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A sensor based on quartz crystal microbalance (QCM) coated by TEOS film has been developed for the detection of volatile organic compounds (VOCs), such as methanol, ethanol, acetone and chloroform vapors. Plasma polymerized tetraethoxysilane (ppTEOS) thin films deposited on quartz crystal microbalance (QCM) electrode were used as sensitive layer. The measured isotherms on modified QCM electrode showed...