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One
of the SWNT (single walled carbon
nanotube)
types, with an irregular horn-like shape, which may be a critical component
of a new generation
of fuel cells.
"The main characteristic of the carbon
nanohorns
is that when many of the nanohorns
group
together an aggregate
(a secondary particle) of about 100 nanometers is created. The advantage being, that
when used as an electrode for a fuel cell,
not only is the surface area extremely large, but also, it is easy for the
gas and liquid to permeate to the inside. In addition, compared with normal nanotubes,
because the nanohorns
are easily prepared with high purity it is expected to become a low-cost raw
material." See NEC uses Carbon
Nanotubes
to Develop a Tiny Fuel Cell
for Mobile Applications
and here is a TEM image.
Source
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