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Quantum Yield Heterogeneities of Aqueous Single-Wall Carbon Nanotube Suspensions
Abstract
Aqueous suspensions of single-wall carbon nanotubes (SWNTs) prepared by traditional methods from the supernatant of ultracentrifuged micellar SWNT mixtures are shown to be strongly heterogeneous with respect to the quantum yield of their constituents. The heterogeneities are isolated using preparative ultracentrifugation in iodixanol density gradients and are optically characterized by photoluminescence and linear absorption spectroscopy. We find that the most buoyant fractions with a density of 1.055 ± 0.005 g·cm -3 have the highest photoluminescence quantum yield η of 1.1%, a factor of 5 higher than that of the supernatant. Denser fractions with lower η make up for about 2 / 3 of these samples and contain mostly small ropes in which the quantum yield is reduced by nonradiative decay through coupling to metallic tubes.
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Cited by
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Sun, X., Liu, Z., Welsher, K., Robinson, J. T., Goodwin, A., Zaric, S., & Dai, H. (2008) · Nano Research · doi:10.1007/s12274-008-8021-8 · Cited by 3,291
Welsher, K., Sherlock, S. P., & Dai, H. (2011) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1014501108 · Cited by 958
Liu, Y., Li, Y., Koo, S., Sun, Y., Liu, Y., Liu, X., Pan, Y., Zhang, Z., Du, M., Lu, S., et al. (2022) · Chemical Reviews · doi:10.1021/acs.chemrev.1c00553 · Cited by 537
Brightening of carbon nanotube photoluminescence through the incorporation of sp3 defects
Piao, Y., Meany, B., Powell, L. R., Valley, N., Kwon, H., Schatz, G. C., & Wang, Y. (2013) · Nature Chemistry · doi:10.1038/nchem.1711 · Cited by 480
Yan, L., Zhao, F., Li, S., Hu, Z., & Zhao, Y. (2011) · Nanoscale · doi:10.1039/c0nr00647e · Cited by 300
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Metadata
- Authors
- Crochet, J., Clemens, M., & Hertel, T.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2007-06-07
- Volume
- 129
- Issue
- 26
- Pages
- 8058-8059
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2082487510
- Cited by
- 249
- References
- 0
- FWCI
- 13.89
- Type
- journal article
- Language
- en
- Open access
- closed
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