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Arc Discharge Synthesis and Photoluminescence of 3D Feather-like AlN Nanostructures

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ABSTRACT

A complex three-dimensional (3D) feather-like AlN nanostructure was synthesized by a direct reaction of high-purity Al granules with nitrogen using an arc discharge method. By adjusting the discharge time, a coral-like nanostructure, which evolved from the feather-like nanostructure, has also been observed. The novel 3D feather-like AlN nanostructure has a hierarchical dendritic structure, which means that the angle between the trunk stem and its branch is always about 30° in any part of the structure. The fine branches on the surface of the feather-like nanostructure have shown a uniform fish scale shape, which are about 100 nm long, 10 nm thick and several tens of nanometers in width. An alternate growth model has been proposed to explain the novel nanostructure. The spectrum of the feather-like products shows a strong blue emission band centered at 438 nm (2.84 eV), which indicates their potential application as blue light-emitting diodes.

No MeSH data available.


Typical SEM images of the coral-like AlN nanostructures: a a low-magnification SEM image of high-density as-grown coral-like products; b shows a clear dendritic structure; c a close view of fine branches with melt-out surface.
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Figure 2: Typical SEM images of the coral-like AlN nanostructures: a a low-magnification SEM image of high-density as-grown coral-like products; b shows a clear dendritic structure; c a close view of fine branches with melt-out surface.

Mentions: A nice coral-like microstructure was prepared using 180 A discharge current for 60 s, as illustrated in Figure 2. The as-grown AlN "coral" has a clear dendritic structure. The length of the trunk is about several tens of micrometers, and diameters are less than 10 μm. Figure 2c shows the fine structure of the coral that has a smooth melt-out surface. The small branches, shown in Figure 2c, have a length of several micrometers, and the diameter is about several hundreds of nanometers. The melt-out surface of the small branches means that the temperature was too high that AlN crystals began to melt.


Arc Discharge Synthesis and Photoluminescence of 3D Feather-like AlN Nanostructures
Typical SEM images of the coral-like AlN nanostructures: a a low-magnification SEM image of high-density as-grown coral-like products; b shows a clear dendritic structure; c a close view of fine branches with melt-out surface.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211165&req=5

Figure 2: Typical SEM images of the coral-like AlN nanostructures: a a low-magnification SEM image of high-density as-grown coral-like products; b shows a clear dendritic structure; c a close view of fine branches with melt-out surface.
Mentions: A nice coral-like microstructure was prepared using 180 A discharge current for 60 s, as illustrated in Figure 2. The as-grown AlN "coral" has a clear dendritic structure. The length of the trunk is about several tens of micrometers, and diameters are less than 10 μm. Figure 2c shows the fine structure of the coral that has a smooth melt-out surface. The small branches, shown in Figure 2c, have a length of several micrometers, and the diameter is about several hundreds of nanometers. The melt-out surface of the small branches means that the temperature was too high that AlN crystals began to melt.

View Article: PubMed Central - HTML - PubMed

ABSTRACT

A complex three-dimensional (3D) feather-like AlN nanostructure was synthesized by a direct reaction of high-purity Al granules with nitrogen using an arc discharge method. By adjusting the discharge time, a coral-like nanostructure, which evolved from the feather-like nanostructure, has also been observed. The novel 3D feather-like AlN nanostructure has a hierarchical dendritic structure, which means that the angle between the trunk stem and its branch is always about 30° in any part of the structure. The fine branches on the surface of the feather-like nanostructure have shown a uniform fish scale shape, which are about 100 nm long, 10 nm thick and several tens of nanometers in width. An alternate growth model has been proposed to explain the novel nanostructure. The spectrum of the feather-like products shows a strong blue emission band centered at 438 nm (2.84 eV), which indicates their potential application as blue light-emitting diodes.

No MeSH data available.