[16a-WL1_301-1~11] 12.7 Biomedical Engineering and Biochips

10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)

[16a-WL1_301-5] Cation effect in solution on oxide In₂O₃ semiconductor biosensor

〇Yiran Bao¹, Disuke Hirose¹, Yuzuru Takamura¹ (1.Japan Advanced Institute of Science and Technology)

Keywords:

biosensor,oxide TFT

We develop biosensors based on oxide thin-film transistors (TFTs) featuring low fabrication cost, scalability, and stable operation in aqueous environments. Previously, we reported that increasing the K⁺ ion concentration in the contacting solution decreases the drain current, in contrast to the effect of H⁺ ons. In this study, a similar trend was observed in NaCl solutions, where the drain current decreased with increasing ion concentration. Additionally, the threshold voltage shifted positively at approximately 40 mV/decade with increasing NaCl concentration.