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Common Origin of Green Luminescence in Carbon Nanodots and Graphene Quantum Dots
Abstract
Carbon nanodots (C-dots) synthesized by electrochemical ablation and small molecule carbonization, as well as graphene quantum dots (GQDs) fabricated by solvothermally cutting graphene oxide, are three kinds of typical green fluorescence carbon nanomaterials. Insight into the photoluminescence origin in these fluorescent carbon nanomaterials is one of the important matters of current debates. Here, a common origin of green luminescence in these C-dots and GQDs is unraveled by ultrafast spectroscopy. According to the change of surface functional groups during surface chemical reduction experiments, which are also accompanied by obvious emission-type transform, these common green luminescence emission centers that emerge in these C-dots and GQDs synthesized by bottom-up and top-down methods are unambiguously assigned to special edge states consisting of several carbon atoms on the edge of carbon backbone and functional groups with C═O (carbonyl and carboxyl groups). Our findings further suggest that the competition among various emission centers (bright edge states) and traps dominates the optical properties of these fluorescent carbon nanomaterials.
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Cited by
Zhu, S., Song, Y., Zhao, X., Shao, J., Zhang, J., & Yang, B. (2015) · Nano Research · doi:10.1007/s12274-014-0644-3 · Cited by 2,781
Self-citationCarbon quantum dots: synthesis, properties and applications
Wang, Y., & Hu, A. (2014) · Journal of Materials Chemistry C · doi:10.1039/c4tc00988f · Cited by 2,597
Georgakilas, V., Perman, J. A., Tucek, J., & Zboril, R. (2015) · Chemical Reviews · doi:10.1021/cr500304f · Cited by 2,147
Evolution and Synthesis of Carbon Dots: From Carbon Dots to Carbonized Polymer Dots
Xia, C., Zhu, S., Feng, T., Yang, M., & Yang, B. (2019) · Advanced Science · doi:10.1002/advs.201901316 · Cited by 1,508
Self-citationCarbon dots—Emerging light emitters for bioimaging, cancer therapy and optoelectronics
Hola, K., Zhang, Y., Wang, Y., Giannelis, E. P., Zboril, R., & Rogach, A. L. (2014) · Nano Today · doi:10.1016/j.nantod.2014.09.004 · Cited by 992
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Metadata
- Authors
- Wang, L., Zhu, S.-J., Wang, H.-Y., Qu, S.-N., Zhang, Y.-L., Zhang, J.-H., Chen, Q.-D., Xu, H.-L., Han, W., Yang, B., & Sun, H.-B.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-02-17
- Volume
- 8
- Issue
- 3
- Pages
- 2541-2547
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W2315597564
- Cited by
- 816
- References
- 0
- FWCI
- 42.59
- Type
- journal article
- Language
- en
- Open access
- closed
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- Wang, L., Zhu, S.-J., Wang, H.-Y., Qu, S.-N., Zhang, Y.-L., Zhang, J.-H., Chen, Q.-D., Xu, H.-L., Han, W., Yang, B., & Sun, H.-B. (2014). Common Origin of Green Luminescence in Carbon Nanodots and Graphene Quantum Dots. ACS Nano. https://doi.org/10.1021/nn500368m
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