Formation of single-crystal γ-MnO2 nanowires at room temperature

In this study, single-crystal γ-MnO₂ nanowires have been successfully synthesized at room temperature in the absence of catalysts or templates, the diameter was found to be ca. 10–20 nm and the characteristic lengths up to several micrometers. The crystal phase of nanowires was confirmed by XRD and TEM measurements. Further, a dissolution– condensation–recrystallization process was proposed for the formation of nanowires under the room temperature condition.