Fig. 5From: A magneto-optical biochip for rapid assay based on the Cotton–Mouton effect of γ-Fe2O3@Au core/shell nanoparticlesa Dependence of the concentration of spike glycoprotein Cspike (μg/ml) with respect to the CM rotation angle δ (μrad) form our MO CM biochips (the red line in the figure is the fitting curve of the logistic function), b results of the dilution linearity of the MO CM assay (insert: magnified image for low Nominal concentration)Back to article page