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Issue 24, 2013
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Core–shell Zn2GeO4 nanorods and their size-dependent photoluminescence properties

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Abstract

Size-tunable crystalline core–crystalline shell Zn2GeO4 nanorods were synthesized via a facile hydrothermal reaction. High purity Zn2GeO4 nanorods were obtained at pH = 7. The length of Zn2GeO4 nanorods (L = 50–100 nm) can be controlled through a one-step process, while micro-sized nanorods with an aspect ratio of the length to the diameter of 10 were yielded in a two-step process. The single crystalline nature of Zn2GeO4 nanorods with a core–shell structure was verified by high resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) measurements. The Raman study revealed that there is no oxygen defect Image ID:c3nr04638a-t1.gif in Zn2GeO4 nanocrystals, suggesting that photoluminescence emission of Zn2GeO4 can be attributed to the presence of the interstitial Zn defect Image ID:c3nr04638a-t2.gif in Zn2GeO4 nanocrystals. As the diameter of nanorods decreased, the excitation and emission peaks appeared to be redshifted due to the quantum size effect.

Graphical abstract: Core–shell Zn2GeO4 nanorods and their size-dependent photoluminescence properties

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Submitted
03 Sep 2013
Accepted
03 Oct 2013
First published
07 Oct 2013

Nanoscale, 2013,5, 12335-12341
Article type
Paper

Core–shell Zn2GeO4 nanorods and their size-dependent photoluminescence properties

S. Wu, Z. Wang, X. Ouyang and Z. Lin, Nanoscale, 2013, 5, 12335
DOI: 10.1039/C3NR04638A

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