Fig 1: Biosensing experiments with the UHF-SAW resonators. (a) Frequency shift to the functionalization for the slow and fast modes. The averages and standard errors of the various chips are shown. (b) Slow mode and fast mode shift. A Lorentz fit of sensor A was performed before (green) and after (red) the addition of the functionalization. (c) The frequency shift of the GFAP and the PBS control for the slow and fast modes. The averages and standard errors of the various chips are shown in the figure. (d) The slow mode and fast mode shift. A Lorentz fit of sensor A was performed before (green) and after (red) the addition of GFAP and polyclonal antibody.