Ultrahigh-Speed Synthesis of Nanographene Using Alcohol In-Liquid Plasma

Ultrahigh-speed synthesis of high-crystallinity nanographene was realized using an alcohol in-liquid plasma, which was generated from a nonequilibrium microhollow atmospheric-pressure plasma with an ultrahigh electron density. The synthesis rates of carbon materials were 0.61 and 1.72 mg/min using ethanol and butanol, respectively. Multilayer nanographene structures obtained using ethanol had an interlayer spacing of 0.33 nm, corresponding to that of (002) planes in graphite. The G-, D-, D'-, and 2D-band peaks in the Raman spectrum also confirmed the formation of nanographene. The mechanism of gradual growth of six-membered ring structures was clarified by gas chromatography of the filtrate.

[1]  F. Tuinstra,et al.  Raman Spectrum of Graphite , 1970 .

[2]  M. Hori,et al.  Nonequilibrium atmospheric pressure plasma with ultrahigh electron density and high performance for glass surface cleaning , 2008 .

[3]  Yihong Wu,et al.  Raman Studies of Monolayer Graphene: The Substrate Effect , 2008 .

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

[5]  Peter Koidl,et al.  CVD-diamond optical lenses , 2001 .

[6]  Xianbao Wang,et al.  Large‐Scale Synthesis of Few‐Layered Graphene using CVD , 2009 .

[7]  Masayoshi Umeno,et al.  Planer nano-graphenes from camphor by CVD , 2006 .

[8]  A. Reina,et al.  Large area, few-layer graphene films on arbitrary substrates by chemical vapor deposition. , 2009, Nano letters.

[9]  S. Nomura,et al.  Sonoplasma generated by a combination of ultrasonic waves and microwave irradiation , 2003 .

[10]  Yu Huang,et al.  Sub-100 nm channel length graphene transistors. , 2010, Nano letters.

[11]  C. Berger,et al.  Approaching the dirac point in high-mobility multilayer epitaxial graphene. , 2008, Physical review letters.

[12]  Curt M. White,et al.  Retention indices for programmed-temperature capillary-column gas chromatography of polycyclic aromatic hydrocarbons , 1979 .

[13]  M. Hori,et al.  Vacuum ultraviolet absorption spectroscopy employing a microdiacharge hollow-cathode lamp for absolute density measurements of hydrogen atoms in reactive plasmas , 1999 .

[14]  S. N. Vlasov,et al.  The absorption investigation in CVD-diamond plates and windows at 50-200 GHz , 2002 .

[15]  C. Rao,et al.  Simple Method of Preparing Graphene Flakes by an Arc-Discharge Method , 2009 .

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

[17]  C. Cao,et al.  Deposition of unbydrogenated diamond-like amorphous carbon films by electrolysis of organic solutions , 1997 .

[18]  D. B. Fischbach,et al.  Observation of Raman band shifting with excitation wavelength for carbons and graphites , 1981 .

[19]  G. Fudenberg,et al.  Ultrahigh electron mobility in suspended graphene , 2008, 0802.2389.

[20]  K. Müllen,et al.  Transparent, conductive graphene electrodes for dye-sensitized solar cells. , 2008, Nano letters.

[21]  M. Dresselhaus,et al.  Perspectives on carbon nanotubes and graphene Raman spectroscopy. , 2010, Nano letters.

[22]  S. E. S. E. Wakkad,et al.  Solubility and Particle Size from a Study on Silver Oxide. , 1949 .

[23]  S. Iijima.  Helical microtubules of graphitic carbon , 1991, Nature.

[24]  Bei Wang,et al.  FACILE SYNTHESIS AND CHARACTERIZATION OF GRAPHENE NANOSHEETS , 2008 .