Crystallization of Prussian Blue Analogs beneath Langmuir Films

A positively charged monolayer spread at the gas−water interface was used to induce the crystallization of Prussian Blue derivatives. The interfacial crystal nucleation and growth lead to nanocubes oriented parallel to the interface. Such processes appear at much lower concentrations of the precursor ions than in bulk. These experiments open new opportunities for selecting the crystalline phases of various molecular materials.