FIG. 5.
Characterization of the solution passing through the magneto-fluidic nanoparticle trapping platform: (a) UV-Vis spectrum of the input and output solutions for the attractive polarity; (b) SERS spectra for core-shell magnetic nanoparticles with different particle concentrations: 3 × 109, 6 × 108, 3 × 107, 1.2 × 107, and 6 × 106 particles/ml; (c) concentration of the standard curve calculated using the data from (b) for core-shell magnetic nanoparticles and a plot of the output solution after magnetic trapping using attractive polarity; and (d) Raman spectra of the output solution for the different polarities: attractive, repulsive, and random (native).