Nanocrystalline Diamond on a-SiO2 Fiber: a New Class of Hybrid Material
; Titus, E.T.
Mendes, J. C.
; Cabral, G.C.
; Shokufar, T.S.
; Neto, V. Neto
Diamond and Related Materials Vol. 17, Nº 7-10, pp. 1106 - 1109, July, 2008.
ISSN (print): 0925-9635
Journal Impact Factor: 1,913 (in 2011)
Digital Object Identifier: 10.1016/j.diamond.2008.02.023
We report a template technique for the fabrication of high density nanocrystalline diamond (NCD)-coated silica (a-SiO2) nanofibers with diameters of 1–5 μm. This method includes the synthesis of templates (a-SiO2 nanofibers) by conventional Vapor–Liquid–Solid method and the conformal coating of the nanofibers with nanodiamond by Microwave Plasma Chemical Vapor Deposition technique in hydrogen-deficient conditions. A detailed micro-structural analysis was performed to probe the interaction of the NCD grains with a-SiO2 nanofibers. The specimen for Transmission Electron Microscopy was prepared using Focused Ion Beam lift-out method. Room temperature micro-Raman was performed to study the crystalline quality of the NCD-coated silica nanofibers. Field electron emission of as-synthesized NCD-coated silica nanofibers was observed with a threshold field of ~ 3 V/µm.