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. Author manuscript; available in PMC: 2012 May 1.
Published in final edited form as: Anal Chem. 2011 Apr 6;83(9):3572–3580. doi: 10.1021/ac200317z

Figure 3.

Figure 3

Real -time shifts in resonance wavelength from representative microring resonators functionalized with unique antibodies upon exposure to a) PSA, and b) AFP in a kinetic titration assay format. In both panels, solutions containing the targeted antigen at the listed concentrations (in units of zng/mL) are introduced for 1.5 minutes at time points indicated by black arrow. After this association phase, the solution was switched to buffer (as indicated with asterisks) and a 4.5 minute dissociation phase was recorded.