Enhanced Sensitivity of Surface Plasmon Resonance Biosensor Functionalized with Doped Polyaniline Composites for the Detection of Low-Concentration Acetone Vapour

Table 3

Optical constants values used in SPR studies.

Material	Refractive index (); (633 nm)	Extinction coefficient (); (633 nm)	Real part dielectric constant; (633 nm)	Ref.
Dry air	1.0026			[65]
PANI/chitosan	1.8957	0.0910	3.5853	Equations ((1)–(12))
Ternary	2.6973	0.1249	7.2599	Equations ((1)–(12))
Acetone vapour	1.0011	—	—	[65]
SF11 glass prism	1.7786	3.8652E-08	3.1633	[77]