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Type: Artigo de evento
Title: Fabrication Of Tubes Of Diamond With Micrometric Diameters And Their Characterization
Author: Baranauskas V.
Ceragioli H.J.
Peterlevitz A.C.
Abstract: The fabrication and characterization of 'self-supporting' diamond tubes grown by chemical vapor deposition (CVD) are reported. Diamond layers were deposited onto tungsten wires with diameters of 238 μm; the tungsten cores were subsequently completely removed by etching to leave 'self-supporting' diamond tubes with a diameter of approximately 400 μm and length of 20 mm. A hot-filament CVD system fed with ethanol highly diluted in hydrogen was employed. Growth rates of 7.8 μm h-1 have been measured and incubation times >3 h have been estimated. Scanning electron microscopy of cross-sections revealed columnar structures, which terminate on sharp (111) facets on the tube's external surface. Raman spectroscopy showed that the tube structure is predominantly composed of C-C sp3 bonds, with intrinsic tensile stresses. © 2002 Elsevier Science B.V. All rights reserved.
Citation: Thin Solid Films. , v. 420-421, n. , p. 151 - 154, 2002.
Rights: fechado
Identifier DOI: 10.1016/S0040-6090(02)00790-3
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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