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Temperature-Dependent Fluorescence in Carbon Dots
Abstract
Carbon dots are cost-effective, environmental friendly, and biocompatible nanoparticles with many potential applications in optoelectronics and biophotonics. Their dual fluorescence bands were observed and could be attributed to core and surface state emission. We also conduct temperature-dependent fluorescence measurements from cryogenic to room temperatures. The dual emission bands exhibit similar temperature dependence. The strong electron–electron interactions and weak electron–phonon interactions could account for the very broad photoluminescence (PL) band even at 77 K. Our experimental results also suggest that carbon dots exhibit similar temperature behavior as metallic quantum dots (nanoclusters) but are different from inorganic semiconductor quantum dots. Here, for the first time, we present the temperature-dependent spectroscopic results to shed some light on the presently unclear fluorescence mechanism.
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Cites
One-step synthesis of fluorescent carbon nanoparticles by laser irradiation
Hu, S.-L., Niu, K.-Y., Sun, J., Yang, J., Zhao, N.-Q., & Du, X.-W. (2009) · J. Mater. Chem. · doi:10.1039/b812943f · Cited by 968
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
An overview of nanoparticles commonly used in fluorescent bioimaging
Wolfbeis, O. S. (2015) · Chemical Society Reviews · doi:10.1039/c4cs00392f · Cited by 1,631
Carbon 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
Nie, H., Li, M., Li, Q., Liang, S., Tan, Y., Sheng, L., Shi, W., & Zhang, S. X.-A. (2014) · Chemistry of Materials · doi:10.1021/cm5003669 · Cited by 955
Common Origin of Green Luminescence in Carbon Nanodots and Graphene Quantum Dots
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., et al. (2014) · ACS Nano · doi:10.1021/nn500368m · Cited by 816
Metadata
- Authors
- Yu, P., Wen, X., Toh, Y.-R., & Tang, J.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-11-27
- Volume
- 116
- Issue
- 48
- Pages
- 25552-25557
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W2320592746
- Cited by
- 491
- References
- 1
- FWCI
- 10.86
- Type
- journal article
- Language
- en
- Open access
- closed
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