[9a-S421-1~12] 12.7 Biomedical Engineering and Biochips

[9a-S421-10] Development of a thin and lightweight Organic CO₂ sensor using PEDOT: PSS

〇Kazuhiko Tutiya¹, Ayako Nomura¹, Junichi Tokairin¹, Yoshihiro Okuyama¹, Kuniaki Nagamine^1,2, Hiroyuki Furusawa³, Shizuo Tokito^1,2 (1.ROEL, Yamagata Univ., 2.Grad. Sch. of Org. Mat. Sci., Yamagata Univ, 3.Grad. Sch. of Sci. and Eng., Yamagata Univ)

Keywords:PEDOT:PSS, carbon dioxide, sensitive film

To develop a thin and light CO₂sensor that can be used at low cost in the field environment, we fabricated a sensor chip with two electrodes equipped a CO₂ sensitive film composed of PEDOT:PSS and a polymer/Cu-chelating reagent that was laminated on the electrodes on a plastic substrate by coating technique, and then response performance to CO₂was evaluated. As a result, the concentration of CO₂ could be monitored by the change in the resistance value between the two electrodes accordingly. The result suggests that Cu²⁺was generated in the sensitive film by adsorption of CO₂ in the reaction process and then layer separation of PEDOT and PSS was promoted, resulting in the resistance value changes.