Detection of volatile organic compounds using surface acoustic wave sensors with different polymer coatings

Optimization of SAW sensors with a structure ZnO–SiO2–Si to detect volatile organic compounds

“…8(a) and (b) show a poor response for different octane concentrations and in addition the sensor does not differentiate concentrations for both ZnO films. For octane detection other polymers as polyetherurethane (PEUT), polydimethylsiloxane (PDMS) and polybutadiene (PBD) could be used [10].…”

Sensing of volatile organic compounds in indoor atmosphere and confined areas of industrial environments

“…Furthermore, optical fibre sensors can be used for fast and safe detection in environments with high inflammability risk and inaccessible areas, such as in high temperature or radiation environments. In recent years, many optical fibre sensors for organic vapours detection have been reported based on optical fibre technology (Zimmermann et al, 1997;Kondratowicz et al, 2001;Abdelmalek et al,1999;Abdelghani et al, 1997a;Abdelghani et al, 2001;Abdelghani et al, 1997b;Horrillo et al, 2004;Bariáin et al, 2001;Bariáin et al, 2003;Bariáin et al, 2005;Elosúa et al, 2006). Optical fibre sensors based on polymer-cladding are a very promising tool concerning VOCs detection, due to its simplicity and sensitivity.…”

Electronic nose based on the polymer coated SAW sensors array for the warfare agent simulants classification

“…The mass-plus-volume transduction case is of particular interest because some polymer-coated surface acoustic wave (SAW) devices respond by this mechanism. The velocity changes are measured indirectly using the device as the resonant element in a delay line oscillator circuit and measuring the frequency shifts due to the vapor sorption [1][2][3].…”

“…An appropriate choice of coatings coupled with an adequate pattern recognition method leads to a selective chemical analysis which has already been shown to be successful in the qualitative as well as quantitative case [2,4,5]. A review on SAW device design, instrumentation of sensor systems and physical interactions underlying the sensing mechanism can be found in [6,7].…”