Figure 5
Surface sensitivity tests of 900-nm-period silver capped nanoslits for different incident angles with wavelength interrogation by measuring BSA/anti-BSA interactions. Measured transmission spectra of the 1st order resonance mode of 900-nm-period capped silver nanoslits at incidence angles of (a) 0° and (b) 17° in air, BSA (1 mg/mL) and anti-BSA (25 μg/mL). (c) The resonance wavelengths of the 1st order modes as a function of the incident angle in different surface conditions. The inset shows the spectral shift as a function of the incident angle for the 1st order resonance mode. (d) The normalized spectral shift as a function of the resonance wavelength for the 1st order resonance mode.
