excitation. Alterations of PL emission of these CDs are tentatively proposed to result from the difference in their particle size and nitrogen content. Interestingly, up-conversion (UC)PL of these CDs is also observed. Moreover, flexible full-color emissive PVA films can be achieved through mixing two or three CDs in the appropriate ratios. These CDs also show low cytotoxicity and excellent cellular imaging capability. The facile preparation and unique optical features make these CDs potentially useful in numerous applications such as light-emitting diodes, full-color displays, and multiplexed (UC)PL bioimaging.
本文报道了一种简便的制备发光明（PL）碳点（CDs）的方法。这三种所得的 CDs 在单一紫外光激发下发出明亮且稳定的红、绿、蓝（RGB）颜色的光。这些 CDs 的 PL 发射的变化被推测是由于它们的粒径和氮含量的差异所致。有趣的是，这些 CDs 也观察到上转换（UC）PL。此外，通过以适当的比例混合两种或三种 CDs，可以获得具有柔韧性的全彩色发射性 PVA 膜。这些 CDs 还表现出低细胞毒性和优异的细胞成像能力。这种简便的制备方法和独特的光学特性使得这些 CDs 在发光二极管、全彩色显示器和多色（UC）PL 生物成像等众多应用中具有潜在的应用价值。
