Effects of post-laser irradiation on the optical and structure properties of Al2O3 nanoparticles produced by laser ablation

Abstract

Alumina nanoparticles with different average particle sizes were synthesized by pulsed laser ablation of Al plates in ethanol, followed by laser irradiation at different times. Their optical and structural properties were investigated by different techniques. The experimental work showed that as the time of post-laser irradiation increased, the average particles’ size of alumina decreased. The decrease in the particle size is detected by using x-ray diffraction (XRD) technique and UV-visible absorption spectroscopy technique (UV–VIS) and characterized by laser-induced breakdown spectroscopy (LIBS). The LIBS technique was utilized as a diagnostic tool with XRD and UV–VIS for determining the nanoparticles’ size. Laser-induced plasma parameters such as electron density and electron temperature were determined. A relationship has been established between the electron temperature and the nanoparticles’ size. The results reflect the significance of correcting the spectral intensity of the emitted line for the effect of self-absorption in the LIBS experiment.

New Construction of Functionalized CuO/Al2O3 Nanocomposite-Based Polymeric Sensor for Potentiometric Estimation of Naltrexone Hydrochloride in Commercial Formulations

“…Some recent studies reported the synthesis of CuONPs and Al 2 O 3 NPs by various techniques, including pyrolysis, sol-gel, sputtering, laser ablation and electrochemical reduction [23][24][25][26][27][28][29][30][31][32]. Sodeifian and Behnood [33] reported a microwave-assisted method for the synthesis of CuO/Al 2 O 3 nanocomposite for photocatalytic degradation of methylene blue removal from aqueous solution under UV irradiation.…”

Synthesis and characterizations iron oxide carbon nanotubes nanocomposite by laser ablation for anti-microbial applications

“…Figure 3 exhibits the histograms of the anti-bacterial activity against two gram-negative E. coli and K. pneumoniae pathogens which were induced by carbon nanotubes at 400 μg ml −1 concentration and composite multi-walled carbon nanotubes doped with iron oxide NPs at three different concentrations ratios (20, 38, 42%). Figure 5 shows the inhibition zone (IZ) image of carbon nanotubes of 400 μg ml −1 which represented as control without adding iron oxide nanoparticles, and composite carbon and iron oxide NPs in three concentrations that maintained above according to [ 8 , 9 , 20 , 21 ].

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“…Figure 3 exhibits the histograms of the anti-bacterial activity against two gram-negative E. coli and K. pneumoniae pathogens which were induced by carbon nanotubes at 400 μg ml −1 concentration and composite multi-walled carbon nanotubes doped with iron oxide NPs at three different concentrations ratios (20, 38, 42%). Figure 5 shows the inhibition zone (IZ) image of carbon nanotubes of 400 μg ml −1 which represented as control without adding iron oxide nanoparticles, and composite carbon and iron oxide NPs in three concentrations that maintained above according to [8,9,20,21]. Figures 5 and 6 demonstrate the histograms and inhibition zone (IZ) image, respectively, of the anti-bacterial growth in media against gram-positive Streptococcus pyogens (S. pyogenes) and Staphylococcus aureus (S. aureus) pathogens which were induced by carbon nanotubes at 400 μg ml −1 concentration and composite carbon nanotubes doped with iron oxide NPs at three different concentrations ratios (20, 38, 42%) that goes with [4,8,9,14,15].…”

“…Likewise, the fundamental technique is fluid substrate methodology in particular gathering of carbon tube nanocomposite masterminded in two laser dynamisms 85 mJ and 250 mJ at that point stimulate it with various Fe 3 O 4 /CNTs, the greatest results were gotten from the 400 μg ml −1 of carbon nanotube stimulating with some kind extents of Fe 3 O 4 /CNTs nanocomposite [20,21]. The composite nanopowder that indicated the finest anti-microbial development in the liquid medium system are attempted ceaselessly procedure the incredible scattering technique and reveal that the best centralization of carbon tubes in concentration at 400 μg ml −1 which show the influence in anti-microbial actions that are improved and turned out to be better when it doped with 43% Fe 3 O 4 [8,[16][17][18][19][20].…”

Removal of Ni(II) Ions by Poly(Vinyl Alcohol)/Al2O3 Nanocomposite Film via Laser Ablation in Liquid

“…Furthermore, A. Mostafa et al showed the capability for preparing different metal oxides embedded in PVA structure in just a one-pot method by ablating metal plates (Al, Cd, and Cu) in PVA solution [ 40 ]. Moreover, A. Mostafa et al showed another facility laser parameter to enhance the PLAL method, by making laser irradiation after the laser ablation process to decrease the particle size of the prepared Al 2 O 3 NPs [ 41 ]. Furthermore, the previous contributions of Al 2 O 3 -PVA nanocomposite for the removal of heavy metals or degraded organic pollutants can be summarized in Table 1 .…”