Title :
Comparative study of GB and DMMP vapor detections using guided shear horizontal acoustic wave platforms
Author :
Zimmermann, C. ; Rebiere, D. ; Dejous, C. ; Pistre, J. ; Planade, R.
Author_Institution :
ENSEIRB, Bordeaux I Univ., Pessac, France
Abstract :
When studying GB sensors, researchers use DMMP (dimethylmethylphosphonate) to mimics GB and then extrapolate responses to GB detection. In this paper we present experimental results concerning GB and DMMP detection, using guided SH-SAW devices (Shear Horizontal-Surface Acoustic Wave). Then we are able to compare responses and to bring to light some important discrepancies between the two gases responses, both in a static and a dynamic way. An estimation of the diffusion coefficient of each gas (GB and DMMP) allows to link the dynamic of the responses with the sorption kinetics. In a static point of view, we give some hypothesis from the chemical structures of these two compounds to explain the differences in interactions with polysiloxane polymer.
Keywords :
Love waves; acoustic waveguides; chemical structure; diffusion; polymer blends; polymer structure; sorption; surface acoustic wave sensors; chemical structure; diffusion coefficient; dimethylmethylphosphonate; polysiloxane polymer; sensors; shear horizontal acoustic wave platforms; shear horizontal surface acoustic wave device; sorption; vapor detections; Acoustic propagation; Acoustic sensors; Acoustic signal detection; Acoustic waves; Chemical compounds; Chemical sensors; Coatings; Gases; Nonhomogeneous media; Polymer films;
Conference_Titel :
TRANSDUCERS, Solid-State Sensors, Actuators and Microsystems, 12th International Conference on, 2003
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-7731-1
DOI :
10.1109/SENSOR.2003.1215569
