Highly Efficient Red-Emitting Carbon Dots with Gram-Scale Yield for Bioimaging
Carbon dots (CDs) are a new class of photoluminescent (PL), biocompatible, environment-friendly, and low-cost carbon nanomaterials. Synthesis of highly efficient red-emitting carbon dots (R-CDs) on a gram scale is a great challenge at present, which heavily restricts the wide applications of CDs in...
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| Published in | Langmuir Vol. 33; no. 44; pp. 12635 - 12642 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
American Chemical Society
07.11.2017
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| Subjects | |
| Online Access | Get full text |
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| Abstract | Carbon dots (CDs) are a new class of photoluminescent (PL), biocompatible, environment-friendly, and low-cost carbon nanomaterials. Synthesis of highly efficient red-emitting carbon dots (R-CDs) on a gram scale is a great challenge at present, which heavily restricts the wide applications of CDs in the bioimaging field. Herein, R-CDs with a high quantum yield (QY) of 53% are produced on a gram scale by heating a formamide solution of citric acid and ethylenediamine. The as-prepared R-CDs have an average size of 4.1 nm and a nitrogen content of about 30%, with an excitation-independent emission at 627 nm. After detailed characterizations, such strong red fluorescence is ascribed to the contribution from the nitrogen- and oxygen-related surface states and the nitrogen-derived structures in the R-CD cores. Our R-CDs show good photostability and low cytotoxicity, and thus they are excellent red fluorescence probes for bioimaging both in vitro and in vivo. |
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| AbstractList | Carbon dots (CDs) are a new class of photoluminescent (PL), biocompatible, environment-friendly, and low-cost carbon nanomaterials. Synthesis of highly efficient red-emitting carbon dots (R-CDs) on a gram scale is a great challenge at present, which heavily restricts the wide applications of CDs in the bioimaging field. Herein, R-CDs with a high quantum yield (QY) of 53% are produced on a gram scale by heating a formamide solution of citric acid and ethylenediamine. The as-prepared R-CDs have an average size of 4.1 nm and a nitrogen content of about 30%, with an excitation-independent emission at 627 nm. After detailed characterizations, such strong red fluorescence is ascribed to the contribution from the nitrogen- and oxygen-related surface states and the nitrogen-derived structures in the R-CD cores. Our R-CDs show good photostability and low cytotoxicity, and thus they are excellent red fluorescence probes for bioimaging both in vitro and in vivo. Carbon dots (CDs) are a new class of photoluminescent (PL), biocompatible, environment-friendly, and low-cost carbon nanomaterials. Synthesis of highly efficient red-emitting carbon dots (R-CDs) on a gram scale is a great challenge at present, which heavily restricts the wide applications of CDs in the bioimaging field. Herein, R-CDs with a high quantum yield (QY) of 53% are produced on a gram scale by heating a formamide solution of citric acid and ethylenediamine. The as-prepared R-CDs have an average size of 4.1 nm and a nitrogen content of about 30%, with an excitation-independent emission at 627 nm. After detailed characterizations, such strong red fluorescence is ascribed to the contribution from the nitrogen- and oxygen-related surface states and the nitrogen-derived structures in the R-CD cores. Our R-CDs show good photostability and low cytotoxicity, and thus they are excellent red fluorescence probes for bioimaging both in vitro and in vivo.Carbon dots (CDs) are a new class of photoluminescent (PL), biocompatible, environment-friendly, and low-cost carbon nanomaterials. Synthesis of highly efficient red-emitting carbon dots (R-CDs) on a gram scale is a great challenge at present, which heavily restricts the wide applications of CDs in the bioimaging field. Herein, R-CDs with a high quantum yield (QY) of 53% are produced on a gram scale by heating a formamide solution of citric acid and ethylenediamine. The as-prepared R-CDs have an average size of 4.1 nm and a nitrogen content of about 30%, with an excitation-independent emission at 627 nm. After detailed characterizations, such strong red fluorescence is ascribed to the contribution from the nitrogen- and oxygen-related surface states and the nitrogen-derived structures in the R-CD cores. Our R-CDs show good photostability and low cytotoxicity, and thus they are excellent red fluorescence probes for bioimaging both in vitro and in vivo. |
| Author | Zhong, Ning Xiong, Huan-Ming Wei, Ji-Shi Ding, Hui Gao, Qing-Yu |
| AuthorAffiliation | College of Chemical Engineering Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University China University of Mining and Technology |
| AuthorAffiliation_xml | – name: Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials – name: Fudan University – name: College of Chemical Engineering – name: China University of Mining and Technology |
| Author_xml | – sequence: 1 givenname: Hui orcidid: 0000-0002-7568-182X surname: Ding fullname: Ding, Hui organization: China University of Mining and Technology – sequence: 2 givenname: Ji-Shi surname: Wei fullname: Wei, Ji-Shi organization: Fudan University – sequence: 3 givenname: Ning surname: Zhong fullname: Zhong, Ning organization: China University of Mining and Technology – sequence: 4 givenname: Qing-Yu orcidid: 0000-0002-5520-0240 surname: Gao fullname: Gao, Qing-Yu organization: China University of Mining and Technology – sequence: 5 givenname: Huan-Ming orcidid: 0000-0002-3118-942X surname: Xiong fullname: Xiong, Huan-Ming email: hmxiong@fudan.edu.cn organization: Fudan University |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/29039949$$D View this record in MEDLINE/PubMed |
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| Snippet | Carbon dots (CDs) are a new class of photoluminescent (PL), biocompatible, environment-friendly, and low-cost carbon nanomaterials. Synthesis of highly... |
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| SubjectTerms | Carbon - chemistry carbon quantum dots citric acid cytotoxicity Fluorescence fluorescent dyes Nitrogen nitrogen content Oxygen photoluminescence photostability Quantum Dots |
| Title | Highly Efficient Red-Emitting Carbon Dots with Gram-Scale Yield for Bioimaging |
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