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Ex‐situ synthesized nickel nanoparticles for multi‐walled carbon nanotube growth on high aspect ratio substrates
Author(s) -
Ansaldo Alberto,
George Chandramohan,
Parodi Maria Teresa,
Zitti Ermanno Di,
Roth Siegmar,
Ricci Davide
Publication year - 2008
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200879620
Subject(s) - materials science , carbon nanotube , wafer , nanoparticle , nickel , silicon , nanotechnology , tungsten , carbon fibers , chemical engineering , catalysis , inkwell , nickel oxide , composite material , metallurgy , chemistry , organic chemistry , composite number , engineering
An ink made from ex‐situ synthesized nickel nanoparticles suspended in hexane is proposed as catalyst for the growth of carbon nanotubes onto high aspect ratio surfaces. The functionality of the ink as precursor has been at first checked onto standard flat surfaces such as silicon oxide onto a silicon wafer, were thick mats of multi‐walled carbon nanotubes have been obtained from ink droplets on the surface. Tungsten electrodes, made from thin wires that have been electrochemically etched to produce sharpened tips, have been treated by dip‐coating using the same nanoparticle ink. On such samples, multi‐walled carbon nanotubes have been grown directly on the metal surface with different surface coverage depending on the nickel nanoparticle concentration in the ink. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)