Biomedical Engineering Reference
In-Depth Information
the temperature of maximum NO
gas sensitivity for CNTs loaded
with Au nanoclusters of 5 nm was 200°C. Good repeatability of the
electrical response to 200 ppb NO
2
is also measured, at 200°C.
2
Figure 9.27
(
) Schematic structure of an individual SWCNT electrical
device with about 5 Å Pd-coating. AFM image of an individual
SWCNT coated with Pd particles. The apparent heights
measured along the Pd-decorated SWCNTs range from 2.0 to
3.5 nm. (
a-Top
) Electrical conductance of the sensor as a
function of time upon air flow with 400 ppm H
b-Down
on and of.
This figure is reprinted and adapted with permission from
Wiley-VCH [232].
2
Figure 9.28
SEM image of the CNTs networks with Au-clusters of loading
5 nm (
e-Left
) and 10 nm (
f-Left
), after thermal annealing.
(
) Comparison of the mean sensitivity for three
chemiresistors based on unmodified CNTs, 5 nm and 10 nm
loaded-Au modified CNTs nets, versus temperature. (
Top-Right
Down-
Right
) Repeatability of the sensor response to eight pulses of
200 ppb NO
at 200°C. This figure is reprinted and adapted
with permission from Elsevier [248]. See also Color Insert.
2
