Publication:
Niobium pentoxide nanostructures fabricated by the fundamental qSwitched Nd-YAG PLD under vacuum conditions
Niobium pentoxide nanostructures fabricated by the fundamental qSwitched Nd-YAG PLD under vacuum conditions
Date
2022-12
Authors
Suhair R. Shafeeq
Evan T. Salim
Mohammed Jalal Abdul Razzaq
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Research Projects
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Abstract
In this paper, we outline the successful preparation of a nanostructured Nb₂O₅ thin film by utilizing Q-switched Nd:YAG pulsed laser in a vacuum environment. The deposition was performed with the fundamental wavelength, 350ºC as substrate temperature and laser energy of 657 mJ. The film optical, structural, topographical, and morphological properties were investigated by the UV-Visible spectrophotometer, photoluminescence, XRD analyses, AFM, and FE-SEM. The elemental compositions were also tested by EDX analyses. The estimated indirect band gap value (confirmed by PL) agreed with many reported works and studies. It was also well suited for various applications. The data extracted from XRD profile provided well-defined Polycrystalline peaks with the orthorhombic phase (T-Nb₂O₅) as the predominant plane. Monoclinic (H-Nb₂O₅), commonly formed at very high route temperatures, was interestingly formed by PLD technique at a substrate temperature of only 350ºC. The obtained structures were characterized without any post- annealing treatment.
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Keywords
Nanostructured,
Orthorhombic,
PLD,
Quantum dot