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Multiwalled carbon nanotubes (MWNTs) were synthesized using a hot filament assisted chemical vapor deposition (CVD) at the atmospheric pressure at a substrate temperature of 550°C. The size of nanotubes was controlled by changing the size of catalyst particles. The structure and composition of these nanotubes were investigated using scanning electron microscopy, transmission electron microscopy, and...
The hydrogen sensing properties of multi-walled carbon nanotubes (MWNTs) synthesized by a hot filament CVD process are reported in this paper. The MWNTs were synthesized by a hot filament assisted chemical vapor deposition method using cobalt oxide nanoparticles as the catalyst on SiO 2 surfaces. The MWNTs were characterized with Raman spectroscopy and scanning electron microscopy. Two-terminal...
Hydrogen sensitivity of as-deposited multiwalled carbon nanotubes (MWNTs) was investigated. The MWNTs were directly coated between microfabricated gold electrodes by a catalytic chemical vapor deposition at 600degC using methane as the monomer. The MWNTs exhibited a higher response > 50% and faster response than conventional metal oxides-based gas sensors in law temperature range of 150-300degC...
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