Biomedical Engineering Reference
In-Depth Information
POAS-coated CNTs
POAS-coated CNTs exposed to HCl 100 ppm
1.0
×
10
−
2
5.0
×
10
−
3
0.0
CNTs
CNTsexposed to HCl 100 ppm
16
12
9
4
0
−
4
−
5.0
×
10
−
3
−
9
−
12
−
16
−
1.0
×
10
−
2
0.0
0.2
0.4
0.6
−
0.6
−
0.4
−
0.2
Voltage (v)
−
0.6
−
0.4
−
0.2
0.0
0.2
0.4
0.6
(a)
Voltage (V)
POAS-coated CNTs exposed to HCl 100 ppm
POAS exposed to HCI 100 ppm
1.0
0.8
0.6
0.4
0.2
0
10
20
30
40
50
(b)
Time (S)
CNTs exposed to HCl
40
POAS-coated CNTs exposed to HCl
35
30
5
100
150
200
250
300
350
400
(c)
HCl (ppm)
FIGURE 9.4
(a)
I
-
V
curves at room temperature of POAS-coated devices to HCl vapor. The inset shows
I
-
V
curves of the
CNTs device at room temperature to HCl 100 ppm. (b) The time-dependent change of the normalized resistance
(
R
t0
is the initial resistance of the sample) of POAS-coated device and CNT film at room temperature to HCl 100
ppm. (c) Sensitivity vs. HCl concentrations of POAS-coated device and CNT .lm at room temperature.
