Title :
Vapor detection with polysiloxane coated Love-wave devices. Influence of thin film viscoelastic properties: sensitivity analysis
Author :
Zimmermann, Celine ; Tamarin, Ollivier ; Rebière, Dominique ; Déjous, Corinne ; Pistre, Jacques ; Planade, Roger
Author_Institution :
Lab. IXL, Talence, France
Abstract :
In this paper, polysiloxane coated Love-wave devices are used to detect organophosphorus compounds. Theoretical calculation (analytical and numerical) has been undertaken taking into account sensitive coating shear modulus and viscosity on the Love-wave device sensitivity. A comparison with experimental results under gas (DMMP compounds) brings to light that a pure mass loading effect cannot explain the sensor response. According to several assumptions about polymer properties, an analysis of the detection mechanism is proposed and shows the influence of the coating viscoelastic properties
Keywords :
Love waves; gas sensors; organic compounds; polymer films; shear modulus; viscoelasticity; viscosity; DMMP; Love wave device; mass loading; organophosphorus compound; polysiloxane coating; sensitivity analysis; shear modulus; thin film; vapor detection; viscoelastic properties; viscosity; Acoustic devices; Acoustic sensors; Coatings; Dispersion; Elasticity; Mechanical factors; Substrates; Surface acoustic wave devices; Thin film devices; Viscosity;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.922594
