Fig. 3: Performance evaluation of the AgI-PSS-rGO sensor module.
a Dynamic I2 gas sensing at room temperature: i Response-recovery profiles for AgI-PSS-rGO, PSS-rGO, and rGO sensor modules at 50 ppm I2 gas. ii Consecutive 20-cycle response-recovery profile of AgI-PSS-rGO upon exposure to and removal from 75 ppm I2 gas. iii Consecutive response-recovery profile of AgI-PSS-rGO with varying I2 concentrations ranging from 75 ppm to 250 ppb. iv Corresponding plot of response values versus I2 concentrations. b Static I2 gas sensing at room temperature: i Response-recovery profile of AgI-PSS-rGO at a 200 ppm I2 concentration. ii Consecutive 20-cycle response-recovery profile of AgI-PSS-rGO upon exposure to and removal from 200 ppm I2 gas. iii Consecutive response-recovery profile of AgI-PSS-rGO with varying I2 concentrations ranging from 200 ppm to 25 ppb. iv Corresponding plot of response values versus I2 concentrations. c A ten-week aging test with biweekly inspections of AgI-PSS-rGO at a 200 ppm I2 concentration. d Responses of AgI-PSS-rGO to I2 and other interfering gases including Cl2, NO2, SO2, H2S, ethanol, acetone, CH3I, H2 and N2. For ease of comparison, the sensing response is expressed as to Response (%) = (Ra − Rg)/Ra × 100 for oxidizing gases, and Response (%) = (Rg − Ra)/Rg × 100 for reducing gases. e Comparison of AgI-PSS-rGO with 16 previously reported I2 gas sensors regarding limit of detection (LoD), operating temperature (Temp), response time (tres), and recovery time (trec) (see Supplementary Table 1 for specifics). The error bars in a–c represent the standard deviations from five measurement cycles. Source data are provided as a Source Data file.
