Deposition and characterization of alumina films produced by combustion flame pyrolysis

Kavitha, R.; Jayaram, Vikram

doi:10.1016/j.surfcoat.2006.04.022

Cited by 25 publications

(9 citation statements)

References 29 publications

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“…Al 2 O 3 nanoparticles can be synthesized by many techniques including ball milling, sol-gel, pyrolysis, sputtering, hydrothermal, and laser ablation [13][14][15][16][17][18]. Among them, the laser ablation is a widely used technique for the synthesis of nanoparticles since it can be synthesized in gas, vacuum or liquid.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Alumina Nanoparticles in Deionized Water Using Laser Ablation Technique

Piriyawong

Thongpool

Asanithi

et al. 2012

Journal of Nanomaterials

146

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Al2O3nanoparticles were synthesized using laser ablation of an aluminum (Al) target in deionized water. Nd:YAG laser, emitted the light at a wavelength of 1064 nm, was used as a light source. The laser ablation was carried out at different energies of 1, 3, and 5 J. The structure of ablated Al particles suspended in deionized water was investigated using X-ray diffraction (XRD). The XRD patterns revealed that the ablated Al particles transformed intoγ-Al2O3. The morphology of nanoparticles was investigated by field emission scanning electron microscopy (FE-SEM). The FE-SEM images showed that most of the nanoparticles obtained from all the ablated laser energies have spherical shape with a particle size of less than 100 nm. Furthermore, it was observed that the particle size increased with increasing the laser energy. The absorption spectra of Al2O3nanoparticles suspended in deionized water were recorded at room temperature using UV-visible spectroscopy. The absorption spectra show a strong peak at 210 nmarising from the presence of Al2O3nanoparticles. The results on absorption spectra are in good agreement with those investigated by XRD which confirmed the formation of Al2O3nanoparticles during the laser ablation of Al target in deionized water.

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Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Alumina Nanoparticles in Deionized Water Using Laser Ablation Technique

Piriyawong

Thongpool

Asanithi

et al. 2012

Journal of Nanomaterials

146

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“…It is outstanding from information in writing that for acquiring items of thick nanocrystalline Al 2 O 3 , both phases change from γ to α phase must be prevented or nanocrystalline α-Al 2 O 3 powders must be utilized [30][31][32]. Aluminum oxide nanoparticles can be the preparation by several methods containing electrolysis, hydrothermal, solgel, spray pyrolysis, plasma sputtering, laser ablation, and pulse laser deposition [33][34][35][36][37]. The purpose of this work is to synthesis a novel nanocomposite of two phases of aluminum oxide (alpha and gamma) by electrolysis method, which is considered a new with a nanocomposite because whole methods were prepared one phase structure.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Alpha-Gamma Aluminum Oxide Nanocomposite via Electrochemical Method for Antibacterial Activity

Rheima¹,

Anber²,

Abdullah³

et al. 2020

Nano BioMed ENG

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This work was devoted to synthesizing α-γ Al 2 O 3 nanocomposite by the electrolysis method. A plate of aluminum was used as the anode, while the graphite rod was used as the counter electrode (cathode). The structure and morphology were investigated and characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results indicated the average size of α-γ Al 2 O 3 nanocomposite was smaller than 10 nm. The value of inhibition zone indicated the nanocomposite's effect on different bacteria. The results demonstrated the newly synthesized nanocomposite as promising antimicrobial agents against bacteria.

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“…Al 2 O 3 is a wide band-gap (*6 eV at 300 k for bulk material) dielectric material which can exist in different crystalline forms such as gamma, delta, theta and alpha phases. Many techniques were used to prepare Al 2 O 3 nanoparticles such as sol-gel (Mirjalili et al 2010), sputtering (Trinh et al 2008), spray (Kavitha and Jayaram 2006), hydrothermal (Qu et al 2005), mechanical milling (Reid et al 2008) and laser ablation (Yatsui et al 2000). Synthesis of nanoparticles by pulsed laser ablation in liquid (PLAL) has many advantages compared to other conventional techniques: the produced nanoparticles are pure and have no impurities; the process does not need any complex agents; a large variety of materials may be synthesized; material stoichiometry is preserved; there is fair control on the size of the produced nanoparticles; the process is cost-effective and fast (Petersen and Barcikowski 2009;Yang et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of aluminum oxide nanoparticles by laser ablation in liquid as passivating and anti-reflection coating for silicon photodiodes

2017

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In this study, we have prepared aluminum oxide (Al 2 O 3 nanoparticles) NPs with size ranging from 50 to 90 nm by laser ablation of aluminum target in ethanol. The effect of laser fluence on the structural, morphological and optical properties of Al 2 O 3 was demonstrated and discussed. X-ray diffraction XRD results confirm that the synthesized Al 2 O 3 NPs are crystalline in nature. The sample prepared at 3.5 J/cm 2 /pulse exhibits single phase of c-Al 2 O 3 , while the XRD patterns of the nanoparticles synthesized at 5.3 and 7.5 J/cm 2 /pulse show the co-existence of the a-Al 2 O 3 and c-Al 2 O 3 phases. Nanostructured Al 2 O 3 films have been used as anti-reflecting coating and surface passivation layer to improve the photoresponse characteristics of silicon photodiode. The experimental data showed that the optical energy gap decreases from 5.3 to 5 eV as the laser fluence increases from 3.5 to 7.3 J/cm 2 . The lowest optical reflectivity was found for silicon photodiode deposited with a single layer of Al 2 O 3 prepared at 3.5 J/cm 2 /pulse. The effect of laser fluence on the refractive index and extinction coefficient of the nanostructured Al 2 O 3 film was studied. The photosensitivity of the silicon photodiode increased from 0.4 to 1.4 AW -1 at 800 nm after depositing Al 2 O 3 prepared at 3.5 J/cm 2 /pulse, followed by rapid thermal annealing at 400°C for 60 s.

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Deposition and characterization of alumina films produced by combustion flame pyrolysis

Cited by 25 publications

References 29 publications

Preparation and Characterization of Alumina Nanoparticles in Deionized Water Using Laser Ablation Technique

Preparation and Characterization of Alumina Nanoparticles in Deionized Water Using Laser Ablation Technique

Synthesis of Alpha-Gamma Aluminum Oxide Nanocomposite via Electrochemical Method for Antibacterial Activity

Preparation and characterization of aluminum oxide nanoparticles by laser ablation in liquid as passivating and anti-reflection coating for silicon photodiodes

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