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Item Metadata only Development of electronic nose system based on optically-active organic thin film sensors and molecular design(Mahidol University. Mahidol University Library and Knowledge Center, 2023) Sumana Kladsomboon; Teerakiat Kerdcharoen; Adisorn Tuantranont; Lieberzeit, Peterabsorption spectrum. The second type employed light-emitting diodes (LEDs) as the light source and CMOS photodetector was as transducer. The latter e-nose system was invented as a portable device. Finally, the principal component analysis (PCA) was performed