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Drug abuse directly endangers human health and social security, hence its sensitive and rapid detection is vitally important. In recent years, organic film-based fluorescent sensing technology has attracted more and more attention in the detection of drugs and explosives due to its advantages of simple operation and rapid detection. For film-based fluorescent sensors, in addition to sensitive materials, the surface morphology of the film is also an important factor affecting the performance. In previous studies, the regulation of surface morphology mainly depends on concentration changes or complex templates. Here, a novel fluorescent polymer probe was designed and synthesized, and a simple and efficient ultraviolet (UV)–ozone substrate treatment method is used to adjust their surface morphology. The results show that film has an excellent fluorescence enhancement effect upon exposure to methylphenethylamine (MPEA, a simulant of methamphetamine) vapor. The sensing effect of the film is significantly improved after UV–ozone substrate treatment, and the limit of detection was decreased by 10.4 times from 2.59 to 0.25 ppm. Further experiments show that the sensing performance of other fluorescent probe can also be improved by the UV–ozone substrate treatment. This convenient and general method may become a very effective approach to improve the performance of film-based fluorescent sensors.


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Micro-interfaces modulation by UV–ozone substrate treatment for MPEA vapor fluorescence detection

Show Author's information Bin Li1,2,§Keke Li1,2,§Wei Xu1,3,§Mingzhu Yan1,3Jianhao Zhao1,2Wukun Zhang1Mingshuai Yuan1,3Yanyan Fu1,3( )Qingguo He1,3( )Jiangong Cheng1,3( )
State Key Lab of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

§ Bin Li, Keke Li, and Wei Xu contributed equally to this work.

Abstract

Drug abuse directly endangers human health and social security, hence its sensitive and rapid detection is vitally important. In recent years, organic film-based fluorescent sensing technology has attracted more and more attention in the detection of drugs and explosives due to its advantages of simple operation and rapid detection. For film-based fluorescent sensors, in addition to sensitive materials, the surface morphology of the film is also an important factor affecting the performance. In previous studies, the regulation of surface morphology mainly depends on concentration changes or complex templates. Here, a novel fluorescent polymer probe was designed and synthesized, and a simple and efficient ultraviolet (UV)–ozone substrate treatment method is used to adjust their surface morphology. The results show that film has an excellent fluorescence enhancement effect upon exposure to methylphenethylamine (MPEA, a simulant of methamphetamine) vapor. The sensing effect of the film is significantly improved after UV–ozone substrate treatment, and the limit of detection was decreased by 10.4 times from 2.59 to 0.25 ppm. Further experiments show that the sensing performance of other fluorescent probe can also be improved by the UV–ozone substrate treatment. This convenient and general method may become a very effective approach to improve the performance of film-based fluorescent sensors.

Keywords: fluorescence sensing, ultraviolet (UV)–ozone, substrate treatment, organic sensing materials, film-based gas sensors

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Publication history
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Acknowledgements

Publication history

Received: 21 December 2021
Revised: 17 January 2022
Accepted: 07 February 2022
Published: 15 March 2022
Issue date: March 2023

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

This project was financially supported by the National Natural Science Foundation of China (Nos. 62022085, 61901456, 61831021, 61731016, and 61771460), the National Key R&D Program of China (No. 2018AAA0103100), and the Science and Technology Commission of Shanghai Municipality (Nos. 19YF1455700 and 19142203500). We would also like to express our thanks to Prof. Wei Huang from University of Electronic Science and Technology of China for his helpful discussions.

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