Fig. 7From: Organic–inorganic hybrid nanoflowers: types, characteristics, and future prospectsScheme of preparation procedure of the FPSH capsules: a formation of protein–inorganic hybrid microflowers; b formation of (protamine-silica)2 bilayers on the microflowers; c formation of the FPSH capsules after eliminating the microflower template through EDTA treatment. Reproduced with permission from Ref. [56]: Copyright 2014, The Royal Society of ChemistryBack to article page