Fig. 1. Schematic image of gas sensor.气体传感器的结构示意图

Fig. 2. (a) Photograph of Sb doped ZnO microwire arrays; (b) SEM image of the single Sb doped ZnO microwire.(a) Sb掺杂ZnO微米线阵列实物照片; (b)单根Sb掺杂ZnO微米线的SEM图

Fig. 3. EDS for the single Sb doped ZnO microwire.单根Sb掺杂ZnO微米线的EDS

Fig. 4. The I-V characteristic curves of the single ZnO micronwire for air, acetone (200 ppm) and ethanol (200 ppm) at room temperature. 室温下单根Sb掺杂ZnO微米线分别在空气和浓度为200 ppm丙酮及乙醇气体中的I-V特性曲线

Fig. 5. Response and recovery curves of the gas sensor to different concentrations of acetone (a) and (b) ethanol at room temperature; (c), (d) the response of the gas sensor to different concentrations of acetone and ethanol at room temperature.室温条件下传感器在不同浓度丙酮和乙醇气体中的响应和恢复曲线　(a)丙酮; (b)乙醇; (c), (d)室温下传感器对不同浓度丙酮及乙醇气体的响应度曲线

Fig. 6. Response and recovery curves of gas sensor to 200 ppm acetone (a) and ethanol (b) at room temperature.室温下气体传感器对200 ppm被测气体的响应恢复曲线　(a)丙酮; (b)乙醇

Fig. 7. Response and recovery curves of two gas sensors to 200 ppm acetone and ethanol gases at room temperature: (a), (b) Non-balance electric bridge type; (c), (d) conventional conductance type.两种气敏传感器室温下对200 ppm丙酮和乙醇气体的响应和恢复曲线　(a), (b)非平衡电桥式; (c), (d)传统电导式