Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 111, Issue 35, Pages 13022-13027Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp073837q
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Single-crystalline hematite tube-in-tube nanostructures were prepared by a facile one-step hydrothermal method. The structure, shape, and formation mechanism of the tube-in-tube nanostructures were investigated. The results disclosed that the hematite tube-in-tube nanostructures were formed through a multisite dissolution process of the ellipsoid precursors. What is more, the tube-in-tube nanostructure is a single crystal in nature, and a simple combination of a small tube filling into a big one can be excluded. Single-crystalline magnetite and maghemite tube-in-tube nanostructures were also obtained via a simple reduction or reduction and reoxidation process with the hematite as the precursor. The facile and mild reaction route could be useful for the fabrication of complex tubular nanostructures.
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