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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.


The photoluminescence spectrums of the feather-like, coral-like products and commercial AlN powders measured at room temperature. The emission intensities have been normalized by the blue emission peak of the feather-like samples.
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Figure 6: The photoluminescence spectrums of the feather-like, coral-like products and commercial AlN powders measured at room temperature. The emission intensities have been normalized by the blue emission peak of the feather-like samples.

Mentions: Figure 6 shows room temperature photoluminescence of AlN nanostructures prepared in the experiments, and some commercial AlN powders (D50 = 0.5 μm, AlN > 99%, O < 0.4%) were tested for comparison. The emission intensities have been normalized by the blue emission peak of the sample with feather-like nanostructures. The spectrum of the feather-like products shows a strong blue emission band centered at 438 nm (2.84 eV), whereas there is almost no visible light emission generated from the commercial AlN powders. The emission intensity of the coral-like products prepared by longer discharge time has shown a remarkable decrease compared with feather-like nanostructures.


Arc Discharge Synthesis and Photoluminescence of 3D Feather-like AlN Nanostructures
The photoluminescence spectrums of the feather-like, coral-like products and commercial AlN powders measured at room temperature. The emission intensities have been normalized by the blue emission peak of the feather-like samples.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 6: The photoluminescence spectrums of the feather-like, coral-like products and commercial AlN powders measured at room temperature. The emission intensities have been normalized by the blue emission peak of the feather-like samples.
Mentions: Figure 6 shows room temperature photoluminescence of AlN nanostructures prepared in the experiments, and some commercial AlN powders (D50 = 0.5 μm, AlN > 99%, O < 0.4%) were tested for comparison. The emission intensities have been normalized by the blue emission peak of the sample with feather-like nanostructures. The spectrum of the feather-like products shows a strong blue emission band centered at 438 nm (2.84 eV), whereas there is almost no visible light emission generated from the commercial AlN powders. The emission intensity of the coral-like products prepared by longer discharge time has shown a remarkable decrease compared with feather-like nanostructures.

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&deg; 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.