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Novel, low-cost solid-liquid-solid process for the synthesis of α-Si(3)N(4) nanowires at lower temperatures and their luminescence properties
Ultra-long, single crystal, α-Si(3)N(4) nanowires sheathed with amorphous silicon oxide were synthesised by an improved, simplified solid-liquid-solid (SLS) method at 1150 °C without using flowing gases (N(2), CH(4), Ar, NH(3), etc.). Phases, chemical composition, and structural characterisation usi...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660443/ https://www.ncbi.nlm.nih.gov/pubmed/26607395 http://dx.doi.org/10.1038/srep17250 |
Sumario: | Ultra-long, single crystal, α-Si(3)N(4) nanowires sheathed with amorphous silicon oxide were synthesised by an improved, simplified solid-liquid-solid (SLS) method at 1150 °C without using flowing gases (N(2), CH(4), Ar, NH(3), etc.). Phases, chemical composition, and structural characterisation using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM/HRTEM), Fourier-transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS) showed that the nanowires had Si(3)N(4)@SiO(x) core-shell structures. The growth of the nanowires was governed by the solid-liquid-solid (SLS) mechanism. The room temperature photoluminescence (PL) and cathodoluminescence (CL) spectra showed that the optical properties of the α-Si(3)N(4) nanowires can be changed along with the excitation wavelength or the excitation light source. This work can be useful, not only for simplifying the design and synthesis of Si-related nanostructures, but also for developing new generation nanodevices with changeable photoelectronic properties. |
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