Figure 5.
Use of nanotags in a sandwich immunoassay for IgG. (a) Dipstick flow immunoassay scheme. (b) Resulting strips from running individual nanotags with the five reporters (strips 2–6) and strip from the mixture of all nanotags (strip 7). Strip 1 is the negative control. (c) SERS spectra of the negative control, the five nanotags and the mixture (mix).