QCM data obtained using a sensor with no MON coating (grey) and two sensors coated with Hf-BTB-NH2 MON (black and blue) are shown in Figure . Uncoated and MON-coated QCM sensors were exposed to control phage (grey and black). The uncoated QCM sensor showed no Δf and the MON-coated sensor with generic phage exhibited only a small Δf, which corresponds to an adsorbed amount of just 0.38 mg•m -2 . These observations indicate a weak interaction between the MON surface and the generic phage but no detectable interaction with the uncoated silica sensor control. In contrast, the selective phage (displaying FTVRDLS) exhibited a much greater Δf corresponding to an adsorbed amount of 1.87 mg•m -2 ; a 5-fold increase from the control phage. This confirms that phage display identified a selective peptide and that MON-based QCM sensors can be readily constructed.