Fig. 2. Working range and mechanical properties of the biochemical sensors.
(A) Schematic illustration of the relative position of the sensing platform and the readout coil. (B and C) Resonance curves with varied lateral (B) and vertical (C) distance between the electromagnetic coupling unit and the readout coil. (D and E) Signal strength (D) and measurement precision (E) as a function of the lateral distance from the origin (z = 5 mm). (F) fs as a function of the vertical distance (x = y = 0). (G) Photographs of a stretchable sensor with a tensile strain (from 0 to 28%) applied to the serpentine wires. (H) Measured results of fs as a function of the damping resistance and applied strain. (I) SPICE simulation results of fs as a function of the parasitic inductance (Lp) and damping resistance (inset: equivalent circuit used for simulation).