Patterned and switchable surfaces for biomaterial applications

Reflectivity (%)Chapter 5 – Surface plasmon resonance imaging of polymer microarrays100908070605040302010048 49 50 51 52 53 54 55Angle of incidence ( o )Figure 5.6. Theoretical SPR reflectivity (%) against angle of incidence as modelledby Fresnel equations using Winspall software based on a five-layer system ofa glass prism (η = 1.71129), a 45 nm gold layer (η = 0.16 + 4.84i), a PLLpolymer layer of varied thickness; (■) uncoated, (■) 1 nm, (■) 5 nm, (■) 10nm, (■) 20 nm, (■) 30 nm, (■) 40 nm, (■) 50 nm, (■) 75 nm, (■) 100 nm, (■)200 nm (η = 1.37), with (dotted) and without (solid) a 5 nm biopolymer layer(η = 1.45) and an infinite water layer (η = 1.32908).5-178