Effects of graphite on the synthesis of 1-D single crystal In2O3 nanostructures at high temperature |
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Affiliation: | 1. DropSens, S.L., Ed. CEEI, Parque Tecnológico de Asturias, 33428 Llanera, Asturias, Spain;2. Department of Chemistry, Universidad de Burgos, Pza. Misael Bañuelos s/n, E-09001, Burgos, Spain |
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Abstract: | This study investigated the effects of graphite powder on the growth mechanisms of one-dimensional (1-D) single-crystal indium oxide (In2O3) nanostructures. The study was conducted using a chemical vapor deposition (CVD) method at 1000 °C; In2O3 and graphite powder mixed with In2O3, with a weight ratio of 1:1, were used as the source material, while 2 nm-thick n-type silicon (100), coated with a gold catalyst, was used as a substrate. It was observed that nanostructures grew via a Vapor-Liquid-Solid (VLS) growth mechanism when only In2O3 was used, but grew via both VLS and Vapor-Solid (VS) growth mechanisms when graphite powder was used with the In2O3. The morphology and crystal structures of the nanostructures grown were investigated using X-Ray Diffraction (XRD), High Resolution Transmission Electron Microscopy (HR-TEM), Field Emission Scanning Electron Microscopy (FESEM) and Energy Dispersion X-Ray Spectroscopy (EDS). At room temperature (RT), all the nanostructures showed photoluminescence (PL) spectra at a wavelength of 367 nm in the UV-emission region and at wavelengths of 470 and 630 nm in the visible region. |
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Keywords: | Indium oxide FESEM HR-TEM XRD Photoluminescence Graphite powder |
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