Study of iron-catalysed growth of β-Ga2O3nanowires and their detailed characterization using TEM, Raman and cathodoluminescence techniques

Kumar S, Sarau G, Tessarek C, Bashouti MY, Haehnel A, Christiansen S, Singh R (2014)

Publication Type: Journal article

Publication year: 2014

Journal

Journal of Physics D: Applied Physics IOP Publishing: Hybrid Open Access

Book Volume: 47

Article Number: 435101

Journal Issue: 43

DOI: 10.1088/0022-3727/47/43/435101

Abstract

In this paper, we demonstrate a new catalyst (Fe) to grow single crystalline beta-gallium oxide (β-Ga2O3) nanowires (NWs) via the vapour-liquid-solid mechanism using the chemical vapour deposition technique. The structural studies of these NWs showed the highly crystalline monoclinic phase of Ga2O3. This was confirmed by detailed scanning transmission electron microscope investigations demonstrating the NW to be single crystalline β-Ga2O3, growing along the normal of the (1 1 1) plane. We also compared Raman and cathodoluminescence (CL) properties of the as-grown β-Ga2O3NWs with a bulk Ga2O3single crystal grown by the Czochralski method. It was observed that Raman peak positions of a single β-Ga2O3NW had a red frequency shift of about 0.3-1.4 cm-1as compared to a bulk Ga2O3single crystal, which was in fact quite small. In addition, the CL measurements of β-Ga2O3NWs and the bulk Ga2O3single crystal exhibited similar spectra, having a strong broad UV-blue emission band and a weak red emission band. Moreover, the structural, morphological and optical properties of Fe-catalysed β-Ga2O3NWs were comparable to those of Au-catalysed β-Ga2O3NWs.

Involved external institutions

Indian Institute of Technology Bombay IN India (IN) Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE) Max-Planck-Institut für Mikrostrukturphysik (MSP) / Max Planck Institute for Microstructure Physics DE Germany (DE)

How to cite

APA:

Kumar, S., Sarau, G., Tessarek, C., Bashouti, M.Y., Haehnel, A., Christiansen, S., & Singh, R. (2014). Study of iron-catalysed growth of β-Ga2O3nanowires and their detailed characterization using TEM, Raman and cathodoluminescence techniques. Journal of Physics D: Applied Physics, 47(43). https://doi.org/10.1088/0022-3727/47/43/435101

MLA:

Kumar, Sudheer, et al. "Study of iron-catalysed growth of β-Ga2O3nanowires and their detailed characterization using TEM, Raman and cathodoluminescence techniques." Journal of Physics D: Applied Physics 47.43 (2014).

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