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Encapsulation of the aqueous core with a PLGA shell. (A) Fluorescent optical micrographs showing the stability of encapsulated cores containing Rhodamine B isothiocyanate–dextran submerged in water over a 24 h period. (B) Plots showing tunable passive release kinetics of HRP from capsule arrays, monitored by an ABTS substrate, achieved by varying the thickness of the PLGA shell (N = 3).
