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Great blue-shift of luminescence of ZnO nanoparticle array constructed from ZnO quantum dots.

Wang N, Yang Y, Yang G - Nanoscale Res Lett (2011)

Bottom Line: The cathodoluminescence measurements showed that there is a pronounced blue-shift of luminescence comparable to those of the bulk counterpart, which is suggested to originate from ZnO QDs with small size where the quantum confinement effect can work well.The fabrication mechanism of the ZnO nanoparticle array constructed from ZnO QDs was proposed, in which the immiscible-like interaction between ZnO nuclei and Si surface play a key role in the ZnO QDs cluster formation.These investigations showed the fabricated nanostructure has potential applications in ultraviolet emitters.

View Article: PubMed Central - HTML - PubMed

Affiliation: State Key Laboratory of Optoelectronic Materials and Technologies, Institute of Optoelectronic and Functional Composite Materials, Nanotechnology Research Center, School of Physics & Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong, P, R, China. stsygw@mail.sysu.edu.cn.

ABSTRACT
ZnO nanoparticle array has been fabricated on the Si substrate by a simple thermal chemical vapor transport and condensation without any metal catalysts. This ZnO nanoparticles array is constructed from ZnO quantum dots (QDs), and half-embedded in the amorphous silicon oxide layer on the surface of the Si substrate. The cathodoluminescence measurements showed that there is a pronounced blue-shift of luminescence comparable to those of the bulk counterpart, which is suggested to originate from ZnO QDs with small size where the quantum confinement effect can work well. The fabrication mechanism of the ZnO nanoparticle array constructed from ZnO QDs was proposed, in which the immiscible-like interaction between ZnO nuclei and Si surface play a key role in the ZnO QDs cluster formation. These investigations showed the fabricated nanostructure has potential applications in ultraviolet emitters.

No MeSH data available.


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The feature and structure of the prepared sample. SEM image (a) and corresponding XRD pattern (b) of the fabricated ZnO nanoparticle array.
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Figure 1: The feature and structure of the prepared sample. SEM image (a) and corresponding XRD pattern (b) of the fabricated ZnO nanoparticle array.

Mentions: The fabricated nanoparticle array is shown in Figure 1. Clearly, these nanoparticles are relatively uniform in size and array, isolated, and elliptical. They are half-embedded in the surface of the Si substrate. The corresponding XRD pattern (Figure 1b) can be indexed to be the wurtzite ZnO structure with (100) and (110) peaks. Therefore, these results show that the prepared nanoparticles are ZnO. Note that we can control the size of the fabricated nanoparticles by the growth conditions such as the growth time.


Great blue-shift of luminescence of ZnO nanoparticle array constructed from ZnO quantum dots.

Wang N, Yang Y, Yang G - Nanoscale Res Lett (2011)

The feature and structure of the prepared sample. SEM image (a) and corresponding XRD pattern (b) of the fabricated ZnO nanoparticle array.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211426&req=5

Figure 1: The feature and structure of the prepared sample. SEM image (a) and corresponding XRD pattern (b) of the fabricated ZnO nanoparticle array.
Mentions: The fabricated nanoparticle array is shown in Figure 1. Clearly, these nanoparticles are relatively uniform in size and array, isolated, and elliptical. They are half-embedded in the surface of the Si substrate. The corresponding XRD pattern (Figure 1b) can be indexed to be the wurtzite ZnO structure with (100) and (110) peaks. Therefore, these results show that the prepared nanoparticles are ZnO. Note that we can control the size of the fabricated nanoparticles by the growth conditions such as the growth time.

Bottom Line: The cathodoluminescence measurements showed that there is a pronounced blue-shift of luminescence comparable to those of the bulk counterpart, which is suggested to originate from ZnO QDs with small size where the quantum confinement effect can work well.The fabrication mechanism of the ZnO nanoparticle array constructed from ZnO QDs was proposed, in which the immiscible-like interaction between ZnO nuclei and Si surface play a key role in the ZnO QDs cluster formation.These investigations showed the fabricated nanostructure has potential applications in ultraviolet emitters.

View Article: PubMed Central - HTML - PubMed

Affiliation: State Key Laboratory of Optoelectronic Materials and Technologies, Institute of Optoelectronic and Functional Composite Materials, Nanotechnology Research Center, School of Physics & Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong, P, R, China. stsygw@mail.sysu.edu.cn.

ABSTRACT
ZnO nanoparticle array has been fabricated on the Si substrate by a simple thermal chemical vapor transport and condensation without any metal catalysts. This ZnO nanoparticles array is constructed from ZnO quantum dots (QDs), and half-embedded in the amorphous silicon oxide layer on the surface of the Si substrate. The cathodoluminescence measurements showed that there is a pronounced blue-shift of luminescence comparable to those of the bulk counterpart, which is suggested to originate from ZnO QDs with small size where the quantum confinement effect can work well. The fabrication mechanism of the ZnO nanoparticle array constructed from ZnO QDs was proposed, in which the immiscible-like interaction between ZnO nuclei and Si surface play a key role in the ZnO QDs cluster formation. These investigations showed the fabricated nanostructure has potential applications in ultraviolet emitters.

No MeSH data available.


Related in: MedlinePlus