Temperature-responsive conversion of thermally activated delayed fluorescence and room-temperature phosphorescence of carbon dots in silica
| Autor: | Chaofan Hu, Yuqiong Sun, Mingtao Zheng, Jianle Zhuang, Jinkun Liu, Yingliang Liu, Bingfu Lei, Haoran Zhang, Xuejie Zhang, Xiaoliang Pang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Temperature control
Materials science Temperature sensing chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry Alkali metal 01 natural sciences Fluorescence 0104 chemical sciences Afterglow Fingerprint detection chemistry Materials Chemistry 0210 nano-technology Phosphorescence Carbon |
| Zdroj: | Journal of Materials Chemistry C. 8:5744-5751 |
| ISSN: | 2050-7534 2050-7526 |
| Popis: | Afterglow including thermally activated delayed fluorescence (TADF) and room-temperature phosphorescence (RTP) has stimulated considerable attention owing to bright potential applications in optoelectronic devices, sensing, and security systems. However, previously reported afterglow materials are mostly single-mode (one of RTP or TADF only), a tunable multi-mode afterglow emission is still rarely achieved. Herein, we report the temperature-responsive conversion characteristics of TADF and RTP of carbon dots in silica (CDs@SiO2) for the first time. The unique temperature-responsive afterglow characteristics, that is, phosphorescence and TADF can be mutually transformed as the temperature changes, resulting in the free conversion of the RTP/TADF ratio as well as the afterglow color change through simple temperature control. The Si–O network plays multiple roles to strengthen and confine the embedded CDs, thus resulting in ultralong RTP emission and unique afterglow characteristics. Furthermore, CDs@SiO2 exhibited excellent stability against water, acid, alkali, salt and oxidants as well as polar solvents. CDs@SiO2 with unique afterglow characteristics and high stability can have multiple potential applications in rapid fingerprint detection and temperature sensing, especially in advanced temperature-responsive multicolor anti-counterfeiting and encryption. |
| Databáze: | OpenAIRE |
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