Marine monitoring by organic electrochemical transistors

Tse Nga Ng

doi:10.1117/12.3022536

30 September 2024 Marine monitoring by organic electrochemical transistors

Tse Nga Ng

Author Affiliations +

Proceedings Volume 13124, Organic and Hybrid Sensors and Bioelectronics XVII; 1312407 (2024) https://doi.org/10.1117/12.3022536
Event: Organic Photonics + Electronics, 2024, San Diego, California, United States

Abstract

Understanding the influence of environmental changes on marine life is important to ecological sustainability and aqua-culture. Existing sensors are limited by size and costs that preclude widespread non-intrusive monitoring. This work reports on various organic electrochemical transistors (OECTs) to track dissolved oxygen concentration and nutrient runoff in seawater, a highly challenging matrix owing to its high ionic strength and multitude of chemical interferents. We present the dual-gate configuration that extended the device stability window by preventing undesirable reactions at the OECT channel. Specifically, the sensor achieved a detection limit of 0.5 ppm dissolved oxygen concentration in seawater. We engineer a system to monitor the correlation of oyster movement with dissolved oxygen in its environment, and it offers a new design to realize compact, highly sensitive, economical in-situ sensors for harsh marine environments.

Conference Presentation

Citation Download Citation

Tse Nga Ng "Marine monitoring by organic electrochemical transistors", Proc. SPIE 13124, Organic and Hybrid Sensors and Bioelectronics XVII, 1312407 (30 September 2024); https://doi.org/10.1117/12.3022536

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