Controlling the fluorescence and room-temperature phosphorescence behaviour of carbon nanodots with inorganic crystalline nanocomposites
| Autor: | Shuheng Zhang, Mark A. Levenstein, Fiona C. Meldrum, David C. Green, Mark A. Holden, Stanley W. Botchway, Andrew D. Ward, Julia Gala de Pablo, Benjamin R. G. Johnson |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Photoluminescence F300 Science F100 F200 General Physics and Astronomy 02 engineering and technology Photochemistry 7. Clean energy General Biochemistry Genetics and Molecular Biology Article 03 medical and health sciences Phase (matter) lcsh:Science Multidisciplinary Nanocomposite General Chemistry 021001 nanoscience & nanotechnology Fluorescence Afterglow 030104 developmental biology Excited state lcsh:Q 0210 nano-technology Phosphorescence Luminescence |
| Zdroj: | Nature Communications, Vol 10, Iss 1, Pp 1-13 (2019) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | There is a significant drive to identify alternative materials that exhibit room temperature phosphorescence for technologies including bio-imaging, photodynamic therapy and organic light-emitting diodes. Ideally, these materials should be non-toxic and cheap, and it will be possible to control their photoluminescent properties. This was achieved here by embedding carbon nanodots within crystalline particles of alkaline earth carbonates, sulphates and oxalates. The resultant nanocomposites are luminescent and exhibit a bright, sub-second lifetime afterglow. Importantly, the excited state lifetimes, and steady-state and afterglow colours can all be systematically controlled by varying the cations and anions in the host inorganic phase, due to the influence of the cation size and material density on emissive and non-emissive electronic transitions. This simple strategy provides a flexible route for generating materials with specific, phosphorescent properties and is an exciting alternative to approaches relying on the synthesis of custom-made luminescent organic molecules. Materials exhibiting room temperature phosphorescence (RTP) with short afterglow are desirable for bio-medical applications. Here the authors synthesise a library of compounds with tunable RTP properties, embedding carbon nanodots in non-toxic alkaline-earth carbonate, sulphate and oxalate hosts. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|