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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.


XRD pattern of the products with all peaks indexed to wurtzite-structure AlN (h-AlN).
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Figure 1: XRD pattern of the products with all peaks indexed to wurtzite-structure AlN (h-AlN).

Mentions: The arc discharge experiments have been carried out with a series of current, from 100 to 200 A. Amazing products had been prepared at 180 A, and the discharge time was set at 30 and 60 s. The as-grown products prepared by different discharge time have almost the same XRD pattern. Figure 1 shows a typical XRD pattern of the products. All the peaks in the pattern could be indexed to a wurtzite-structure AlN (h-AlN) crystalline structure with lattice constants of a = b = 0.3111 nm and c = 0.4979 nm (JCPDS: 25-1133), which shows that pure wurtzite-AlN can be prepared by arc discharge.


Arc Discharge Synthesis and Photoluminescence of 3D Feather-like AlN Nanostructures
XRD pattern of the products with all peaks indexed to wurtzite-structure AlN (h-AlN).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 1: XRD pattern of the products with all peaks indexed to wurtzite-structure AlN (h-AlN).
Mentions: The arc discharge experiments have been carried out with a series of current, from 100 to 200 A. Amazing products had been prepared at 180 A, and the discharge time was set at 30 and 60 s. The as-grown products prepared by different discharge time have almost the same XRD pattern. Figure 1 shows a typical XRD pattern of the products. All the peaks in the pattern could be indexed to a wurtzite-structure AlN (h-AlN) crystalline structure with lattice constants of a = b = 0.3111 nm and c = 0.4979 nm (JCPDS: 25-1133), which shows that pure wurtzite-AlN can be prepared by arc discharge.

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.