Manipulation of Crawling Growth for the Formation of Sub-millimeter Long ZnO Nanowalls

材料科学技术（英）, 2008, 24(4): 589-593.

^1, , ^2,

1.Department of Earth Sciences, University of Cambridge, U.K.;Max Planck Institute of Microstructure Physics, Halle, Germany

2.Faculty of Applied Science, Albert-Ludwig:s-University Freiburg, Germany;Max Planck Institute of Microstructure Physics, Halle, Germany

Manipulation of Crawling Growth for the Formation of Sub-millimeter Long ZnO Nanowalls

H.J.FAN ^1, , M.Zacharias ^2,

1.Department of Earth Sciences, University of Cambridge, U.K.;Max Planck Institute of Microstructure Physics, Halle, Germany

2.Faculty of Applied Science, Albert-Ludwig:s-University Freiburg, Germany;Max Planck Institute of Microstructure Physics, Halle, Germany

Keywords： Fe2O3 nanowire

The thermal stability of α-Fe2O3 and γ-Fe2O3 nanowires was studied by post annealing the samples at different temperatures. Before and after annealing, the samples were characterized by X-ray diffraction and scanning electron microscopy. The α-Fe2O3 nanowires are stable at the temperatures up to 600℃, and the crystalline structure becomes more perfect after annealing. This behavior supplies a way to improve the quality of the α-Fe2O3 nanowires. The γ-Fe2O3 nanowires become unstable when annealed at 350℃. Raman spectra of both nanowires have been measured, which also indicate that the 3'-Fe203 nanowires are transformed into α-Fe2O3 under the strong laser beam.

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Manipulation of Crawling Growth for the Formation of Sub-millimeter Long ZnO Nanowalls

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