[20a-E312-1~10] 6.2 Carbon-based thin films

△ [20a-E312-8] pH Sensing with Vessel Gate utilizing Diamond Electrolyte Solution Gate FET

〇(B)Shuto Kawaguchi¹, Yutaro Iyama¹, Yu.Hao Chang¹, Kaito Tadenuma¹, Yukihiro Shintani¹, Hiroshi Kawarada^1,2 (1.Waseda Univ., 2.Zaiken)

Keywords:diamond, FET, pH sensor

Diamond is rich in surface modification, and its wide potential window makes it suitable for biosensors.In addition, glass electrodes are at risk of damage in pH measurement, so there is a need for an all-solid-state pH sensor to replace glass electrodes.This time, using both SGFET and a stainless steel container with pH sensitivity, it was found that the pH sensitivity of Vessel Gate was comparable to the Nernst response.