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

Journal Article · Mon Aug 24 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4929587· OSTI ID:22489173

Yeh, Chien-Jui; Leou, Keh-Chyang ^[1]; Manoharan, Divinah; Chang, Hsin-Tzer; Lin, I-Nan ^[2]

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1. Department of Engineering and System Science, National Tsing Hua University, Hsinchu 300, Taiwan (China)
2. Department of Physics, Tamkang University, Tamsui 251, Taiwan (China)

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 CH{sub 4}/N{sub 2} plasma ppt-processed films exhibit high conductivity of σ = 1099 S/cm as well as excellent EFE properties with turn-on field of E{sub 0} = 2.48 V/μm (J{sub e} = 1.0 mA/cm{sup 2} at 6.5 V/μm). The ppt of UNCD film is simple and robust process that is especially useful for device applications.

• OSTI ID: 22489173
• Journal Information: Applied Physics Letters, Vol. 107, Issue 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPOSITE MATERIALS
DIAMONDS
FIELD EMISSION
FILMS
GRAPHITE
LAYERS
METHANE
NANOMATERIALS
PLASMA
SUBSTRATES
SYNTHESIS