Sensors & Transducers (Apr 2008)
Odor Sensing with Indium Tin Oxide Thin Films on Quartz Crystal Microbalance
Abstract
Odor sensors were fabricated by depositing nanocrystalline Indium Tin Oxide thin films on an AT-cut quartz crystals. These sensors were tested with odors from different groups of foods, including fruits, cheeses, and wines. The change in frequency characteristics and surface resistance as a function of time was measured for each. Principal Component Analysis showed intuitive groupings of the odors tested.