Perovskite chemical gardens: highly fluorescent microtubes from self-assembly and ion exchange.

Published in: Chemical communications (Cambridge, England) (2022)

We report the shape-preserving conversion of self-assembled CaCO 3 microtubes to PbCO 3 and MAPbBr 3 perovskite. The first step induces the growth of cerussite needles on the outer surface. When further converted, these hedgehog-like structures become fluorescent. Additional spatial control of the process yields Janus tubes of CaCO 3 and perovskite segments.

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