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纳米结构 P3HT 作为一种有前途的传感元件，可实时、动态检测气态丙酮。

Nanostructured P3HT as a Promising SensingElement for Real-Time, Dynamic Detection ofGaseous Acetone.

机构信息

Global Connectivity & Technology-Robotics and Artificial Intelligence, Corso Lino Zanussi 24,33080 Porcia (PN), Italy.

Department of Engineering and Architecture, University of Trieste, Via Valerio 10, 34127 Trieste, Italy.

出版信息

Sensors (Basel). 2019 Mar 14;19(6):1296. doi: 10.3390/s19061296.

DOI:10.3390/s19061296
PMID:30875845
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6471540/
Abstract

The dynamic response of gas sensors based on poly(3-hexylthiophene) (P3HT) nanofibers(NFs) to gaseous acetone was assessed using a setup based on flow-injection analysis, aimed atemulating actual breath exhalation. The setup was validated by using a commercially available sensor.The P3HT NFs sensors tested in dynamic flow conditions showed satisfactory reproducibility down toabout 3.5 ppm acetone concentration, a linear response over a clinically relevant concentration range(3.5-35 ppm), excellent baseline recovery and reversibility upon repeated exposures to the analyte,short pulse rise and fall times (less than 1 s and about 2 s, respectively) and low power consumption(few nW), with no relevant response to water. Comparable responses' decay times under eithernitrogen or dry air suggest that the mechanisms at work is mainly attributable to specific analytesemiconductingpolymer interactions. These results open the way to the use of P3HT NFs-basedsensing elements for the realization of portable, real-time electronic noses for on-the-fly exhaledbreath analysis.

摘要

基于聚(3-己基噻吩)(P3HT)纳米纤维(NFs)的气体传感器对气态丙酮的动态响应采用基于流动注射分析的装置进行了评估，旨在模拟实际的呼气。该装置使用市售传感器进行了验证。在动态流动条件下测试的 P3HT NF 传感器在低至约 3.5 ppm 丙酮浓度下表现出令人满意的重现性，在临床相关浓度范围内(3.5-35 ppm)呈线性响应，在反复暴露于分析物时具有出色的基线恢复和可逆性，短的脉冲上升和下降时间(分别小于 1 s 和约 2 s)和低功耗(几纳瓦)，对水没有明显响应。在氮气或干燥空气中的类似响应衰减时间表明，起作用的机制主要归因于特定分析物-半导体聚合物相互作用。这些结果为使用基于 P3HT NF 的传感元件实现用于实时分析呼出气流的便携式实时电子鼻铺平了道路。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/225f/6471540/96808d3aeaab/sensors-19-01296-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/225f/6471540/0afec7e731b0/sensors-19-01296-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/225f/6471540/308e30cdf3d8/sensors-19-01296-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/225f/6471540/a7c17be8e371/sensors-19-01296-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/225f/6471540/958a5b7d3b85/sensors-19-01296-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/225f/6471540/d982ed7e348b/sensors-19-01296-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/225f/6471540/0610dcdbd279/sensors-19-01296-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/225f/6471540/96808d3aeaab/sensors-19-01296-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/225f/6471540/0afec7e731b0/sensors-19-01296-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/225f/6471540/308e30cdf3d8/sensors-19-01296-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/225f/6471540/a7c17be8e371/sensors-19-01296-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/225f/6471540/958a5b7d3b85/sensors-19-01296-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/225f/6471540/d982ed7e348b/sensors-19-01296-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/225f/6471540/0610dcdbd279/sensors-19-01296-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/225f/6471540/96808d3aeaab/sensors-19-01296-g007.jpg

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