Substrate-free microwave synthesis of graphene: experimental conditions and hydrocarbon precursors

The effects of applied microwave power, gas flow rate and precursor composition on the substrate-free gas-phase synthesis of graphene were investigated. Graphene was produced through the delivery of ethanol droplets into argon plasmas, and a decrease in the flow rate of the gas used to generate the plasmas resulted in the formation of graphitic particles and bulk graphite structures. Carbonaceous soot particles were created by delivering isopropyl alcohol into the reactor, while no solid matter was created from methanol. Increasing the applied microwave power was found to have no effect on the structures of the synthesized materials. These findings indicated that the synthesis of graphene in the gas phase was the result of the slow inception and extremely fast growth of aromatic nuclei in the plasma afterglows.

[1]  Yuewu Zeng,et al.  Structural changes in soot particles induced by diode laser irradiation , 2006 .

[2]  D. Ugarte.  Curling and closure of graphitic networks under electron-beam irradiation , 1992, Nature.

[3]  Michael Frenklach,et al.  Reaction mechanism of soot formation in flames , 2002 .

[4]  X. B. Zhang,et al.  Generation of curved or closed-shell carbon nanostructures by ball-milling of graphite , 2000 .

[5]  Chun-Ku Chen,et al.  Impact of aerosol particles on the structure of an atmospheric pressure microwave plasma afterglow , 2002 .

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

[7]  Andre K. Geim,et al.  The rise of graphene. , 2007, Nature materials.

[8]  J. Casado,et al.  Raman spectroscopic characterization of some commercially available carbon black materials , 1995 .

[9]  S. C. O'brien,et al.  C60: Buckminsterfullerene , 1985, Nature.

[10]  SUPARNA DUTTASINHA,et al.  Graphene: Status and Prospects , 2009, Science.

[11]  D. Ugarte.  Morphology and structure of graphitic soot particles generated in arc-discharge C60 production , 1992 .

[12]  J. Flege,et al.  Epitaxial graphene on ruthenium. , 2008, Nature materials.

[13]  N. Siddique,et al.  Raman spectroscopy of carbon-containing particles , 2001 .

[14]  W. Heer,et al.  Carbon onions produced by heat treatment of carbon soot and their relation to the 217.5 nm interstellar absorption feature , 1993 .

[15]  Kwang S. Kim,et al.  Large-scale pattern growth of graphene films for stretchable transparent electrodes , 2009, Nature.

[16]  D. Gruen,et al.  Structural and chemical characterisation of soot particles formed in Ar/H2/CH4 microwave discharges during nanocrystalline diamond film synthesis , 2006 .

[17]  Ning Wang,et al.  Structural characterization of carbon nanotubes and nanoparticles by high-resolution electron microscopy , 1994 .

[18]  Paul K. Chu,et al.  Characterization of amorphous and nanocrystalline carbon films , 2006 .

[19]  Sumio Iijima,et al.  Direct observation of the tetrahedral bonding in graphitized carbon black by high resolution electron microscopy , 1980 .

[20]  T. Richardson,et al.  Clean and highly ordered graphene synthesized in the gas phase. , 2009, Chemical communications.

[21]  Masato Tomita,et al.  Growth and structure of graphitic tubules and polyhedral particles in arc-discharge , 1993 .

[22]  J. Laureyns,et al.  Raman microprobe studies on carbon materials , 1994 .

[23]  C. Berger,et al.  Electronic Confinement and Coherence in Patterned Epitaxial Graphene , 2006, Science.

[24]  J. Huang,et al.  Highly curved carbon nanostructures produced by ball-milling , 1999 .

[25]  Daniel Ugarte.  Onion-like graphitic particles , 1995 .

[26]  H. Dai,et al.  Highly conducting graphene sheets and Langmuir-Blodgett films. , 2008, Nature nanotechnology.

[27]  D. Ugarte.  High-temperature behaviour of “fullerene black” , 1994 .

[28]  R. Niessner,et al.  Raman microspectroscopic analysis of changes in the chemical structure and reactivity of soot in a diesel exhaust aftertreatment model system. , 2007, Environmental science & technology.

[29]  P. Ajayan,et al.  Balance of graphite deposition and multishell carbon nanotube growth in the carbon arc discharge , 1997 .

[30]  D. Mckenzie,et al.  EELS analysis of vacuum arc-deposited diamond-like films , 1988 .

[31]  Randy L. Vander Wal,et al.  HRTEM study of diesel soot collected from diesel particulate filters , 2007 .

[32]  Andre K. Geim,et al.  Raman spectrum of graphene and graphene layers. , 2006, Physical review letters.

[33]  W. Heer,et al.  Raman spectroscopy of closed-shell carbon particles , 1993 .

[34]  Marcelo M. Hirschler,et al.  Soot From Fires: I. Properties and Methods of Investigation , 1985 .

[35]  T. W. Żerda,et al.  Raman studies of heat-treated carbon blacks , 1994 .

[36]  G. Wallace,et al.  Processable aqueous dispersions of graphene nanosheets. , 2008, Nature nanotechnology.

[37]  G. Hirata,et al.  Study of different forms of carbon by analytical electron microscopy , 1999 .

[38]  Lawrence E Murr,et al.  A TEM study of soot, carbon nanotubes, and related fullerene nanopolyhedra in common fuel-gas combustion sources , 2005 .

[39]  W. Goddard,et al.  Structural Modification of Single-Layer Carbon Nanotubes with an Electron Beam , 1996 .

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

[41]  K. Novoselov,et al.  Raman Fingerprint of Charged Impurities in Graphene , 2007, 0709.2566.

[42]  S. Stankovich,et al.  Stable aqueous dispersions of graphitic nanoplatelets via the reduction of exfoliated graphite oxide in the presence of poly(sodium 4-styrenesulfonate) , 2006 .

[43]  Jannik C. Meyer,et al.  The structure of suspended graphene sheets , 2007, Nature.

[44]  Tiago L. Farias,et al.  Fractal and projected structure properties of soot aggregates , 1995 .

[45]  Michael Frenklach,et al.  Detailed kinetic Monte Carlo simulations of graphene-edge growth. , 2010, The journal of physical chemistry. A.

[46]  A. Ferrari,et al.  Raman spectroscopy of graphene and graphite: Disorder, electron phonon coupling, doping and nonadiabatic effects , 2007 .

[47]  M. Hajaligol,et al.  HRTEM investigation of some commercially available furnace carbon blacks , 2004 .