[18p-E102-1~13] 12.7 Biomedical Engineering and Biochips

△ [18p-E102-10] Proposal and evaluation of dissolved oxygen image sensor
using Iridium Oxide as sensing membrane

〇Ryosuke Iwatsuchi¹, Rena Ueda¹, Tomoko Horio¹, Yoshiko Noda¹, Daisuke Akai¹, Ken Hizawa¹, Hideo Doi¹, Yongjoon Choi¹, Kazuhiro Takahashi¹, Toshihiko Noda¹, Kazuaki Sawada¹ (1.Toyohashi Univ.)

Keywords:Dissolved Oxygen

In this study, we focused on Iridiumu oxide (IrO_x), which can be fibered into different stable states of trivalent and tetravalent, and fabricated a dissolved oxygen (DO) image sensor with an IrO_x film deposited on a potentiometric array sensor and evaluated its response characteristics to the DO. The fabricated DO sensor showed a sensitivity of 27 mV/log[O₂] ppm in response to the DO, demonstrating that the IrO_x thin film functions as a DO-sensitive film, and an imaging device that can measure DO in liquids as a two-dimensional distribution was successfully fabricated by depositing the IrO_x on the potentiometric array sensor.