Visualization of Odor Source Localization Realized by SERS Gas Sensor

Surface-Enhanced Raman Scattering (SERS) technique is used to fabricate the gas sensor, which is developed for the visualization of the odor source localization. The 3 × 3 SERS sensor array is put on the odor source and then scanned by the home-made detection system to obtain the Raman spectra of the odor. The intensities of the characteristic peaks from the collected spectra are used to draw a heatmap graph. After the heatmap graph is processed by the noise reduction, the localization of the odor source can be clearly identified through the resulting graph.