The Sensitivity to Moisture Peculiarities of Nanoscale …
327
Fig. 2 Relaxation of the current in the SnO 2 film with periodic inlet of water vapor or dry air into
the chamber (V = 250 V)
approximately to the initial value for the same period of time, that is, the change in
conductivity is reversible.
Measurements of current relaxation were carried out in the range of applied voltages from 150 to 320 V. The magnitude of the sensitivity S at various voltages was
calculated by the formula:
S =
I 1 − I 0
I 0
(1)
where I 1 is the current in the presence of water vapor, I 0 is the current in the
atmosphere of dry air. The results of the calculations are shown in Table 1 and
Fig. 3.
Table 1 The sensitivity values of the studied SnO 2 films at various values of the applied voltage
V, V.
150
200
250
300
350
S, rel.un.
0,62
0,64
0,71
0,76
0,73
Fig. 3 The applied voltage
dependence of the SnO 2 film
sensitivity in the presence of
water vapor
327
Fig. 2 Relaxation of the current in the SnO 2 film with periodic inlet of water vapor or dry air into
the chamber (V = 250 V)
approximately to the initial value for the same period of time, that is, the change in
conductivity is reversible.
Measurements of current relaxation were carried out in the range of applied voltages from 150 to 320 V. The magnitude of the sensitivity S at various voltages was
calculated by the formula:
S =
I 1 − I 0
I 0
(1)
where I 1 is the current in the presence of water vapor, I 0 is the current in the
atmosphere of dry air. The results of the calculations are shown in Table 1 and
Fig. 3.
Table 1 The sensitivity values of the studied SnO 2 films at various values of the applied voltage
V, V.
150
200
250
300
350
S, rel.un.
0,62
0,64
0,71
0,76
0,73
Fig. 3 The applied voltage
dependence of the SnO 2 film
sensitivity in the presence of
water vapor