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Deposition of Nano-Crystalline Diamond Films of Spherical Shell

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Nano-crystalline diamond film of spherical shell has been synthesized on convex molybdenum substrate by direct current plasma chemical vapor deposition from Ar-hydrogen-methane mixture. Substrate temperature was accurately monitored by controlling torch power and the cooling water flow rate. Reaction chamber with methane, hydrogen and argon source gas mixture and the total pressure was 5000 Pa, and the CH4 concentration (volumetric percentage of CH4 to H2 flow rate) was 1.5–5%. Temperature of substrate was about 840–930 °C. Atom force microscopy (AFM), energy disperse spectroscopy (EDS), field emission scanning electron microscopy (FESEM), Raman spectroscopy, and roughness-profile meter were investigated microstructure, purities, surface phase and surface roughness of diamond film, respectively. The results show that, when diamond film of spherical shell grew by three steps depositing technologies, the average grain sizes of diamond film was observed to be approximatelhy in the range of 15–35 nm, and there were no remarkable big grain in the whole surface of diamond film. Smooth nanocrystalline diamond film of spherical shell was successfully deposited.
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Keywords: DCPCVD; DIAMOND FILM OF SPHERICAL SHELL; MICROSTRUCTURE; NANO-CRYSTALLINE; SURFACE ROUGHNESS

Document Type: Research Article

Publication date: September 1, 2012

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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