Presentation Information
[7a-N206-8]Discrimination of citrus flavor based on gradual adsorption of monoterpene reaction byproducts on nanowire array QCM
〇Kiori Sekine1, Takuro Hosomi1, Haruka Honda1, Jiangyang Liu1, Wataru Tanaka1, Tsunaki Takahashi1, Takeshi Yanagida1,2 (1.The Univ. of Tokyo, 2.IMCE, Kyushu Univ.)
Keywords:
nanowire,molecular discrimination
We successfully discriminated citrus flavor molecules by gas sensing with ZnO single-crystal nanowires, which was enabled by reflecting differences in the hydrocarbon skeletons of the molecules in their diffusion rates within the nanowires and reactivity at the surfaces of nanowires. We found that the citrus flavor molecules exhibit characteristic gradual adsorption. GC-MS chromatograms and FT-IR measurements revealed that characteristic gradual adsorption is caused by either (1) slow molecular diffusion, (2) adsorption of formic acid generated by the oxidation reaction of the terminal double bond at the surfaces of nanowires, or (3) adsorption of H2O molecules that are reaction byproducts of the oxidative dehydrogenation reaction at the surfaces of nanowires. This research achieved flavor discrimination by molecular recognition sensors, which had been considered extremely difficult due to the difficulty of discriminating the hydrocarbon skeletons of molecules.