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Fermi Level Engineering of Single-Walled Carbon Nanotubes by AuCl3 Doping
Abstract
We investigated the modulation of optical properties of single-walled carbon nanotubes (SWCNTs) by AuCl 3 doping. The van Hove singularity transitions (E 11 (S), E 22 (S), E 11 (M)) in absorption spectroscopy disappeared gradually with an increasing doping concentration and a new peak appeared at a high doping concentration. The work function was downshifted up to 0.42 eV by a strong charge transfer from the SWCNTs to AuCl 3 by a high level of p-doping. We propose that this large work function shift forces the Fermi level of the SWCNTs to be located deep in the valence band, i.e., highly degenerate, creating empty van Hove singularity states, and hence the work function shift invokes a new asymmetric transition in the absorption spectroscopy from a deeper level to newly generated empty states.
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Metadata
- Authors
- Kim, K. K., Bae, J. J., Park, H. K., Kim, S. M., Geng, H.-Z., Park, K. A., Shin, H.-J., Yoon, S.-M., Benayad, A., Choi, J.-Y., & Lee, Y. H.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2008-08-26
- Volume
- 130
- Issue
- 38
- Pages
- 12757-12761
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2034551913
- Cited by
- 282
- References
- 0
- FWCI
- 9.43
- Type
- journal article
- Language
- en
- Open access
- closed
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- Kim, K. K., Bae, J. J., Park, H. K., Kim, S. M., Geng, H.-Z., Park, K. A., Shin, H.-J., Yoon, S.-M., Benayad, A., Choi, J.-Y., & Lee, Y. H. (2008). Fermi Level Engineering of Single-Walled Carbon Nanotubes by AuCl3 Doping. Journal of the American Chemical Society. https://doi.org/10.1021/ja8038689
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