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Polymers for Biosensors and Detection

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: closed (25 July 2024) | Viewed by 1117

Special Issue Editor


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Guest Editor
Division of Chemical Industry, Yeungnam University College, Daegu 42415, Republic of Korea
Interests: lab on a chip; biosensor; microfluidic device; microwell array
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Special Issue Information

Dear Colleagues,

Polymers are useful materials for biosensors and detection. Designing and preparing different polymers for biosensors can meet the needs of different biosensing and detection applications, and can achieve higher sensitivity, lower detection limits, wider linear detection ranges, more efficient electron transfer, and higher stability.

This Special Issue of Polymers, entitled “Polymers for Biosensors and Detection”, is open to research articles and reviews on the preparation and application of polymers for biosensors and detection.

Prof. Dr. Jong Min Lee
Guest Editor

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Keywords

  • conducting polymers
  • molecularly imprinted polymers
  • micro-/nano-fabrication methods
  • biosensors
  • detection

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Published Papers (1 paper)

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Research

13 pages, 5276 KiB  
Article
Flexible Resistive Gas Sensor Based on Molybdenum Disulfide-Modified Polypyrrole for Trace NO2 Detection
by Kuo Zhao, Yunbo Shi, Mingrui Cui, Bolun Tang, Canda Zheng, Qinglong Chen and Yuhan Hu
Polymers 2024, 16(13), 1940; https://doi.org/10.3390/polym16131940 - 7 Jul 2024
Viewed by 784
Abstract
High sensitivity and selectivity and short response and recovery times are important for practical conductive polymer gas sensors. However, poor stability, poor selectivity, and long response times significantly limit the applicability of single-phase conducting polymers, such as polypyrrole (PPy). In this study, PPy/MoS [...] Read more.
High sensitivity and selectivity and short response and recovery times are important for practical conductive polymer gas sensors. However, poor stability, poor selectivity, and long response times significantly limit the applicability of single-phase conducting polymers, such as polypyrrole (PPy). In this study, PPy/MoS2 composite films were prepared via chemical polymerization and mechanical blending, and flexible thin-film resistive NO2 sensors consisting of copper heating, fluorene polyester insulating, and PPy/MoS2 sensing layers with a silver fork finger electrode were fabricated on a flexible polyimide substrate using a flexible electronic printer. The PPy/MoS2 composite films were characterized using X-ray diffraction, Fourier-transform infrared spectroscopy, and field-emission scanning electron microscopy. A home-built gas sensing test platform was built to determine the resistance changes in the composite thin-film sensor with temperature and gas concentration. The PPy/MoS2 sensor exhibited better sensitivity, selectivity, and stability than a pure PPy sensor. Its response to 50 ppm NO2 was 38% at 150 °C, i.e., 26% higher than that of the pure PPy sensor, and its selectivity and stability were also higher. The greater sensitivity was attributed to p–n heterojunction formation after MoS2 doping and more gas adsorption sites. Thus, PPy/MoS2 composite film sensors have good application prospects. Full article
(This article belongs to the Special Issue Polymers for Biosensors and Detection)
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