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Applied Physics Letters / Volume 85 / Issue 7 / NANOSCALE SCIENCE AND DESIGN

Appl. Phys. Lett. 85, 1265 (2004); http://dx.doi.org/10.1063/1.1782253 (3 pages)

Free-standing subnanometer graphite sheets

J. J. Wang1, M. Y. Zhu1, R. A. Outlaw1, X. Zhao1, D. M. Manos1, B. C. Holloway1, and V. P. Mammana2

1Department of Applied Science, College of William and Mary, Williamsburg, Virginia 23187-8795
2International Technology Center, Raleigh, North Carolina 27709-3704

(Received 31 March 2004; accepted 15 June 2004)

Free-standing graphite sheets with thickness less than 1 nm, “carbon nanosheets,” were synthesized on a variety of substrates by radio-frequency plasma-enhanced chemical vapor deposition without any catalyst or special substrate treatment. The nanosheets consist of one to three graphene layers with a large smooth surface topography, standing roughly vertical to the substrate. Due to the atomic thickness and corrugated nature of nanosheets, low-energy vibrational modes are present in the Raman spectra. The low turn-on field of 4.7 V/μm for electron field emission suggests that the carbon nanosheets could be used as a potential edge emitter.

© 2004 American Institute of Physics

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KEYWORDS and PACS

Keywords

graphite, nanostructured materials, plasma CVD, surface topography, vibrational modes, Raman spectra, electron field emission, surface treatment

PACS

  • 81.07.Bc

    Nanocrystalline materials

  • 61.46.-w

    Structure of nanoscale materials

  • 81.15.Gh

    Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.)

  • 68.35.B-

    Structure of clean surfaces (and surface reconstruction)

  • 63.22.-m

    Phonons or vibrational states in low-dimensional structures and nanoscale materials

  • 78.30.Hv

    Other nonmetallic inorganics

  • 79.70.+q

    Field emission, ionization, evaporation, and desorption

  • 81.65.-b

    Surface treatments

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.1782253

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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