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Cited by 320

The DOI matches its Crossref record; 38 of the 38 references it cites were found in a registry or an index.

On-Surface Synthesis and Characterization of 9-Atom Wide Armchair Graphene Nanoribbons

Open access
Talirz, Leopold, Söde, Hajo, Dumslaff, Tim, Wang, Shiyong, Sanchez-Valencia, Juan Ramon, Liu, Jia, Shinde, Prashant, Pignedoli, Carlo A., Liang, Liangbo, Meunier, Vincent, Plumb, Nicholas C., Shi, Ming, Feng, Xinliang, Narita, Akimitsu, Müllen, Klaus, Fasel, Roman, Ruffieux, Pascal·2017·ACS Nano
DOI 10.1021/acsnano.6b06405
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Abstract

The bottom-up approach to synthesize graphene nanoribbons strives not only to introduce a band gap into the electronic structure of graphene but also to accurately tune its value by designing both the width and edge structure of the ribbons with atomic precision. We report the synthesis of an armchair graphene nanoribbon with a width of nine carbon atoms on Au(111) through surface-assisted aryl–aryl coupling and subsequent cyclodehydrogenation of a properly chosen molecular precursor. By combining high-resolution atomic force microscopy, scanning tunneling microscopy, and Raman spectroscopy, we demonstrate that the atomic structure of the fabricated ribbons is exactly as designed. Angle-resolved photoemission spectroscopy and Fourier-transformed scanning tunneling spectroscopy reveal an electronic band gap of 1.4 eV and effective masses of ≈0.1 m e for both electrons and holes, constituting a substantial improvement over previous efforts toward the development of transistor applications. We use ab initio calculations to gain insight into the dependence of the Raman spectra on excitation wavelength as well as to rationalize the symmetry-dependent contribution of the ribbons’ electronic states to the tunneling current. We propose a simple rule for the visibility of frontier electronic bands of armchair graphene nanoribbons in scanning tunneling spectroscopy.

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Metadata

Authors
Talirz, L., Söde, H., Dumslaff, T., Wang, S., Sanchez-Valencia, J. R., Liu, J., Shinde, P., Pignedoli, C. A., Liang, L., Meunier, V., Plumb, N. C., Shi, M., Feng, X., Narita, A., Müllen, K., Fasel, R., & Ruffieux, P.
Venue
ACS Nano
Publisher
American Chemical Society (ACS)
Published
2017-02-01
Volume
11
Issue
2
Pages
1380-1388
ISSN
  • 1936-0851 (ISSN-L)
  • 1936-086X
DOI
10.1021/acsnano.6b06405
OpenAlex
W2581464259
Cited by
320
References
38
FWCI
18.74
Type
journal article
Language
en
Open access
green

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