Study of smell-seeing sensor array based on metalloporphyrin and its image analysis

A simple optical chemical sensing method is presented to solve the problem of limited detecting range and sensing to environment vapor of tradition electronic nose systems. The method utilizes the color change induced in an array of metalloporphyrin dyes upon ligand binding when metalloporphyrin exposed to organic vapors. A sensitive film of chemical sensor is developed and the smell-seeing sensor array system is designed. To obtain unique color fingerprints by responding with different organisms, the system can recognize several organic vapors with advantages of high detecting precision and immunity to environment vapor. Using the sensitive film to response with hexylamine, acetonitrile and tetrahydrofuran separately, the experiment result shows that the smell-seeing sensor array can recognize these three organisms properly.