(480b) A Multimodal Electronic Nose Based on High-Density Flexible Sensor Array
AIChE Annual Meeting
2020
2020 Virtual AIChE Annual Meeting
Liaison Functions
KIChE-US Chapter Open Forum (Invited Talks)
Wednesday, November 18, 2020 - 8:15am to 8:30am
Each flexible sensor array contains 118 individually addressable sensing elements. For each sensor element, source-drain electrodes were connected by a semiconducting sensing layer comprising single-walled carbon nanotubes (SWNTs) functionalized with various photoactive macromolecules as secondary sensing materials. Secondary sensing materials used include chemical derivatives of pyrenes, porphyrins, and phthalocyanines, which have a large variety of side-groups, and metal centers. Therefore, each sensor array can be fabricated to have up to 118 unique sensing elements by functionalization with different macromolecules. Additionally, by integrating a large variety of secondary sensing materials into each sensing element of the 118-sensor array, we take advantage of the different chemical and electrical characteristics of each macromolecules which allow for different affinities to specific VOC species to enhance overall selectivity of the e-nose system. We demonstrated the functionality of the multimodal e-nose system to distinguish and quantify various volatile organic compounds (VOCs).