Abstract
This report deals with the synthesis of poly(3,4-ethylenedioxythiophene):poly(4styrenesulfonate)/graphene oxide (PEDOT:PSS/GO) composites by solution processing method and exploration of the same for chemiresistive-type SO2 gas sensing. The PEDOT:PSS polymer is used as a conducting layer due to high stability in air and GO due to the high surface-to-volume ratio. The PEDOT:PSS/GO was characterized by using an X-ray diffractometer, atomic force microscopy (AFM), and Raman spectroscopy. The sensor channel was fabricated by drop-casting PEDOT:PSS/GO on the sub-mm gap of copper a electrode on plastic substrate, which forms two-electrode devices as a sensor. The PEDOT:PSS/GO sensor platform manifests highly selective, sensitive, rapid, and reversible responses for the detection of 0.5–40 ppm SO2 gas. Moreover, it exhibits fast response and recovery time (81 s and 92 s), with excellent selectivity and stability at room temperature.
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Acknowledgements
The authors extend their sincere thanks to DST—SERB, New Delhi (Project No. EEQ/2017/000645), Rashtriya Uchchatar Shiksha Abhiyan (RUSA), Government of Maharashtra, UGC—DAE CSR (RRCAT), Indore (Project No. CSR-IC-BL66/CRS- 183/2016-17/847), Inter University Accelerator Center (IUAC), New Delhi, India (UFR no. 62320), UGC-SAP Programme (F.530/16/DRS-I/2016 (SAP-II) Dt.16-04-2016), and DST-FIST (Project No. SR/FST/PSI-210/2016(C) dtd. 16/12/2016) for providing financial support.
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Sayyad, P.W., Khan, S.S., Ingle, N.N. et al. Chemiresistive SO2 sensor: graphene oxide (GO) anchored poly(3,4-ethylenedioxythiophene):poly(4styrenesulfonate) (PEDOT:PSS). Appl. Phys. A 126, 857 (2020). https://doi.org/10.1007/s00339-020-04053-9
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DOI: https://doi.org/10.1007/s00339-020-04053-9