4.6 Article

Synthesis of ultra-nano-carbon composite materials with extremely high conductivity by plasma post-treatment process of ultrananocrystalline diamond films

Journal

APPLIED PHYSICS LETTERS
Volume 107, Issue 8, Pages -

Publisher

AMER INST PHYSICS
DOI: 10.1063/1.4929587

Keywords

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Funding

  1. Ministry of Science and Technology, Republic of China [MOST 103-2112-M-032-002]

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Needle-like diamond grains encased in nano-graphitic layers are an ideal granular structure of diamond films to achieve high conductivity and superior electron field emission (EFE) properties. This paper describes the plasma post-treatment (ppt) of ultrananocrystalline diamond (UNCD) films at low substrate temperature to achieve such a unique granular structure. The CH4/N-2 plasma ppt-processed films exhibit high conductivity of sigma = 1099 S/cm as well as excellent EFE properties with turn-on field of E-0 = 2.48 V/mu m (J(e) = 1.0 mA/cm(2) at 6.5 V/mu m). The ppt of UNCD film is simple and robust process that is especially useful for device applications. (C) 2015 AIP Publishing LLC.

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