Stepanidenko Evgeniia A, Khavlyuk Pavel D, Arefina Irina A, Cherevkov Sergei A, Xiong Yuan, Döring Aaron, Varygin Georgii V, Kurdyukov Dmitry A, Eurov Daniil A, Golubev Valery G, Masharin Mikhail A, Baranov Alexander V, Fedorov Anatoly V, Ushakova Elena V, Rogach Andrey L
Center of Information Optical Technologies, ITMO University, 49 Kronverkskiy Pr., 197101 St. Petersburg, Russia.
Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, China.
Nanomaterials (Basel). 2020 May 30;10(6):1063. doi: 10.3390/nano10061063.
Luminescent composites based on entirely non-toxic, environmentally friendly compounds are in high demand for a variety of applications in photonics and optoelectronics. Carbon dots are a recently developed kind of luminescent nanomaterial that is eco-friendly, biocompatible, easy-to-obtain, and inexpensive, with a stable and widely tunable emission. Herein, we introduce luminescent composites based on carbon dots of different chemical compositions and with different functional groups at the surface which were embedded in a nanoporous silicate glass. The structure and optical properties of these composites were comprehensively examined using electron microscopy, Fourier transform infrared transmission, UV-Vis absorption, and steady-state and time-resolved photoluminescence. It is shown that the silicate matrix efficiently preserved, and even enhanced the emission of different kinds of carbon dots tested. The photoluminescence quantum yield of the fabricated nanocomposite materials reached 35-40%, which is comparable to or even exceeds the values for carbon dots in solution.
基于完全无毒、环境友好型化合物的发光复合材料在光子学和光电子学的各种应用中需求量很大。碳点是一种最近开发的发光纳米材料，具有生态友好、生物相容性好、易于获得且价格低廉的特点，其发射稳定且可广泛调谐。在此，我们介绍了基于不同化学组成且表面带有不同官能团的碳点的发光复合材料，这些碳点被嵌入到纳米多孔硅酸盐玻璃中。使用电子显微镜、傅里叶变换红外透射、紫外 - 可见吸收以及稳态和时间分辨光致发光对这些复合材料的结构和光学性质进行了全面研究。结果表明，硅酸盐基质有效地保留了甚至增强了所测试的不同种类碳点的发射。所制备的纳米复合材料的光致发光量子产率达到35 - 40%，这与溶液中碳点的值相当甚至超过了该值。
