A Raman spectroscopic investigation of graphite oxide derived graphene

AIP Advances - Tập 2 Số 3 - 2012
Adarsh Kaniyoor1, S. Ramaprabhu1
1Indian Institute of Technology Madras (IIT M) Alternative Energy and Nanotechnology Laboratory (AENL), Nano Functional Materials Technology Centre (NFMTC), Department of Physics, , Chennai 600036, India

Tóm tắt

Graphene sheets that are now routinely obtained by the exfoliation/reduction of graphite oxide exhibit Raman spectra unlike traditional graphene systems. The general attributes of the Raman spectra of these ‘wrinkled graphene’ are first reaffirmed by evaluating the spectra of samples prepared by seven different exfoliation-reduction methods. These graphene sheets exhibit highly broadened D and G Raman bands and in addition, have a modulated bump in place of the conventional 2D (G′) band. It is shown that the high wavenumber ‘bump’ can be resolved into the conventional 2D band and several defect activated peaks such as G*, D+D′ and 2D′. The broad G band could also be deconvoluted into the actual G band and the D′ band, thereby attributing the broadening in the G band to the presence of this defect activated band. Two additional modes, named as D* at 1190 cm-1 and D** at ∼1500 cm-1 could be identified. These peculiar features in the Raman spectrum of ‘graphene’ are attributed to the highly disordered and wrinkled (defective) morphology of the sheets. The affect of defects are further augmented due to the finite crystallite size of these graphene sheets. The dispersion in the band positions and peak intensities with respect to the laser energy are also demonstrated.

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Tài liệu tham khảo

1986, Carbon, 24, 241, 10.1016/0008-6223(86)90126-0

1987, Rev. Chim. Minér., 24, 572

2004, Science, 306, 666, 10.1126/science.1102896

2006, Nat. Mater., 6, 183, 10.1038/nmat1849

2007, Nat. Mater., 6, 198, 10.1038/nmat1846

2010, Carbon, 48, 1088, 10.1016/j.carbon.2010.02.005

2010, Adv. Mater., 22, 3235, 10.1002/adma.201090099

2005, J. Mater. Chem., 15, 974, 10.1039/b413029d

2009, J. Am. Chem. Soc., 131, 3611, 10.1021/ja807449u

2010, Langmuir, 26, 9045, 10.1021/la9049082

2006, J. Phys. Chem. B, 110, 8535, 10.1021/jp060936f

2007, Chem. Mater., 19, 4396, 10.1021/cm0630800

2009, J. Phys. Chem. B, 3, 3730

2010, J. Mater. Chem., 20, 8467, 10.1039/c0jm01876g

2011, J. Mater. Chem., 21, 5392, 10.1039/c1jm10099h

2011, J. Phys. Chem. C, 115, 17660, 10.1021/jp204039k

2007, Carbon, 45, 1558, 10.1016/j.carbon.2007.02.034

2010, Carbon, 48, 2118, 10.1016/j.carbon.2010.02.001

2011, Appl. Phys. Lett., 98, 173108, 10.1063/1.3584021

2011, J. Mater. Chem., 21, 6800, 10.1039/c1jm10808e

2011, Appl. Phys. Lett., 98, 183111, 10.1063/1.3587639

2011, AIP Advances, 1, 032152, 10.1063/1.3638178

2011, AIP Advances, 2, 022101, 10.1063/1.3702588

2012, J. Mater. Chem., 21, 17654, 10.1039/c1jm13934g

2004, Philos. T. Roy. Soc. A, 362, 2271, 10.1098/rsta.2004.1454

2007, Phys. Chem. Chem. Phys., 9, 1276, 10.1039/b613962k

2009, Phys. Rep., 473, 51, 10.1016/j.physrep.2009.02.003

2007, Solid State Commun., 143, 47, 10.1016/j.ssc.2007.03.052

2006, Phys. Rev. Lett., 97, 187401, 10.1103/PhysRevLett.97.187401

2008, Nano Lett., 8, 36, 10.1021/nl071822y

2008, J. Mater. Chem., 8, 1517, 10.1039/b716536f

2010, J. Phys. Chem. C, 114, 16168, 10.1021/jp103134u

2010, J. Phys. Chem. Lett., 1, 2804, 10.1021/jz1011143

2009, Nat. Nanotech., 4, 30, 10.1038/nnano.2008.365

2009, ACS Nano, 3, 301, 10.1021/nn800593m

2010, Fuel, 89, 1903, 10.1016/j.fuel.2010.03.036

2009, Chem. of Mater., 21, 5674, 10.1021/cm902182y

2011, Phys. Chem. Chem. Phys., 13, 21116, 10.1039/c1cp22727k

2010, Adv. Mater., 22, 4877, 10.1002/adma.201001798

2010, J. Power Sources, 195, 4600, 10.1016/j.jpowsour.2010.02.044

See supplementary material at http://dx.doi.org/10.1063/1.4756995 for desription of Raman spectrum of single layer graphene, characterization of wrinkled graphene, morphology of f-HEG and GO, and effect of laser on Raman spectra.

2008, B. Mater. Sci., 31, 579, 10.1007/s12034-008-0090-5

2008, Carbon, 46, 272, 10.1016/j.carbon.2007.11.015

2010, Phys. Rev. B, 82, 125429, 10.1103/PhysRevB.82.125429

2011, Nano Lett., 11, 3190, 10.1021/nl201432g

1995, Phys. Rev. B, 52, 10053, 10.1103/PhysRevB.52.10053

1990, J. Appl. Phys., 80, 440, 10.1063/1.362745

1990, Phys. Rev. B, 41, 3738, 10.1103/PhysRevB.41.3738

1975, Introduction to Infrared and Raman Spectroscopy

2000, Phys. Rev. B, 63, 121405, 10.1103/PhysRevB.63.121405

2009, Phys. Rev. B, 80, 125404, 10.1103/PhysRevB.80.125404

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