Engineering and Technology

Wide-range and high-accuracy wireless sensor with self-humidity compensation for real-time ammonia monitoring

W. Lv, J. Yang, et al.

This innovative research showcases a wireless LC chemical sensor that utilizes platinum-doped partially deprotonated-polypyrrole for precise ammonia detection, developed by Wen Lv, Jianhua Yang, Qingda Xu, Jaafar Abdul-Aziz Mehrez, Jia Shi, Wenjing Quan, Hanyu Luo, Min Zeng, Nantao Hu, Tao Wang, Hao Wei, and Zhi Yang. The sensor not only achieves real-time response but also distinguishes between humidity and ammonia, making it a crucial tool for various applications.

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Abstract

This paper demonstrates a wireless inductor-capacitor (LC) chemical sensor using platinum-doped partially deprotonated-polypyrrole (Pt-PPy+ and PPy0) for real-time and accurate ammonia (NH3) detection. The sensor's impedance is tuned by modulating PPy conductivity, improving return loss (S11). The Pt-PPy+ and PPy0 exhibit p-type semiconductor behavior with strong adsorption-charge transfer dynamics towards NH3, enabling a wide detection range. The sensor discriminates between humidity and NH3 responses (S11 and frequency), allowing self-humidity compensation and accurate NH3 detection. A portable system combining the sensor and a handheld instrument is validated for various applications.

Publisher

Nature Communications

Published On

Aug 13, 2024

Authors

Wen Lv, Jianhua Yang, Qingda Xu, Jaafar Abdul-Aziz Mehrez, Jia Shi, Wenjing Quan, Hanyu Luo, Min Zeng, Nantao Hu, Tao Wang, Hao Wei, Zhi Yang

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