Jump to main content
Jump to site search

Issue 13, 2014
Previous Article Next Article

Raman identification of edge alignment of bilayer graphene down to the nanometer scale

Author affiliations

Abstract

The ideal edges of bilayer graphene (BLG) are that the edges of the top and bottom graphene layers (GLs) of BLG are well-aligned. Actually, the alignment distance between the edges of the top and bottom GLs of a real BLG can be as large as the submicrometer scale or as small as zero, which cannot be distinguished using an optical microscope. Here, we present a detailed Raman study on BLG at its edges. If the alignment distance of the top and bottom GLs of BLG is larger than the laser spot, the measured D mode at the edge of the top GL of BLG shows a similar spectral profile to that of disordered BLG. If the alignment distance is smaller than the laser spot, the D mode at a real BLG edge shows three typical spectral profiles similar to that at the edge of SLG, that of the well-aligned edge of BLG, or a combination of both. We show the sensitivity and ability of Raman spectroscopy to acquire the alignment distance between two edges of top and bottom GLs of BLG as small as several nanometers, which is far beyond the diffraction limit of a laser spot. This work opens the possibility to probe the edge alignment of multi-layer graphene.

Graphical abstract: Raman identification of edge alignment of bilayer graphene down to the nanometer scale

Back to tab navigation

Article information


Submitted
24 Jan 2014
Accepted
14 Apr 2014
First published
17 Apr 2014

Nanoscale, 2014,6, 7519-7525
Article type
Paper
Author version available

Raman identification of edge alignment of bilayer graphene down to the nanometer scale

X. Zhang, Q. Li, W. Han, Y. Lu, W. Shi, J. Wu, A. S. Mikhaylushkin and P. Tan, Nanoscale, 2014, 6, 7519
DOI: 10.1039/C4NR00499J

Social activity

Search articles by author

Spotlight

Advertisements