[21a-A102-1~7] 9.3 Nanoelectronics

[21a-A102-7] Fabrication of polycrystalline LaF₃ electrodes and comparison with single crystal electrode for high performance fluoride ion sensor

〇(M2)Kaito Kanda¹, Yamada Tetsuya¹, Yanagida Yasuko¹, Mayanagi Gen², Takahashi Masahiro² (1.Tokyo Tec. IIR, 2.Tohoku Univ. Division of Oral Ecology and Biochemistry)

Keywords:Fluoride ion sensor, Ion selective electrode, Lanthanum fluoride (LaF3)

Single crystal LaF₃, which is widely used as a fluorine ion sensor element, is expensive to manufacture and difficult to miniaturize. Small sensor electrodes using polycrystalline LaF₃ have been studied as an alternative to single crystal LaF₃, there are no reports of polycrystal having higher sensor performance than a single crystal. The reason why the sensor performance of a single crystal is better than that of polycrystalline LaF₃ has also not been clarified. This study investigates the differences between polycrystalline and single crystal LaF₃ to improve polycrystalline electrodes' performance.