Formation of needlelike crystallites during growth of diamond films by chemical vapor deposition

Journal Article · Thu Jul 15 00:00:00 EDT 2010 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774510040292· OSTI ID:22051173

Kopylov, P G; Shvets, P V ^[1]

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1. Moscow State University (Russian Federation)

Diamond polycrystalline films have been grown by chemical vapor deposition from a hydrogenmethane mixture. The phase composition and structure of the films were studied using Raman spectroscopy, electron microscopy, and thermogravimetry. It is found that, upon heating in air, the oxidation of the carbon material forming the films occurs at significantly different temperatures, depending on the degree of its order and the crystallite size. This difference is used for selective oxidation of the least ordered fine-grained component of the films. The material obtained by this selective oxidation of the films consists of diamond crystallites shaped like regular micrometer-sized tetragonal pyramids with a radius of tip curvature of several nanometers.

• OSTI ID: 22051173
• Journal Information: Crystallography Reports, Vol. 55, Issue 4; Other Information: Copyright (c) 2010 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHEMICAL VAPOR DEPOSITION
CRYSTAL GROWTH
DIAMONDS
ELECTRON MICROSCOPY
FILMS
HEATING
HYDROGEN
METHANE
MIXTURES
OXIDATION
POLYCRYSTALS
RAMAN SPECTROSCOPY
THERMAL GRAVIMETRIC ANALYSIS