Single Walled Carbon Nanotube purification techniques evaluated by Raman and Infrared Spectroscopy, and Nanotube application in Gas Chromatography
Subjects
Single Walled Carbon Nanotube; Raman Spectroscopy; Infrared Spectroscopy; Nanotube; Gas ChromatographyAbstract
Understanding
how
purification
steps
affect
single
walled
carbon
nanotubes
(SWNTs)
is
vital
to
further
use
of
these
nanotubes
in
other
chemical
techniques
such
as
gas
chromatography
(GC),
synthesis,
probes,
biosensors
and
high
strength
materials.
When
SWNTs
are
produced
using
arc
discharge,
they
often
contain
contaminants
such
as
amorphous
carbon
and
additional
functional
groups,
which
must
be
removed
using
a
multi-‐step
chemical
purification
process.
Using
Raman
and
IR
spectroscopy
together
showed
the
effect
that
each
step
of
chemical
processing
had
on
the
carbon
skeleton
leading
to
a
greater
understanding
of
the
production
of
purified
carbon
nanotubes.
After
purification,
these
SWNTs
can
be
used
to
improve
other
chemistry
techniques
such
as
GC.
Combining
these
SWNTs
with
ionic
liquid
for
the
stationary
phase
in
GC,
results
in
improved
resolution
of
mixtures
containing
aromatics,
alcohols
and
alkanes.
After
understanding
exactly
how
purification
affects
SWNTs,
these
nanotubes
can
then
be
adapted
to
further
improve
chemistry
techniques
such
as
GC
and
many
other
uses.
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