M Nazari
Materials and Energy Research Center (MERC), Iran
Title: An electronic nose for detection of n-Hexane based on QCM gas sensor array
Biography
Biography: M Nazari
Abstract
Lung cancer is one the deadliest diseases in the world. Quartz crystal microbalance (QCM) is a novel mass sensitive sensor used a piezoelectric disc coated with a special material to detect targeted analytes. Various nano films have been coated with different techniques on its disk to increase sensitivity due of higher surface area available in nano-structural materials to identify lung cancer and get some elementary experimental results. QCM sensors are used to detect different VOCs which most of these VOCs are in the breath of lung cancer patients. N-Hexane is one of them that this present study investigated this gas. Polymer film technology is applied to improve the sensitivity of the QCM sensors. Herein, 7 polymers, PVP, PS, PA PVC, PU, PMMA, PC, were coated on the QCM electrode with electrospinning method. The sensor responses were linear and reproducible in the studied concentration ranges between 20ppm to 40 ppm. Electrospun nanofibers showed a superior frequency shift. The studied coatings have the capability to be used as simple and cost-effective layer for effective monitoring of n-Hexane vapor concentration in gaseous environments. In addition, based on PCA analysis for electrospun layers, it was shown that good separation can be achieved by using 5 polymer layers.