Visible-Light-Excited Room Temperature Phosphorescent Carbon Dots
Carbon dots (CDs) with a room temperature phosphorescent (RTP) feature have attracted considerable interest in recent years due to their fundamental importance and promising applications. However, the reported matrix-free RTP CDs only show short-wavelength (green to yellow) emissions and have to be...
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| Format: | Article |
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MDPI AG
2020-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/10/3/464 |
| _version_ | 1819207436912820224 |
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| author | Sizhe Hu Kai Jiang Yuci Wang Sui Wang Zhongjun Li Hengwei Lin |
| author_facet | Sizhe Hu Kai Jiang Yuci Wang Sui Wang Zhongjun Li Hengwei Lin |
| author_sort | Sizhe Hu |
| collection | DOAJ |
| description | Carbon dots (CDs) with a room temperature phosphorescent (RTP) feature have attracted considerable interest in recent years due to their fundamental importance and promising applications. However, the reported matrix-free RTP CDs only show short-wavelength (green to yellow) emissions and have to be triggered by ultraviolet (UV) light (below 400 nm), limiting their applications in certain fields. Herein, visible-light-excited matrix-free RTP CDs (named AA-CDs) with a long-wavelength (orange) emission are reported for the first time. The AA-CDs can be facilely prepared via a microwave heating treatment of L-aspartic acid (AA) in the presence of ammonia and they emit unique orange RTP in the solid state with visible light (420 nm) excitation just being switched off. Through the studies of the carbonization process, the C=O and C=N containing moieties in the AA-CDs are confirmed to be responsible for the observed RTP emission. Finally, the applications of AA-CDs in information encryption and anti-counterfeiting were preliminarily demonstrated. |
| first_indexed | 2024-12-23T05:23:28Z |
| format | Article |
| id | doaj.art-3b34bc062019422184cd78c77f72c36e |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-12-23T05:23:28Z |
| publishDate | 2020-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-3b34bc062019422184cd78c77f72c36e2022-12-21T17:58:38ZengMDPI AGNanomaterials2079-49912020-03-0110346410.3390/nano10030464nano10030464Visible-Light-Excited Room Temperature Phosphorescent Carbon DotsSizhe Hu0Kai Jiang1Yuci Wang2Sui Wang3Zhongjun Li4Hengwei Lin5School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, ChinaNingbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, ChinaNingbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, ChinaSchool of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, ChinaCollege of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, ChinaNingbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, ChinaCarbon dots (CDs) with a room temperature phosphorescent (RTP) feature have attracted considerable interest in recent years due to their fundamental importance and promising applications. However, the reported matrix-free RTP CDs only show short-wavelength (green to yellow) emissions and have to be triggered by ultraviolet (UV) light (below 400 nm), limiting their applications in certain fields. Herein, visible-light-excited matrix-free RTP CDs (named AA-CDs) with a long-wavelength (orange) emission are reported for the first time. The AA-CDs can be facilely prepared via a microwave heating treatment of L-aspartic acid (AA) in the presence of ammonia and they emit unique orange RTP in the solid state with visible light (420 nm) excitation just being switched off. Through the studies of the carbonization process, the C=O and C=N containing moieties in the AA-CDs are confirmed to be responsible for the observed RTP emission. Finally, the applications of AA-CDs in information encryption and anti-counterfeiting were preliminarily demonstrated.https://www.mdpi.com/2079-4991/10/3/464carbon dotsroom temperature phosphorescencevisible-light-excitationanti-counterfeiting |
| spellingShingle | Sizhe Hu Kai Jiang Yuci Wang Sui Wang Zhongjun Li Hengwei Lin Visible-Light-Excited Room Temperature Phosphorescent Carbon Dots Nanomaterials carbon dots room temperature phosphorescence visible-light-excitation anti-counterfeiting |
| title | Visible-Light-Excited Room Temperature Phosphorescent Carbon Dots |
| title_full | Visible-Light-Excited Room Temperature Phosphorescent Carbon Dots |
| title_fullStr | Visible-Light-Excited Room Temperature Phosphorescent Carbon Dots |
| title_full_unstemmed | Visible-Light-Excited Room Temperature Phosphorescent Carbon Dots |
| title_short | Visible-Light-Excited Room Temperature Phosphorescent Carbon Dots |
| title_sort | visible light excited room temperature phosphorescent carbon dots |
| topic | carbon dots room temperature phosphorescence visible-light-excitation anti-counterfeiting |
| url | https://www.mdpi.com/2079-4991/10/3/464 |
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