SAW biosensors based on different sensitive layers for the detection of E. coli.
Type of substrate | Wave mode | Dielectric constant | TCF (ppm per °C) | Velocity (m s−1) | Detection limit or sensitivity | Reference |
---|---|---|---|---|---|---|
64°YX LiNbO3 | SH-SAW | 85.2 | 80 | 4742 | 1.8 × 10−15 M | 55 |
AIN | Love wave | 8.5 | 19 | 5700 | 6.54 × 105 CFU mL−1 | 45 |
LiTaO3 | SH-SAW (LGS) | 470 | −33 | 4160 | 106 cells per mL | 56 |
SiO2 | Love wave | 3.8 | — | — | 105 cells per mL | 57 |