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Strongly Luminescent Composites Based on Carbon Dots Embedded in a Nanoporous Silicate Glass
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Strongly Luminescent Composites Based on Carbon Dots Embedded in a Nanoporous Silicate Glass
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Strongly Luminescent Composites Based on Carbon Dots Embedded in a Nanoporous Silicate Glass
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Journal Article
Strongly Luminescent Composites Based on Carbon Dots Embedded in a Nanoporous Silicate Glass
2020
Overview
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.
