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Cited by 177

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Graphene Nanoribbons from Unzipped Carbon Nanotubes: Atomic Structures, Raman Spectroscopy, and Electrical Properties

Open access
Xie, Liming, Wang, Hailiang, Jin, Chuanhong, Wang, Xinran, Jiao, Liying, Suenaga, Kazu, Dai, Hongjie·2011·Journal of the American Chemical Society

Abstract

We investigated the atomic structures, Raman spectroscopic and electrical transport properties of individual graphene nanoribbons (GNRs, widths ~10-30 nm) derived from sonochemical unzipping of multiwalled carbon nanotubes (MWNTs). Aberration-corrected transmission electron microscopy (TEM) revealed a high percentage of two-layer (2 L) GNRs and some single-layer ribbons. The layer-layer stacking angles ranged from 0° to 30° including average chiral angles near 30° (armchair orientation) or 0° (zigzag orientation). A large fraction of GNRs with bent and smooth edges was observed, while the rest showed flat and less smooth edges (roughness ≤1 nm). Polarized Raman spectroscopy probed individual GNRs to reveal D/G ratios and ratios of D band intensities at parallel and perpendicular laser excitation polarization (D(∥)/D(⊥)). The observed spectroscopic trends were used to infer the average chiral angles and edge smoothness of GNRs. Electrical transport and Raman measurements were carried out for individual ribbons to correlate spectroscopic and electrical properties of GNRs.

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Metadata

Authors
Xie, L., Wang, H., Jin, C., Wang, X., Jiao, L., Suenaga, K., & Dai, H.
Venue
Journal of the American Chemical Society
Published
2011-06-21
Volume
133
Issue
27
Pages
10394-10397
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2090277359
Cited by
177
References
1
FWCI
9.76
Type
journal article
Language
en
Open access
green

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