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Letter

Bulk Production of a New Form of sp² Carbon: Crystalline Graphene Nanoribbons

Supporting Info

Jessica Campos-Delgado^†, Jos

Manuel Romo-Herrera^†, Xiaoting Jia^‡, David A. Cullen^§, Hiroyuki Muramatsu, Yoong Ahm Kim, Takuya Hayashi, Zhifeng Ren, David J. Smith^§, Yu Okuno^#, Tomonori Ohba^#, Hirofumi Kanoh^#, Katsumi Kaneko^#, Morinobu Endo, Humberto Terrones^†, Mildred S. Dresselhaus^& and Mauricio Terrones*^†

Advanced Materials Department, IPICYT, Camino a la Presa San Jos

2055, Col. Lomas 4a. secci

n, San Luis Potos

78216, M

xico, Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, School of Materials and Department of Physics, Arizona State University, Tempe Arizona 85287-1504, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano-shi 380-8553, Japan, Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, Molecular Chemistry Group, Department of Chemistry, Faculty of Science, Chiba University, 1-33 Yayoi, Inage-ku, Chiba-shi 263-8522, Japan, and Department of Electrical Engineering and Computer Science and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307

Nano Lett., 2008, 8 (9), pp 2773–2778

DOI: 10.1021/nl801316d

Publication Date (Web): August 14, 2008

†

Advanced Materials Department IPICYT.

‡

Department of Materials Science and Engineering, Massachusetts Institute of Technology.

Arizona State University.

Shinshu University.

Boston College.

Chiba University.

Department of Electrical Engineering and Computer Science and Department of Physics, Massachusetts Institute of Technology.

* To whom correspondence should be addressed. Fax: +52(444) 834-2010. E-mail: mterrones@ipicyt.edu.mx.

Abstract

We report the use of chemical vapor deposition (CVD) for the bulk production (grams per day) of long, thin, and highly crystalline graphene ribbons (<20−30 μm in length) exhibiting widths of 20−300 nm and small thicknesses (2−40 layers). These layers usually exhibit perfect ABAB... stacking as in graphite crystals. The structure of the ribbons has been carefully characterized by several techniques and the electronic transport and gas adsorption properties have been measured. With this material available to researchers, it should be possible to develop new applications and physicochemical phenomena associated with layered graphene.

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