Paper-based Chemiresistive Gas Sensor Using Molecularly Imprinted Sol-Gels for Volatile Organic Acids Detection

Volatile organic acids are important compounds related to specific diseases from human body odor. In this research, paper-based chemiresistive gas sensor was proposed based on inkjet printing technology using desktop inkjet printer. We formulated an alcoholic-based ketjen black ink to construct conductive layer. In addition, molecularly imprinted sol-gels ink was synthesized to realize specific selectivity. To obtain best sensor performance, the main two parameters, template concentration and crosslinker/monomer ratio, were optimized. This work demonstrated that the paper-based MISG gas sensor have a great potential for rapid, sensitive, and selective gas detection.