Surface acoustic wave vapor sensor using ultrathin multilayer films

摘要

A surface acoustic wave (SAW) sensor incorporating an ultrathin selective film is presented. The ultrathin films were made by both self-assembled (SA) method and by Langmuir-Blodgett (LB) method. SAW delay lines coated with SA film and LB film has been used as vapor sensor. Rapid and totally reversible sensor responses were obtained by using the thin monolayer film.