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(A) Loading rate, embedding rate and (B) PFD release rate of heated 4/6/8-layer NCs and unheated 6-layer capsules; (C) Zeta potential of each layer in NC’s shell; TEM and schematic of (D) CaCO3 templates, (E) capsules with templates, (F) hollow capsules, (G) heated hollow NCs, (H) loaded capsules and (I) heated loaded NCs. (***, p < 0.0001).
