Characterization of Graphene Nanoribbons from the Unzipping of MWCNTs

Graphene nanoribbons were obtained by oxidative unzipping reaction conducted on multi-walled carbon nanotubes (MWCNTs). The oxidized and reduced nanoribbons (after treatment with hydrazine) were characterized by FT-IR and Raman spectroscopy. Graphite oxide was used as reference material in FT-IR and highly oriented pyrolytic graphite was used as reference in the Raman study. The transmission electron microscopy (TEM) of the nanoribbons both in oxidized and reduced form show beautiful images confirming the single graphene structure of the nanoribbons. When heated in a thermobalance at 10°C/min under N2, the oxidized nanoribbons undergo an explosive decomposition at 152°C with formation of a fluffy carbon soot whose FT-IR spectrum is analogous to that of the hydrazine reduced nanoribbons.

[1]  R. Car,et al.  Raman spectra of graphite oxide and functionalized graphene sheets. , 2008, Nano letters.

[2]  S. Stankovich,et al.  Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide , 2007 .

[3]  P. Thordarson,et al.  Gram-scale production of graphene based on solvothermal synthesis and sonication. , 2009, Nature nanotechnology.

[4]  Michel Mermoux,et al.  FTIR and 13C NMR study of graphite oxide , 1991 .

[5]  Gui Yu,et al.  Synthesis of N-doped graphene by chemical vapor deposition and its electrical properties. , 2009, Nano letters.

[6]  L. Calcagno,et al.  Structural disorder in ion irradiated carbon materials , 1994 .

[7]  M. Terrones.  Materials science: Nanotubes unzipped , 2009, Nature.

[8]  G. Compagnini,et al.  Ion irradiation and defect formation in single layer graphene , 2009 .

[9]  Andre K. Geim,et al.  Electric Field Effect in Atomically Thin Carbon Films , 2004, Science.

[10]  Mild sonochemical exfoliation of bromine-intercalated graphite: a new route towards graphene , 2009, 0905.4451.

[11]  G. Compagnini,et al.  sp/sp2 bonding ratio in sp rich amorphous carbon thin films , 2006 .

[12]  J. Klinowski,et al.  13C and 1H MAS NMR studies of graphite oxide and its chemically modified derivatives , 1997 .

[13]  S. Banerjee,et al.  Large-Area Synthesis of High-Quality and Uniform Graphene Films on Copper Foils , 2009, Science.

[14]  Andre K. Geim,et al.  Two-dimensional atomic crystals. , 2005, Proceedings of the National Academy of Sciences of the United States of America.

[15]  H. Dai,et al.  Narrow graphene nanoribbons from carbon nanotubes , 2009, Nature.

[16]  D. Lin-Vien.  The Handbook of Infrared and Raman Characteristic Frequencies of Organic Molecules , 1991 .

[17]  David J. Smith,et al.  Ex-MWNTs: graphene sheets and ribbons produced by lithium intercalation and exfoliation of carbon nanotubes. , 2009, Nano letters.

[18]  A. K. Sood,et al.  Graphene: The New Two‐Dimensional Nanomaterial , 2009 .

[19]  Tsuyoshi Nakajima,et al.  Formation process and structure of graphite oxide , 1994 .

[20]  Soumen Karmakar,et al.  A novel approach towards selective bulk synthesis of few-layer graphenes in an electric arc , 2008 .

[21]  F. Cataldo.  The role of Raman spectroscopy in the research on sp‐hybridized carbon chains: carbynoid structures polyynes and metal polyynides , 2008 .

[22]  J. Tour,et al.  Longitudinal unzipping of carbon nanotubes to form graphene nanoribbons , 2009, Nature.

[23]  Dongmin Chen,et al.  Synthesis and Solid-State NMR Structural Characterization of 13C-Labeled Graphite Oxide , 2008, Science.

[24]  M. Fanetti,et al.  Growth of curved graphene sheets on graphite by chemical vapor deposition , 2009 .

[25]  K. Loh,et al.  One-pot synthesis of fluorescent carbon nanoribbons, nanoparticles, and graphene by the exfoliation of graphite in ionic liquids. , 2009, ACS nano.

[26]  F. Cataldo.  A Raman study on radiation-damaged graphite by γ-rays , 2000 .

[27]  R. P. Swatloski,et al.  Recent progress in graphene-related nanotechnologies. , 2009, Recent patents on nanotechnology.

[28]  A. Hamwi,et al.  Some chemical and electrochemical properties of graphite oxide , 1996 .

[29]  I. Dékány,et al.  DRIFT study of deuterium-exchanged graphite oxide , 2005 .