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Cumulative shift of the etalon’s m = 3 reflectance peak with different amounts of (a) PAH-biotin100:1 (b) streptavidin added to PAH–biotin100:1. The pNIPAm-co-AAc microgel-based etalon was soaked in pH 7.2 throughout the experiment, while the temperature was maintained at 25 °C. Each point represents the average of at least three independent measurements, and the error bars are standard deviation for those values. Reprinted with the permission of [65] Copyright © 2013, Elsevier.
