Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 112, Issue 2, Pages 365-369Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp0743875
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Manganese oxides are important materials in many applications. We describe, for the first time, the facile one-pot synthesis of highly crystallined lambda-MnO2 nanodisks assembled from nanoparticles through a novel wet chemical route. Morphology evolutions, magnetic properties, and phase transitions are also studied by transmission electron microscopy, scanning electron rnicroscopy and thermal gravimetric analysis. A mechanism for the formation of the lambda-MnO2 nanodisks as well as their inner structure is proposed based on controlled experiments. The key to the successful preparation of this novel MnO2 nanostructure has been a synergic control of a surfactant, polyvinylpyrrolidone, and a solvent, dimethyl sulfoxide, capable of stabilizing the microreactors and promoting the assembly of manganese nanoparticles.
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