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Tuning the Band Gap of Graphene Nanoribbons Synthesized from Molecular Precursors
Abstract
A prerequisite for future graphene nanoribbon (GNR) applications is the ability to fine-tune the electronic band gap of GNRs. Such control requires the development of fabrication tools capable of precisely controlling width and edge geometry of GNRs at the atomic scale. Here we report a technique for modifying GNR band gaps via covalent self-assembly of a new species of molecular precursors that yields n = 13 armchair GNRs, a wider GNR than those previously synthesized using bottom-up molecular techniques. Scanning tunneling microscopy and spectroscopy reveal that these n = 13 armchair GNRs have a band gap of 1.4 eV, 1.2 eV smaller than the gap determined previously for n = 7 armchair GNRs. Furthermore, we observe a localized electronic state near the end of n = 13 armchair GNRs that is associated with hydrogen-terminated sp(2)-hybridized carbon atoms at the zigzag termini.
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Cited by
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Cai, J., Pignedoli, C. A., Talirz, L., Ruffieux, P., Söde, H., Liang, L., Meunier, V., Berger, R., Li, R., Feng, X., et al. (2014) · Nature Nanotechnology · doi:10.1038/nnano.2014.184 · Cited by 621
Rao, R., Pint, C. L., Islam, A. E., Weatherup, R. S., Hofmann, S., Meshot, E. R., Wu, F., Zhou, C., Dee, N., Amama, P. B., et al. (2018) · ACS Nano · doi:10.1021/acsnano.8b06511 · Cited by 588
Bottom-up synthesis of multifunctional nanoporous graphene
Moreno, C., Vilas-Varela, M., Kretz, B., Garcia-Lekue, A., Costache, M. V., Paradinas, M., Panighel, M., Ceballos, G., Valenzuela, S. O., Peña, D., et al. (2018) · Science · doi:10.1126/science.aar2009 · Cited by 567
Short-channel field-effect transistors with 9-atom and 13-atom wide graphene nanoribbons
Llinas, J. P., Fairbrother, A., Borin Barin, G., Shi, W., Lee, K., Wu, S., Yong Choi, B., Braganza, R., Lear, J., Kau, N., et al. (2017) · Nature Communications · doi:10.1038/s41467-017-00734-x · Cited by 391
Self-citationOn-Surface Synthesis and Characterization of 9-Atom Wide Armchair Graphene Nanoribbons
Talirz, L., Söde, H., Dumslaff, T., Wang, S., Sanchez-Valencia, J. R., Liu, J., Shinde, P., Pignedoli, C. A., Liang, L., Meunier, V., et al. (2017) · ACS Nano · doi:10.1021/acsnano.6b06405 · Cited by 320
Li, X., Wang, Q., & Jena, P. (2017) · The Journal of Physical Chemistry Letters · doi:10.1021/acs.jpclett.7b01364 · Cited by 305
Frontiers of on-surface synthesis: From principles to applications
Shen, Q., Gao, H.-Y., & Fuchs, H. (2017) · Nano Today · doi:10.1016/j.nantod.2017.02.007 · Cited by 286
Metadata
- Authors
- Chen, Y.-C., de Oteyza, D. G., Pedramrazi, Z., Chen, C., Fischer, F. R., & Crommie, M. F.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2013-06-12
- Volume
- 7
- Issue
- 7
- Pages
- 6123-6128
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W1991384072
- Cited by
- 588
- References
- 0
- FWCI
- 22.05
- Type
- journal article
- Language
- en
- Open access
- closed
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