@article { Sielmann2013a, title = {Inkjet printed all-polymer flexural plate wave sensors}, journal = {IEEE Sensors Special Issue on Flexible Sensors and Sensing Systems}, volume = {13}, year = {2013}, month = {11/2012}, pages = {4005-4013}, chapter = {4005}, abstract = {We discuss the fabrication and performance of an all-polymer, flexural plate wave gravimetric sensor using flexible, piezoelectric Polyvinylidene fluoride as the substrate and an inkjet-printed interdigital transducer (IDT) employing conductive poly(3, 4-ethylenedioxythiophene) poly(styrenesulfonate) to excite Lamb waves within the film. Lamb waves are measured both electronically, using a second IDT, and mapped directly using a scanning laser Doppler vibrometer. Pulsed wave excitation is utilized to isolate the weak acoustic signal from the electromagnetic crosstalk, enabling the measurement of relative changes in the resonant frequency, ?f/f0, in response to added mass, ?m, to the sensing area. A gravimetric mass sensitivity equivalent to ?f/(f0?m)=-153 cm2/g is measured by mass loading the sensor with printed polymer layers. It is found that the low stiffness of the substrate contributes significantly to the response of the sensor, yielding a measured overall sensitivity of ?f/(f0?m)=-83 cm2/g.}, author = {Christoph Sielmann and John Robert Busch and Konrad Walus and Boris Stoeber} }