Kang Hyo-Kyung, Byeon Jun-Ho, Hwang Hyun-Jun, Jang Yoon Hee, Kim Jin-Yeol
School of Advanced Materials Engineering, Kookmin University, Seoul 02707, Republic of Korea.
Advanced Photovoltaics Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea.
Polymers (Basel). 2023 Aug 16;15(16):3416. doi: 10.3390/polym15163416.
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.
通过乳液聚合合成了一种纳米复合棒状结构,即嵌入了掺杂九氟丁磺酸(C4F)的聚吡咯(PPy)中的单壁碳纳米管(SWCNT),SWCNT/C4F-PPy。然后,通过丝网印刷技术将混合墨水直接涂覆在与Cu/Ni/Au电极交叉指状排列的聚酰亚胺薄膜上,以制备柔性薄膜传感器。当注入5 ppm的丙酮气体时,该传感器薄膜在25℃/大气压下显示出1.72%的响应,与基于金电极交叉指状排列的硅晶片阵列相比,这几乎相当于95%。此外,C4F被用作PPy的疏水掺杂剂,以提高湿度稳定性,并制备出即使在潮湿条件下也能提供稳定检测的高灵敏度薄膜型气体传感器。