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(a) UV absorbance at 416 nm of the oxidation of ABTS by nanoreactors upon the addition of different concentrations of urea. (b) Lifetimes (black line) of the nanoreactor “ON” state and relative yield (red line) as a function of urea concentration. (c) Reversible nanoreactor “ON–OFF” modulation in time following repeated additions of 6.0 mM urea. Experimental conditions: Urease, 30 U/mL; HRP, 10 U/mL; ABTS, 8 mM; H2O2, 5 mM.
