Synthesis and characterization of GaN/quartz nanostructure using pulsed laser ablation in liquid

Fakhri, Makram A.; Alwahib, Ali Abdulkhaleq; Salim, Evan T.; Amir, Husam Aldin A. Abdul; Alsultany, Forat H.; Hashim, U.

doi:10.1088/1402-4896/ac9866

Cited by 10 publications

(3 citation statements)

References 50 publications

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“…XRD identification of the core–shell configuration 119 – 121 showed that these results are in line with the study 122 . When exposed to X-ray radiation, the greater concentrations of aggregated silver nanoparticles resulted in a greater degree of reflection 123 , 124 . For the WO 3 sample, two peaks appeared at 2θ: 28.92° and 58.84°.…”

Section: Resultsmentioning

confidence: 99%

Mesoporous Ag@WO3 core–shell, an investigation at different concentrated environment employing laser ablation in liquid

Salim,

Saimon,

Muhsin

et al. 2024

Sci Rep

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In this study, silver-tungsten oxide core–shell nanoparticles (Ag–WO3 NPs) were synthesized by pulsed laser ablation in liquid employing a (1.06 µm) Q-switched Nd:YAG laser, at different Ag colloidal concentration environment (different core concentration). The produced Ag–WO3 core–shell NPs were subjected to characterization using UV–visible spectrophotometry, X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive spectroscopy, electrical analysis, and photoluminescence PL. The UV–visible spectra exhibited distinct absorption peaks at around 200 and 405 nm, which attributed to the occurrence of surface Plasmon resonance of Ag NPs and WO3 NPs, respectively. The absorbance values of the Ag–WO3 core–shell NPs increased as the core concentrations rose, while the band gap decreased by 2.73–2.5 eV, The (PL) results exhibited prominent peaks with a central wavelength of 456, 458, 458, 464, and 466 nm. Additionally, the PL intensity of the Ag–WO3-NP samples increased proportionally with the concentration of the core. Furthermore, the redshift seen at the peak of the PL emission band may be attributed to the quantum confinement effect. EDX analysis can verify the creation process of the Ag–WO3 core–shell nanostructure. XRD analysis confirms the presence of Ag and WO3 (NPs). The TEM images provided a good visualization of the core-spherical shell structure of the Ag–WO3 core–shell NPs. The average size of the particles ranged from 30.5 to 89 (nm). The electrical characteristics showed an increase in electrical conductivity from (5.89 × 10−4) (Ω cm)−1 to (9.91 × 10−4) (Ω cm)−1, with a drop in average activation energy values of (0.155 eV) and (0.084 eV) at a concentration of 1.6 μg/mL of silver.

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Section: Resultsmentioning

confidence: 99%

Mesoporous Ag@WO3 core–shell, an investigation at different concentrated environment employing laser ablation in liquid

Salim,

Saimon,

Muhsin

et al. 2024

Sci Rep

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“…Figure 4 (a,b,c) illustrated the transmission, absorption and the energy gap of the grown In2O3 thin film over the quartz substrate at different laser energies ranging from 1200 mJ -2000 mJ [42][43][44]. As the laser energy increase the transmission decrease while the absorption increased due to the increased of the deposition rate which leads to increase the thin film thickness, the highest transmission observed at 1200 mJ with the lowest absorption [45][46][47].…”

Section: Resultsmentioning

confidence: 99%

Optical Investigation of In2O3/ Quartz Nano-films Deposited at Different Laser Energies

Dua’a R. T. Alrayyes,

Ali A. Alwahib,

Makram A. Fakhri

et al. 2024

IJNeaM

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The study conducted in this research focuses on the deposition of In2O3 thin films onto quartz substrates using the pulsed laser deposition technique (PLD). The importance of this study lies in the exploration of the optical properties of these thin films under varying laser energies (1200 mJ, 1400mJ, 1600mJ, 1800 mJ, and 2000 mJ), and the subsequent determination of their energy band gaps. In the pursuit of enhancing our understanding of In2O3 thin films, this research exhibits a direct relationship between the laser energy and laser band gap. It was discovered that the energy band gap of thin In2O3 films increased due to the increase in laser energy. This phenomenon resulted in an overall blue shift from the fundamental energy gap of In2O3 thin films. The significance of this study extends to potential applications in various fields. In2O3 thin films with tunable energy band gaps can find applications in optoelectronics, photovoltaic and other emerging technologies. This research not only contributes to the fundamental understandings of thin film properties but also offers a pathway for tailoring their characteristics for specific applications, thus advancing the field of materials science and engineering.

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“…The target is mounted on the platform; it spins to avoid colliding in the same place, and to ensure the best removal, the laser impacts the target at a 45-degree angle. [42][43][44].…”

Section: Gan Films Are Prepared By Pldmentioning

confidence: 99%

Physical Investigations of GaN/Porous Silicon at Different Laser Wavelengths

Rusul S. Rashed,

Makram A. Fakhri,

Ali A. Alwahib

et al. 2024

IJNeaM

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In this study, we prepared PSi using the laser-assisted electrochemical etching method and deposited Gallium nitride (GaN) on the PSi substrate using the pulsed laser technique at different pulsed laser wavelengths (1064, 532, and 355 nm). We investigated the optical, structural, topographical, and morphological properties of Gallium Nitride on the substrate PSi by various pulsed laser wavelengths. The X-Ray Diffraction (XRD) analysis revealed that gallium nitride on PSi was polycrystalline and hexagonal, cubic structural at 532 nm, with a high peak intensity and crystallite size at 2θ=36.96°and 57.80 related to (101) and (110) planes, respectively, while the c-GaN phase is observed at 2θ = 25.43 degrees and is reflected from the (200) plane. PL shows two emission peaks were observed for the GaN film (430,345,413 nm) and the PSi substrate (867,891,876 nm), and the energy gap increased as the wavelength decreased. The field emission scanning electron microscopy (FESEM) pictures revealed that the synthetic sample had an average size of 24.45, 23.91, and 21.30 nm, and the nanoparticles appeared spherical and similar to cauliflower. The atomic force microscopy (AFM) results showed that the average roughness was 7.62, 10.64, and 13.62 nm, respectively, and it was observed the root mean square increased as a result of the uniform distribution of high-quality crystals and the excellent quality of the crystal structure. The UV-Visible (UV) results showed that the transmission decreased with a decrease in wavelength, and the absorption was inversely proportional to the transmission.

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Synthesis and characterization of GaN/quartz nanostructure using pulsed laser ablation in liquid

Cited by 10 publications

References 50 publications

Mesoporous Ag@WO3 core–shell, an investigation at different concentrated environment employing laser ablation in liquid

Mesoporous Ag@WO3 core–shell, an investigation at different concentrated environment employing laser ablation in liquid

Optical Investigation of In2O3/ Quartz Nano-films Deposited at Different Laser Energies

Physical Investigations of GaN/Porous Silicon at Different Laser Wavelengths

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