The effect of degree of reduction on the electrical properties of functionalized graphene sheets

We study the effect of carbon to oxygen ratio (C/O) on the electrical resistance of functionalized graphene sheets prepared by thermal exfoliation and reduction of graphite oxide at various temperatures. Using a 2-probe technique in conjunction with Kelvin probe force microscopy, we observe a transition from high-resistance (>400 kΩ/sq) nonlinear current/voltage characteristics at low C/O to low-resistance (<10 kΩ/sq) linear behavior at high C/O, indicating a transition from hopping to diffusive electron transport. Simultaneously, the metal-graphene contacts change from high-resistance Schottky-type behavior to nearly non-invasive metal-metal contact characteristics.

[1]  Ilhan A. Aksay,et al.  Multifunctional elastomer nanocomposites with functionalized graphene single sheets , 2012 .

[2]  I. Aksay,et al.  Functionalized graphene sheets as a versatile replacement for platinum in dye-sensitized solar cells. , 2012, ACS applied materials & interfaces.

[3]  Rui Wang,et al.  Nanoscale charge distribution and energy band modification in defect-patterned graphene. , 2012, Nanoscale.

[4]  Wei Yang,et al.  Effect of temperature and time on the exfoliation and de-oxygenation of graphite oxide by thermal reduction , 2012, Journal of Materials Science.

[5]  J. Tour,et al.  Pristine graphite oxide. , 2012, Journal of the American Chemical Society.

[6]  L. Lauhon,et al.  Direct measurement of nanowire Schottky junction depletion region , 2011 .

[7]  W. Bennett,et al.  Hierarchically porous graphene as a lithium-air battery electrode. , 2011, Nano letters.

[8]  I. Aksay,et al.  Intrinsic Capacitance and Redox Activity of Functionalized Graphene Sheets , 2011 .

[9]  Rosanna Larciprete,et al.  Dual path mechanism in the thermal reduction of graphene oxide. , 2011, Journal of the American Chemical Society.

[10]  Wolfgang Mertin,et al.  Local voltage drop in a single functionalized graphene sheet characterized by Kelvin probe force microscopy. , 2011, Nano letters.

[11]  Jinlong Yang,et al.  Structure of Graphene Oxide: Thermodynamics versus Kinetics , 2011, 1102.3797.

[12]  R. Ruoff,et al.  Graphene-based polymer nanocomposites , 2011 .

[13]  Jun Liu,et al.  Electrochemical Performance of Graphene as Effected by Electrode Porosity and Graphene Functionalization , 2010 .

[14]  G. Flynn,et al.  Atmospheric oxygen binding and hole doping in deformed graphene on a SiO₂ substrate. , 2010, Nano letters.

[15]  Rolf Erni,et al.  Determination of the Local Chemical Structure of Graphene Oxide and Reduced Graphene Oxide , 2010, Advanced materials.

[16]  Christian Punckt,et al.  Functionalized graphene as a catalytic counter electrode in dye-sensitized solar cells. , 2010, ACS nano.

[17]  F. Guinea,et al.  Limits on charge carrier mobility in suspended graphene due to flexural phonons. , 2010, Physical review letters.

[18]  W. Lu,et al.  Improved synthesis of graphene oxide. , 2010, ACS nano.

[19]  Vivek B Shenoy,et al.  Structural evolution during the reduction of chemically derived graphene oxide. , 2010, Nature chemistry.

[20]  Yuyan Shao,et al.  Graphene Based Electrochemical Sensors and Biosensors: A Review , 2010 .

[21]  S. Nguyen,et al.  Graphene oxide, highly reduced graphene oxide, and graphene: versatile building blocks for carbon-based materials. , 2010, Small.

[22]  Gaetano Granozzi,et al.  Evolution of Electrical, Chemical, and Structural Properties of Transparent and Conducting Chemically Derived Graphene Thin Films , 2009 .

[23]  M. Chou,et al.  Structural and electronic properties of oxidized graphene. , 2009, Physical review letters.

[24]  S. Dong,et al.  Electrochemical sensing and biosensing platform based on chemically reduced graphene oxide. , 2009, Analytical chemistry.

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

[26]  Jian‐Hao Chen,et al.  Defect scattering in graphene. , 2009, Physical review letters.

[27]  M. Dresselhaus,et al.  Thermal stability studies of CVD-grown graphene nanoribbons: Defect annealing and loop formation , 2009 .

[28]  R. Car,et al.  Bending properties of single functionalized graphene sheets probed by atomic force microscopy. , 2008, ACS nano.

[29]  Inhwa Jung,et al.  Tunable electrical conductivity of individual graphene oxide sheets reduced at "low" temperatures. , 2008, Nano letters.

[30]  R. Ruoff,et al.  Graphene-based ultracapacitors. , 2008, Nano letters.

[31]  Xiaosong Wu,et al.  Epitaxial-graphene/graphene-oxide junction: an essential step towards epitaxial graphene electronics. , 2007, Physical review letters.

[32]  S. Xiao,et al.  Intrinsic and extrinsic performance limits of graphene devices on SiO2. , 2007, Nature nanotechnology.

[33]  Klaus Kern,et al.  Electronic transport properties of individual chemically reduced graphene oxide sheets. , 2007, Nano letters.

[34]  F. Guinea,et al.  The electronic properties of graphene , 2007, Reviews of Modern Physics.

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

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

[37]  K. Novoselov,et al.  Detection of individual gas molecules adsorbed on graphene. , 2006, Nature materials.

[38]  R. Car,et al.  Oxygen-driven unzipping of graphitic materials. , 2006, Physical review letters.

[39]  Roberto Car,et al.  Functionalized single graphene sheets derived from splitting graphite oxide. , 2006, The journal of physical chemistry. B.

[40]  A. Geim,et al.  Two-dimensional gas of massless Dirac fermions in graphene , 2005, Nature.

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

[42]  Sascha Sadewasser,et al.  Amplitude or frequency modulation-detection in Kelvin probe force microscopy , 2003 .

[43]  P. J. Ollivier,et al.  Layer-by-Layer Assembly of Ultrathin Composite Films from Micron-Sized Graphite Oxide Sheets and Polycations , 1999 .

[44]  H. K. Wickramasinghe,et al.  Kelvin probe force microscopy , 1991 .

[45]  H. Boehm.,et al.  Untersuchungen am Graphitoxid. VI. Betrachtungen zur Struktur des Graphitoxids , 1969 .

[46]  R. Ruoff,et al.  The chemistry of graphene oxide. , 2010, Chemical Society reviews.

[47]  S. Stankovich,et al.  Chemical analysis of graphene oxide films after heat and chemical treatments by X-ray photoelectron and Micro-Raman spectroscopy , 2009 .

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

[49]  Masahiro Fujiwara,et al.  Thin-film particles of graphite oxide 1:: High-yield synthesis and flexibility of the particles , 2004 .