Colorimetric Sensor Array based on Ink-jet Printing Method for Gas Detection System

摘要

Hazardous gas detection is one of the important issues in the industry dealing with the toxic chemicals. The colorimetric sensor array has been developed for detection of the Toxic Industrial Chemicals (TICs). This study describes a colorimetric sensor array by using printing method and Complementary Metal Oxide Semiconductor (CMOS) image sensor for highly sensitive gas detection system. The sensor array is produced by the piezo inkjet-printer in order to achieve array uniformity, cost efficiency and ability to adjust the array thickness. The initial colors of sensor array are changed by chemical gases within 10 seconds of exposure to Time Weighted Average (TWA) concentration. Detection of the color change was performed before and after a gas exposure. This printing method of sensor array demonstrates the potential for sensing application of sensitivity, rapidity and it is a simple method to use.