Rapid Synthesis of Polyethylenimine-Protected Prussian Blue Nanocubes through a Thermal Process

Polyethylenimine (PEI)-protected Prussian blue nanocubes have been simply synthesized by heating an acidic mixture of PEI, FeCl 3, K 3Fe(CN) 6, and KCl. The experiment results presented here demonstrate that the pH of the mixture plays an important role in controlling the shape and composition of the resultant product.