Nazir, S and Masood, S and Shivashankar, SA and Sheikh, FA and Majeed, S (2024) A facile route to synthesize β-Ga2O3 nanoparticles from γ-polymorph through a rapid microwave route and their optical properties. In: Vietnam Journal of Chemistry .
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Abstract
Due to the wide bandgap, monoclinic structure and thermodynamic stability, β-polymorph form of Ga2O3 nanomaterials is well-received for various applications. However, as the γ-Ga2O3 is difficult to synthesize, less attention has been paid towards it and its conversion to β-polymorph. This paper reports the single-step synthesis of γ-Ga2O3 using a microwave-assisted procedure. In this regard, γ-Ga2O3 powders are synthesized in minutes using benzyl alcohol as the solvent using gallium acetylacetone as the precursor. The XRD of the as-prepared powders indicates the formation of the γ-Ga2O3 phase, the very broad peaks indicative of the small crystallite size as confirmed by TEM. The γ-Ga2O3 powders were annealed at different temperatures and the complete phase conversion of γ-Ga2O3 phase to β-Ga2O3 phase happens at 700 °C. The TEM analysis shows the crystallite size to be �10 nm for the annealed β-Ga2O3 phase. The as-prepared nanopowders show very weak luminescence under excitation and in contrast, a blue-green emission is observed in case of annealed powders. This confirms the presented strategy as having the potential to use β-Ga2O3 nanopowders for different optoelectronic applications. © 2024 Vietnam Academy of Science and Technology and Wiley-VCH GmbH.
| Item Type: | Journal Article |
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| Publication: | Vietnam Journal of Chemistry |
| Publisher: | John Wiley and Sons Inc |
| Additional Information: | The copyright for this article belongs to authors. |
| Keywords: | Acetone; Annealing; Crystallite size; Luminescence; Nanoparticles; Nanostructured materials; Optical properties; Powders; Synthesis (chemical), Benzyl alcohol; FTIR; Microwave routes; Microwave synthesis; Microwave-assisted; Monoclinic structures; Nano powders; Single-step synthesis; Synthesised; Wide-band-gap, Gallium compounds |
| Department/Centre: | Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering |
| Date Deposited: | 19 Jul 2024 11:23 |
| Last Modified: | 19 Jul 2024 11:23 |
| URI: | http://eprints.iisc.ac.in/id/eprint/84832 |
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