Optical Sensing of Attached Fibrinogen on Carbon Doped Titanium Surfaces

Figure 2

Complex effective dielectric constants (dielectric permittivity) for treated titanium surfaces at 𝐸_𝜆=1.959 eV. 𝑁_IF=1 ≡ polished titanium, 𝑁_IF=2 ≡ Ti_0.82–C_0.18, 𝑁_IF=3 ≡ Ti_0.38–C_0.62, 𝑁_IF=4 ≡ Ti_0.09–C_0.91, and 𝑁_IF=5 ≡ Ti_0.00–C_1.00 (diamond-like carbon). The standard deviations in permittivity 𝜀^′and dielectric loss 𝜀^′′ directions are indicated on each dielectric constant by horizontal and vertical lines. Parameters for the line are as follows: 𝜀^′′=𝑎𝜀^′+𝑏, where 𝑎=1.634 and 𝑏=−5.877.