Polyaniline Anchored MWCNTs on Fabric for High Performance Wearable Ammonia Sensor

ACS Sensors
Debasis Maity, Ramasamy Thangavelu Rajendra Kumar

Abstract

Polyaniline (PANI) functionalized multiwall carbon nanotubes (MWCNTs) were prepared via in situ chemical polymerization process of aniline, in which MWCNTs were spray coated on the fabric for wearable ammonia sensor. Structural, morphological, thermal properties and wettability were analyzed by scanning electron microscope, X-ray diffraction, Raman analysis and contact angle measurement. No substantial change in base resistance of MWCNTs/PANI fabric sensor was observed for a wide range of bending (from 90° to 270°) shows excellent wearability. The sensors were exposed to 20-100 ppm ammonia vapor at room temperature. It was observed that the sensing response of PANI coated MWCNTs was enhanced than MWCNTs and PANI. The sensor has the capability to detect ammonia with high sensitivity (92% for100 ppm), excellent selectivity quick response (9 s), and recovery time (30 s). The lower detection limit (LOD) for the MWCNTs/PANI fabric sensor was found to be 200 ppb. The influence of humidity on sensing parameters was studied. Sensing response and resistance of sensor have shown excellent stability after one month. We observed that PANI have a dual role in enhancing flexibility as well as improve the sensor performance toward ammonia. Th...Continue Reading

References

May 24, 2015·Analytica Chimica Acta·Kei TodaShinya Hayami
Oct 22, 2015·ACS Applied Materials & Interfaces·Krishnamoorthy RajavelRamasamy Thangavelu Rajendra Kumar

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Citations

Apr 11, 2020·Advanced Science·Andreas T GüntnerSotiris E Pratsinis
Apr 4, 2021·Polymers·Isacco GualandiBeatrice Fraboni
May 1, 2021·Sensors·Agnieszka BrochockaMarta Sieradzka
Aug 11, 2021·Sensors·Fabio Seiti HadanoWilson José da Silva
Nov 28, 2018·Analytical Chemistry·Melinda HerseyParastoo Hashemi
Dec 7, 2021·ACS Applied Materials & Interfaces·Jin ZhouKrisztian Kordas
Jan 18, 2022·Advanced Science·Yiyuan ZhangJun Yang

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