Research Article
New Design of ZnO Nanorod- and Nanowire-Based NO2 Room-Temperature Sensors Prepared by Hydrothermal Method
Table 1
Response time/recovery time of the ZnO NR and NW sensors to various concentrations of NO2 at different applied voltages.
| Applied voltage | Nanorods | Nanowires | 1 ppm | 5 ppm | 10 ppm | 1 ppm | 2.5 ppm | 5 ppm | 10 ppm |
| 1 V | 270/716 | 466/827 | 293/553 | 181/1153 | 279/834 | 389/1238 | 441/535 | 2 V | 547/498 | 608/800 | 277/786 | 131/202 | 141/302 | 108/216 | 43/136 | 4 V | 11/187 | 843/1580 | 762/1597 | 321/- | 305/734 | 248/712 | 298/600 | 8 V | 547/416 | 708/917 | 668/1008 | 218/572 | 366/491 | 382/745 | 205/498 |
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Unit: seconds.
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