Pollen-like ZIF-8 colloidosomesviaemulsion templating and etching

We report a one-pot emulsion-templating strategy for the preparation of ZIF-8 microcapsules both in the presence and absence of surfactants. Capsule diameter is tuneable in the range 1-10 μm, and they can be post-synthetically etched with excess imidazole to form hierarchical architectures resembling Oleaceae pollen grains.