Self-catalytic growth of β-Ga2O3 nanostructures by chemical vapor deposition

Kumar S, Tessarek C, Sarau G, Christiansen S, Singh R (2015)

Publication Type: Journal article

Publication year: 2015

Journal

Advanced Engineering Materials Wiley

Book Volume: 17

Pages Range: 709-715

Journal Issue: 5

DOI: 10.1002/adem.201400289

Abstract

In this work, we have studied the synthesis of single crystalline self-catalyzed beta gallium oxide (β-Ga2O3) nanostructures by chemical vapor deposition technique. We have adopted a new approach to grow the nanostructures instead of using conventional foreign metal nano-catalyst based-approaches. The as-grown nanostructures including nanowires and nanosheets (NSHs) were grown on spin-coated Ga2O3 films. The structural studies such as X-ray diffraction, Raman and transmission electron microscope (TEM) investigations on the nanostructures showed monoclinic phase of Ga2O3 and single crystalline structure. Furthermore, high-resolution TEM with a selected area electron diffraction pattern recorded on a single β-Ga2O3 nanowire and nanosheet verified their single crystalline nature, having [001] as favorable growth direction. The energy dispersive X-ray spectroscopy-elemental mapping of as-grown nanostructures indicated uniform distribution of Ga and O. Cathodoluminescence imaging and spectrum revealed excellent luminescence characteristics of nanostructures with a broad UV-blue emission band (1.80-4.20-eV-nm) centered at 2.64-eV. This study also highlights the growth mechanism of NSHs. These β-Ga2O3 nanostructures have great potential in nanofunctional devices. Self catalytic growth of beta-gallium oxide (β-Ga2O3) nanostructures has been reported. The detail structural, morphological and optical analyses of as-grown nanostructures are carried out using various techniques such as X-ray diffraction, scanning electron microscopy, high resolution transmission electron microscopy, Raman and cathodoluminescence. The as-grown nanostructures are monoclinic and single crystalline with excellent optical properties.

Involved external institutions

Indian Institute of Technology (IIT), Delhi

India (IN) Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light

Germany (DE)

How to cite

APA:

Kumar, S., Tessarek, C., Sarau, G., Christiansen, S., & Singh, R. (2015). Self-catalytic growth of β-Ga2O3 nanostructures by chemical vapor deposition. Advanced Engineering Materials, 17(5), 709-715. https://doi.org/10.1002/adem.201400289

MLA:

Kumar, Sudheer, et al. "Self-catalytic growth of β-Ga2O3 nanostructures by chemical vapor deposition." Advanced Engineering Materials 17.5 (2015): 709-715.

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