[D-3] Advanced Technologies for Bio- and Chemical Sensing

[D-3-02] Spatiotemporal Thermal Management of Homogeneous Oxide Sensor Array for Discrimination of Biomarkers in Mixed Molecules

〇Shintaro Nagata¹, Tsunaki Takahashi^1,2, Haruka Honda¹, Motoki Date¹, Yohsuke Shiiki³, Wataru Tanaka¹, Takuro Hosomi^1,2, Kazuki Nagashima^1,2, Hiroki Ishikuro³, Takeshi Yanagida^1,4 (1. Department of Applied Chemistry, Graduate School of Eng., The Univ. of Tokyo (Japan), 2. JST, PRESTO (Japan), 3. Department of Electronics and Electrical Eng., Keio Univ. (Japan), 4. Inst. for Materials Chemistry and Eng., Kyushu Univ. (Japan))

Presentation style: On-site (in-person)

https://doi.org/10.7567/SSDM.2022.D-3-02

We propose a chemical sensor system for discrimination of trace-level biomarkers in mixed molecules based on spatiotemporal thermal management of homogeneous oxide sensor array. Self-Joule-heating modulates chemical reactivity of individual SnO2 channels, enabling a virtual heterogeneous chemical sensor array operation. Mixed molecules were separately transported to the sensor array via time-series desorption temperature control of silica adsorbents, which densify trace-level molecules in a sample gas. Furthermore, we demonstrate the discrimination of model samples which mimic urine of tumor patients using the proposed sensor system.