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Issue 34, 2016
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Enhancing photoluminescence properties of SiC/SiO2 coaxial nanocables by making oxygen vacancies

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Abstract

Coaxial nanocables (CNs) with an SiC core and a SiO2 shell were fabricated at a large scale by a simple and low cost method. The thickness of the SiO2 shell could be controlled by etching in 1 M NaOH aqueous solution for different amounts of time. XRD, SEM, TEM, HRTEM, PL and UV–Vis spectra were adopted to investigate the morphology and optical properties of the obtained SiC/SiO2CNs. Blue photoluminescence was observed at room temperature from the coaxial structure. The intensity of the single emission band at 468 nm (2.65 eV) exhibited a strong dependence on the thickness of the SiO2 layer and was significantly enhanced when the outer SiO2 shell had a thickness of 2.8 nm. The enhancement effect was attributed to oxygen vacancies (OV) and this was verified by deliberately enriching the surface OV through hydrogen treatment.

Graphical abstract: Enhancing photoluminescence properties of SiC/SiO2 coaxial nanocables by making oxygen vacancies

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Publication details

The article was received on 15 Jun 2016, accepted on 28 Jul 2016 and first published on 28 Jul 2016


Article type: Paper
DOI: 10.1039/C6DT02049F
Dalton Trans., 2016,45, 13503-13508

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    Enhancing photoluminescence properties of SiC/SiO2 coaxial nanocables by making oxygen vacancies

    W. Liu, J. Chen, T. Yang, K. Chou and X. Hou, Dalton Trans., 2016, 45, 13503
    DOI: 10.1039/C6DT02049F

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