Dataset Information

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

ABSTRACT: Real-time and accurate biomarker detection is highly desired in point-of-care diagnosis, food freshness monitoring, and hazardous leakage warning. However, achieving such an objective with existing technologies is still challenging. Herein, we demonstrate a wireless inductor-capacitor (LC) chemical sensor based on platinum-doped partially deprotonated-polypyrrole (Pt-PPy⁺ and PPy⁰) for real-time and accurate ammonia (NH₃) detection. With the chemically wide-range tunability of PPy in conductivity to modulate the impedance, the LC sensor exhibits an up-to-180% improvement in return loss (S11). The Pt-PPy⁺ and PPy⁰ shows the p-type semiconductor nature with greatly-manifested adsorption-charge transfer dynamics toward NH₃, leading to an unprecedented NH₃ sensing range. The S11 and frequency of the Pt-PPy⁺ and PPy⁰-based sensor exhibit discriminative response behaviors to humidity and NH₃, enabling the without-external-calibration compensation and accurate NH₃ detection. A portable system combining the proposed wireless chemical sensor and a handheld instrument is validated, which aids in rationalizing strategies for individuals toward various scenarios.

SUBMITTER: Lv W

PROVIDER: S-EPMC11322651 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature

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

Lv Wen W Yang Jianhua J Xu Qingda Q Mehrez Jaafar Abdul-Aziz JA Shi Jia J Quan Wenjing W Luo Hanyu H Zeng Min M Hu Nantao N Wang Tao T Wei Hao H Yang Zhi Z

Nature communications 20240813 1

Real-time and accurate biomarker detection is highly desired in point-of-care diagnosis, food freshness monitoring, and hazardous leakage warning. However, achieving such an objective with existing technologies is still challenging. Herein, we demonstrate a wireless inductor-capacitor (LC) chemical sensor based on platinum-doped partially deprotonated-polypyrrole (Pt-PPy+ and PPy0) for real-time and accurate ammonia (NH3) detection. With the chemically wide-range ...[more]

PMID: 39138176

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Project description:In recent years, LC resonant sensors have gained widespread attention for their extensive applications in industries such as pharmaceutical storage and food transportation. A wireless passive sensor with a good sensing performance is proposed based on a GO/CNT-OH/Nafion nanocomposite. The sensor was fabricated via inkjet printing technology, and the surface morphology of the GO/CNT-OH/Nafion nanocomposite was characterized by SEM measurement. It is found that the MWCNTs support the GO layer and the hydrophobic chains of Nafion interact with the hydrophobic layer of GO, resulting in a larger cavity and hydrophilic surface of the entire material. This structure well reflects the fact that the mixing of MWCNTs and Nafion provides the entire material with a stronger water absorption. The experimental study shows that the proposed humidity sensor has a frequency variation of 103 kHz/%RH at low humidity (30-60% RH) and a sensitivity of 931 kHz/%RH at high humidity (60-95% RH), while the sensitivity value from 30-95% RH is 547 kHz/% RH. The response time and recovery time are 110 s and 115 s, respectively. In addition, the tests showed that the GO/CNT-OH/Nafion nanocomposite applied to the humidity sensor had a maximum humidity hysteresis of about 3% RH at 30-95% RH, the resonant frequency remained basically unchanged after 50 h of testing, and the whole sensor possessed a good stability. After conducting several repeated experiments, it was found that the resonant frequency error of the whole sensor was low and did not affect the overall sensing test, which proved the reproducible preparation of the sensor. Finally, the humidity-sensing mechanism of the proposed sensor was analyzed in this paper, and it was found that GO enhanced the hygroscopic properties of GO/CNT-OH/Nafion nanocomposite when it was supported by MWCNT-OH and included uniformly dispersed Nafion. Therefore, our proposed humidity sensor is suitable for humidity detection above 30% RH in both sealed and open environments.

Dataset Information

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

Publications

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

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