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

Author

Chien-Jui Yeh, Manoharan, Divinah, Hsin-Tzer Chang, Keh-Chyang Leou, and I-Nan Lin

Subjects
*CHEMICAL synthesis, *CARBON composites, *NANOSTRUCTURED materials, *DIAMOND films, *ELECTRIC conductivity, *PLASMA gases, *NANOCRYSTALS
Abstract

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/N2 plasma ppt-processed films exhibit high conductivity of σ = 1099 S/cm as well as excellent EFE properties with turn-on field of E0 = 2.48 V/μm (Je = 1.0 mA/cm² at 6.5 V/μm). The ppt of UNCD film is simple and robust process that is especially useful for device applications. [ABSTRACT FROM AUTHOR]

Published
2015
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