VOC detection using an all polymer flexural plate wave sensor

Author

Berring, J. ; Sielmann, C. ; Stoeber, Boris ; Walus, K.

Author_Institution

Univ. of British Columbia, Vancouver, BC, Canada

fYear

2013

fDate

16-20 June 2013

Firstpage

274

Lastpage

277

Abstract

We have developed an all-polymer, micro-inkjet printed, flexural plate wave (FPW) sensor for toluene vapor detection. The sensor consists of a piezoelectric polyvinylidene fluoride (PVDF) substrate with conductive polyethylenedioxythiophene polystyrene sulfonate (PEDOT:PSS) interdigitated transducers (IDTs) and a polymer sensing layer coating for selective absorption of a targeted analyte. Sensor performance is investigated by exposing polyvinyl acetate (PVAc) and polystyrene (PS) sensing layers to varying concentrations of toluene vapor. The resulting frequency shift, due to mass loading, expansion and softening of the sensing layers, is compared with predictions using a semi empirical model. In this work, Flory-Huggins solution theory is used to predict the mechanical response of the sensing layers to solvent vapor concentrations.

Keywords

absorption; coatings; conducting polymers; gas sensors; ink jet printers; ink jet printing; interdigital transducers; microfabrication; microsensors; FPW; Flory-Huggins solution theory; PS; PVAc; PVDF substrate; VOC detection; all-polymer microinkjet printed flexural plate wave sensor; conductive PEDOT:PSS IDT; interdigitated transducer; mass loading; piezoelectric polyvinylidene fluoride substrate; polyethylenedioxythiophene polystyrene sulfonate; polymer sensing layer coating; polystyrene; polyvinyl acetate; semi empirical model; solvent vapor concentration; targeted analyte absorption; toluene vapor detection; Polymers; Resonant frequency; Sensors; Solvents; Stress; Substrates; Young´s modulus; FPW; Flory-Huggins; PVDF; VOC sensing;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII), 2013 Transducers & Eurosensors XXVII: The 17th International Conference on

Conference_Location

Barcelona

Type

conf

DOI

10.1109/Transducers.2013.6626755

Filename

6626755