TY  - GEN
A1  - Nguyen, Vu Hoa
A1  - Richert, S.
A1  - Park, Hyunji
A1  - Böker, Alexander
A1  - Schnakenberg, Uwe
T1  - Single interdigital transducer as surface acoustic wave impedance sensor
T2  - Biosensors
N2  - Surface acoustic wave (SAW) devices are well-known for gravimetric sensor applications. In biosensing applications, chemical-and biochemically evoked adsorption processes at surfaces are detected in liquid environments using delay-line or resonator sensor configurations, preferably in combination with appropriate microfluidic devices. In this paper, a novel SAW-based impedance sensor type is introduced which uses only one interdigital electrode transducer (IDT) simultaneously as SAW generator and sensor element. It is shown that the amplitude of the reflected S-11 signal directly depends on the input impedance of the SAW device. The input impedance is strongly influenced by mass adsorption which causes a characteristic and measurable impedance mismatch.
KW  - SAW impedance sensor
KW  - microfluidic
KW  - PHEMA
Y1  - 2017
U6  - https://doi.org/10.1016/j.protcy.2017.04.032
SN  - 2212-0173
VL  - 27
SP  - 70
EP  - 71
PB  - Elsevier
CY  - Amsterdam
ER  -