Wet-etched Ni foils as active catalysts towards carbon nanofiber growth
authors Mata, D; Ferro, M; Fernandes, AJS; Amaral, M; Oliveira, FJ; Costa, PMFJ; Silva, RF
nationality International
journal CARBON
keywords CHEMICAL-VAPOR-DEPOSITION; HETEROGENEOUS CATALYSIS; FILAMENTOUS CARBON; RAMAN-SPECTROSCOPY; NANOTUBE GROWTH; THERMAL CVD; SURFACE; COMPOSITES; IRON; DECOMPOSITION
abstract A study of wet-chemical etching treatments for nickel foils and the growth parameters for carbon nanostructures on them using hot-filament chemical vapour deposition (CVD) is described. Catalytically-active protrusions were produced on the Ni foils with sizes and densities in the range similar to 24-42 nm and similar to 202-314 P mu m(-2), respectively. These protrusions are found to have a key role in the growth process as they determine the yield and morphology of the carbon deposits. It is shown that well-shaped, nano-sized protrusions are required to achieve high yield growth of hollow-herringbone carbon nanofibers (CNFs) with an in-plane crystallite size of similar to 23 nm. Good correlation was seen between the statistical distributions of the protrusion size (sp) and the CNF diameters (df) depicting sp/df ratios close to unity. This work sheds light on the mechanisms behind CVD growth on metal foils. (C) 2010 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0008-6223
year published 2010
volume 48
issue 10
beginning page 2839
ending page 2854
digital object identifier (doi) 10.1016/j.carbon.2010.04.016
web of science category Chemistry, Physical; Materials Science, Multidisciplinary
subject category Chemistry; Materials Science
unique article identifier WOS:000279443900018
  ciceco authors
  impact metrics
times cited (wos core): 13
journal impact factor (jcr 2016): 6.337
5 year journal impact factor (jcr 2016): 6.834
category normalized journal impact factor percentile (jcr 2016): 86.514
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