Hyo-Kyung Kang Jun-Ho Byeon Hyun-Jun Hwang Yoon Hee Jang Jin-Yeol Kim 2024-01-12T06:34:43Z 2024-01-12T06:34:43Z 2023-08-23 2023-08 https://pubs.kist.re.kr/handle/201004/79858 A nanocomposite rod-shaped structure with a single-walled carbon nanotube (SWCNT) embedded in polypyrrole (PPy) doped with nonafluorobutanesulfonic acid (C4F), SWCNT/C4F-PPy, was synthesized using emulsion polymerization. The hybrid ink was then directly coated on a polyimide film interdigitated with the Cu/Ni/Au electrodes via a screen-printing technique to create a flexible film sensor. The sensor film showed a response of 1.72% at 25 °C/atmospheric pressure when acetone gas of 5 ppm was injected, which corresponds to almost 95% compared to the Si wafer-based array interdigitated with the Au electrode. Additionally, C4F was used as a hydrophobic dopant of PPy to improve the stability of humidity and to produce a highly sensitive film-type gas sensor that provides stable detection even in humid conditions. English MDPI Open Access Publishing Flexible Sensor Film Based on Rod-Shaped SWCNT-Polypyrrole Nanocomposite for Acetone Gas Detection Article 10.3390/polym15163416 1 Polymers, v.15, no.16 Polymers 15 16 Y scie scopus 001116772200001 Polymer Science Polymer Science Article THIN-FILM PERFORMANCE DIAGNOSIS flexible gas sensor SWCNT-PPy composite acetone gas sensor polyimide substrate room temperature