@Article{AlmeidaDiniTravFerr:2005:ElChDo,
author = "Almeida, E. C. and Diniz, Alessandra Ven{\^a}ncio and
Trava-Airoldi, Vladimir Jesus and Ferreira, Neidenei Gomes",
affiliation = "Instituto Nacional de Pesquisas Espaciais, Laborat{\'o}rio
Associado de Sensores e Materiais, (INPE, LAS) and CTA Div Mat,
Sao Jose Dos Campos",
title = "Electrochemical characterization of doped diamond-coated carbon
fibers at different boron concentrations",
journal = "Thin Solid Films",
year = "2005",
volume = "485",
number = "1-2",
pages = "241--246",
month = "Aug.",
keywords = "carbon fibers, diamond films, doping p-type, electrode arrangement
/ VAPOR-DEPOSITED DIAMOND, POLYCRYSTALLINE DIAMOND, ELECTRODES,
FILMS, IMPEDANCE, KINETICS.",
abstract = "Doped diamond films have been deposited on carbon fibers (felt)
obtained from polyacrylonitrile at different levels of boron
doping. For a successful coating of the fibers, an ultra sonic
pretreatment in a bath of diamond powder dissolved in hexane was
required. Films were grown on both sample sides, simultaneously,
by hot filament-assisted chemical vapour deposition technique at
750 degrees C from a 0.5% H-2/CH4 mixture at a total pressure of
6.5 x 10(3) Pa. Boron was obtained from H-2 forced to pass through
a bubbler containing B2O3 dissolved in methanol. The doping level
studied corresponds to films with acceptor concentrations in the
range of 6.5 x 10(18) to 1.5 x 10(21) cm(-3), obtained from
Mott-Schottky plots. Scanning electron microscopy analyses
evidenced fibers totally covered with high quality polycrystalline
boron-doped diamond film, also confirmed by Raman spectroscopy
spectra. Diamond electrodes grown on carbon fibers demonstrated
similar electrochemical behavior obtained from films on Si
substrate, for ferri/ferrocyanide redox couple as a function of
boron content. The boron content influences electrochemical
surface area. A lower boron concentration provides a higher growth
rate that results in a higher surface area. (c) 2005 Elsevier B.V
All rights reserved..",
copyholder = "SID/SCD",
issn = "0040-6090",
language = "en",
targetfile = "electrochemical diamond.pdf",
urlaccessdate = "16 jun. 2024"
}