Fig. 2: Operando characterizations for the iodine sensing process. | Nature Communications

Fig. 2: Operando characterizations for the iodine sensing process.

From: Highly sensitive, responsive, and selective iodine gas sensor fabricated using AgI-functionalized graphene

Fig. 2

a Schematic diagram of the operando Raman spectroscopy and XRD setup. b Diagram illustrating the various stages of the I2 gas sensing process on the Ag-PSS-rGO composite. The numbers ①−⑥ indicate the points at which operando XRD and Raman data were collected. c Operando XRD profiles and d Operando Raman spectra, collected during the alternating exposure to I2 vapor and air, corresponding to the stages marked in b. The total flow rate is 200 standard cubic centimeters per minute (sccm), and the concentration of I2 vapor is 75 ppm. The light-colored, noisy curves represent the raw data, while the deep-colored, smooth curves correspond to the refined data obtained after fitting. Source data are provided as a Source Data file.

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