Figure 6: Bio-interaction measurements using Fano resonances in capped aluminum nanoslits.
From: Highly Sensitive Aluminum-Based Biosensors using Tailorable Fano Resonances in Capped Nanostructures
(a) The measured transmission spectra in 10% APTES, 1 mg/mL BSA, and different concentrations of anti-BSA solutions from 1 pg/mL to 1 μg/mL for normally incident TM-polarized light. The inset shows a schematic to describe the interactions between anti-BSA and BSA. (b) The spectral intensity changes caused by different concentrations of anti-BSA solutions. The transmission spectrum of the BSA solution was set as a reference. (c) The intensity change at a wavelength of 476.75 nm as a function of the concentration of anti-BSA. (d) The intensity change at a wavelength of 476.75 nm as a function of the logarithm of the concentration of the anti-BSA solution. (e) The intensity change at a wavelength of 476.75 nm (Iλ=476.75 nm) as a function of time. (f) The measured transmission spectra in BSA and 3 kinds of antibodies solutions, penicillin binding protein 2α (PBP2α), Immunoglobulin A (IgA), anti-imidacloprid. Compared to the transmission spectrum of the BSA solution, the spectra of PBP2α, IgA, anti-imidacloprid antibodies remain unchanged.
