Highly Sensitive Dense Conductive Polymer Composite Based on PLA for Disease Diagnosis
Volume Title: 1
A thin conductive polymer composite (CPC) film was prepared by the spin coating method on the interdigitated gold electrode (IDGE). The prepared CPC consists of polylactic acid (PLA) as an insulating polymer matrix and multiwalled carbon nanotube (MWCNTs) as a conductive filler. The prepared conductive thin film was used as the sensitive layer to detect a series of volatile organic compounds (VOCs) such as methanol, ethanol, toluene, and water as lung cancer biomarkers. PLA/CNT sensitive layer showed the fast and repeatable responses toward the mentioned analytes. Also, the experimental results exhibited the following trend of sensitivity: REthanol > Rmethanol > RToluene > RWater. This trend was analyzed based on the Flory-Huggins interaction parameter. The results indicated that the thin CPC sensitive layer has a great potential to use as a gas detector to detect lung cancer biomarkers.