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| Paper IPM / P / 12034 |
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| Abstract: | |||||||
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Carbon nanotubes (CNTs) decorated with
Cu2O particles were grown on a Ni catalyst layer
deposited on a Cu substrate by thermal chemical
vapor deposition from liquid petroleum gas. Ni
catalyst nanoparticles with different sizes were produced
in an electroplating system at 45 C using the
corrosive effect of H2SO4 which was added to
solution. These nanoparticles provide the nucleation
sites for CNT growth avoiding the need for a buffer
layer. The surface morphology of the Ni catalyst
films and CNT growth over this catalyst was studied
by scanning electron microscopy (SEM). High temperature
surface segregation of the Cu substrate into
the Ni catalyst layer and its exposition to O2 at
atmospheric environment, during the CNTs growth,
lead to the production of CNTs decorated with about
6 nmCu2O nanoparticles. We used SEM to study the
surface characteristics of Ni catalyst films and
characteristic of grown CNTs. Raman spectroscopy,
transmission electron microscopy (TEM), electron
diffraction (EDX), X-ray diffraction, and X-ray
photoelectron spectroscopy (XPS) revealed the formation
of CNTs. The selected area electron diffraction
pattern, EDX, and XPS studies show that these
CNTs were decorated with Cu2O nanoparticles. This
way of fabrication is the easiest and lowest cost
method.
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