High-resolution scanning tunneling microscopy imaging of mesoscopic graphene sheets on an insulating surface

Stolyarova E, Rim K, Ryu S, Maultzsch J, Kim P, Brus LE, Heinz TF, Hybertsen M, Flynn GW (2007)


Publication Status: Published

Publication Type: Journal article

Publication year: 2007

Journal

Publisher: NATL ACAD SCIENCES

Book Volume: 104

Pages Range: 9209-9212

Journal Issue: 22

DOI: 10.1073/pnas.0703337104

Open Access Link: https://arxiv.org/abs/0705.0833

Abstract

We present scanning tunneling microscopy (STM) images of singlelayer graphene crystals examined under ultrahigh vacuum conditions. The samples, with lateral dimensions on the micrometer scale, were prepared on a silicon dioxide surface by direct exfoliation of crystalline graphite. The single-layer films were identified by using Raman spectroscopy. Topographic images of single-layer samples display the honeycomb structure expected for the full hexagonal symmetry of an isolated graphene monolayer. The absence of observable defects in the STM images is indicative of the high quality of these films. Crystals composed of a few layers of graphene also were examined. They exhibited dramatically different STM topography, displaying the reduced threefold symmetry characteristic of the surface of bulk graphite.

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APA:

Stolyarova, E., Rim, K., Ryu, S., Maultzsch, J., Kim, P., Brus, L.E.,... Flynn, G.W. (2007). High-resolution scanning tunneling microscopy imaging of mesoscopic graphene sheets on an insulating surface. Proceedings of the National Academy of Sciences of the United States of America, 104(22), 9209-9212. https://doi.org/10.1073/pnas.0703337104

MLA:

Stolyarova, Elena, et al. "High-resolution scanning tunneling microscopy imaging of mesoscopic graphene sheets on an insulating surface." Proceedings of the National Academy of Sciences of the United States of America 104.22 (2007): 9209-9212.

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