Abstract
The viscoelastic properties of thin polymer layers coated on a thickness shear mode (TSM) resonator is investigated by analysis of the impedance spectra of the resonator. The response of resonators coated with polyethleneoxide (PEO) and polydimethylsiloxane (PDMS) to organic vapours is described. The PEO coated sensor shows the conventional Sauerbrey behaviour of a negative frequency shift with adsorbed mass, but the PDMS coated sensors show a strong positive frequency shift. The complex shear modulus for these layers is calculated and it is found that the PDMS is in the rubbery state. The in-diffusion of organic vapours leads to a further softening of the layer which produces the positive frequency shift.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
