Sensitivity Improvement of an Impedimetric Immunosensor Using Functionalized Iron Oxide Nanoparticles

Table 1

Optical parameters obtained by fitting the SPR curves for system 1 based on SAM.

Layer	Thickness (nm)	𝑛	kapa	𝜀^′	𝜀^′′
Bare gold	50.72	0.17	3.988	−15.87	1.355
Thiol	2.16	1.34	0	1.791	0
GA	0.1	1.45	0	2.10	0
Nev.	0.8	1.45	0	2.10	0
Ab	0.4	1.45	0,	2.10	0