Nickel-Atom Doping as a Potential Means to Enhance the Photoluminescence Performance of Carbon Dots
Heteroatom doping, particularly with nonmetallic atoms such as N, P, and S, has proven to be an effective strategy for modulating the fluorescent properties of carbon dots (CDs). However, there are few reports on the regulation of the photoluminescence of CDs by transition-metal doping. In this work...
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MDPI AG
2023-07-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/14/5526 |
| _version_ | 1797588018178031616 |
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| author | Wenqi Kong Can Li Zhongqi Sun Fucheng Gao Jinfan Zheng Yanyan Jiang |
| author_facet | Wenqi Kong Can Li Zhongqi Sun Fucheng Gao Jinfan Zheng Yanyan Jiang |
| author_sort | Wenqi Kong |
| collection | DOAJ |
| description | Heteroatom doping, particularly with nonmetallic atoms such as N, P, and S, has proven to be an effective strategy for modulating the fluorescent properties of carbon dots (CDs). However, there are few reports on the regulation of the photoluminescence of CDs by transition-metal doping. In this work, nickel-doped CDs (Ni-CDs) were fabricated using the hydrothermal approach. Ni atoms were incorporated into the sp<sup>2</sup> domains of the CDs through Ni-N bonds, resulting in an increased degree of graphitization of the Ni-CDs. Additionally, Ni-atom doping served to shorten the electron transition and recombination lifetimes, and suppress the nonradiative recombination process, resulting in an absolute fluorescence quantum yield of 54.7% for the Ni-CDs. Meanwhile, the as-prepared Ni-CDs exhibited excellent biocompatibility and were utilized for fluorescent bioimaging of HeLa cells. Subsequently, the Ni-CDs were employed as fluorescent anticounterfeiting inks for the successful encryption of two-dimensional barcodes. Our work demonstrates a novel heteroatom doping strategy for the synthesis of highly fluorescence-emitting CDs. |
| first_indexed | 2024-03-11T00:47:02Z |
| format | Article |
| id | doaj.art-84818b4af86f4304983460864e23f1a3 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T00:47:02Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-84818b4af86f4304983460864e23f1a32023-11-18T20:43:24ZengMDPI AGMolecules1420-30492023-07-012814552610.3390/molecules28145526Nickel-Atom Doping as a Potential Means to Enhance the Photoluminescence Performance of Carbon DotsWenqi Kong0Can Li1Zhongqi Sun2Fucheng Gao3Jinfan Zheng4Yanyan Jiang5Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, ChinaDepartment of Neurology, Qilu Hospital, Shandong University, Jinan 250100, ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, ChinaHeteroatom doping, particularly with nonmetallic atoms such as N, P, and S, has proven to be an effective strategy for modulating the fluorescent properties of carbon dots (CDs). However, there are few reports on the regulation of the photoluminescence of CDs by transition-metal doping. In this work, nickel-doped CDs (Ni-CDs) were fabricated using the hydrothermal approach. Ni atoms were incorporated into the sp<sup>2</sup> domains of the CDs through Ni-N bonds, resulting in an increased degree of graphitization of the Ni-CDs. Additionally, Ni-atom doping served to shorten the electron transition and recombination lifetimes, and suppress the nonradiative recombination process, resulting in an absolute fluorescence quantum yield of 54.7% for the Ni-CDs. Meanwhile, the as-prepared Ni-CDs exhibited excellent biocompatibility and were utilized for fluorescent bioimaging of HeLa cells. Subsequently, the Ni-CDs were employed as fluorescent anticounterfeiting inks for the successful encryption of two-dimensional barcodes. Our work demonstrates a novel heteroatom doping strategy for the synthesis of highly fluorescence-emitting CDs.https://www.mdpi.com/1420-3049/28/14/5526carbon dotsnickel-atoms dopingfluorescence imaginganticounterfeiting |
| spellingShingle | Wenqi Kong Can Li Zhongqi Sun Fucheng Gao Jinfan Zheng Yanyan Jiang Nickel-Atom Doping as a Potential Means to Enhance the Photoluminescence Performance of Carbon Dots Molecules carbon dots nickel-atoms doping fluorescence imaging anticounterfeiting |
| title | Nickel-Atom Doping as a Potential Means to Enhance the Photoluminescence Performance of Carbon Dots |
| title_full | Nickel-Atom Doping as a Potential Means to Enhance the Photoluminescence Performance of Carbon Dots |
| title_fullStr | Nickel-Atom Doping as a Potential Means to Enhance the Photoluminescence Performance of Carbon Dots |
| title_full_unstemmed | Nickel-Atom Doping as a Potential Means to Enhance the Photoluminescence Performance of Carbon Dots |
| title_short | Nickel-Atom Doping as a Potential Means to Enhance the Photoluminescence Performance of Carbon Dots |
| title_sort | nickel atom doping as a potential means to enhance the photoluminescence performance of carbon dots |
| topic | carbon dots nickel-atoms doping fluorescence imaging anticounterfeiting |
| url | https://www.mdpi.com/1420-3049/28/14/5526 |
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