Sahar Naji Rashid

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Verified

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• Ph.D in Physics
• Assistant Prof at University of Tikrit

This work aimed to study the synthesis and characterization of nickel (Ni) and cobalt (Co) nanoparticles, as well as (Co@Ni) and (Ni@Co) core-shell nanoparticles. Pulsed laser ablation in liquid (PLAL) technique using Nd:YAG laser at wavelength (1064 nm) was used in the synthesis in deionized water, and important structural and optical characteriza...

In this work, the effect of laser irradiation on the optical properties of magnesium oxide thin films was investigated and evaluated. Thin films of magnesium oxide were prepared at a concentration of 0.2 M by depositing them on glass slides by drop casting method at temperature of 30-40 °C, then irradiating these films with a 5mW diode laser radiat...

Pulsed laser ablation in liquids is a process that has many advantages over traditional methods used to prepare nanoparticles. A piece of pure, polished nickel metal was used to prepare nanoparticles using pulsed laser ablation technique in ethanol using Nd:YAG laser with three wavelengths (1064, 532, and 355nm) and three energies (50, 100, and 150...

Photoluminescence emission from weakly coupled molecules has been investigated by placing a thin organic semiconductor film in one dimensional micropillar microcavities. The structure consisted of a Poly(methyl methacrylate) PMMA and red-emitting organic semiconductor (Red-F) thin film sandwiched between pair layers of dielectric mirrors made of ma...

Laser applications cover various fields in science and technology including physics, chemistry, biology, electronics, and medicine. In this work, the effect of irradiation with two different energies of red diode laser on (2 M) of calcium chloride solution was studied by investigating the optical properties and chemical composition by both UV-visib...

In this work, the effect of laser irradiation on the optical properties of magnesium oxide thin films was investigated and evaluated. Thin films of magnesium oxide were prepared at a concentration of 0.2 M by depositing them on glass slides by drop casting method at temperature of 30-40 °C, then irradiating these films with a 5mW diode laser radiat...

One of the physical methods for manufacturing nanoparticles that adopts a top-down approach is the laser ablation method, which is characterized by ease, speed, and low cost. In this work, we resorted to using this method to fabricate nanoparticles from zinc by ablation with Q-switched Nd:YAG laser in ethanol, with the repetition rate of pulses (6...

In recent investigations, secondary bacterial infections were found to be strongly related to mortality in COVID-19 patients. In addition, Pseudomonas aeruginosa and Methicillin-resistant Staphylococcus aureus (MRSA) bacteria played an important role in the series of bacterial infections that accompany infection in COVID-19. The objective of the pr...

Pulsed laser ablation in liquid (PLAL) is considered a relatively fast, simple to manipulate, cost-effective abraoch, and enables the fabrecation of multiscale micro-nanostructures in one step, facilitating the fabrication process. Copper nanoparticles solution was prepared by PLAL technique using Nd:YAG laser in deionized water at (532 nm), (1000...

This work focused on studying the effect of the green diode laser on the external appearance of white ants (termites) (Psammotermes hypostoma) and then finding the percentage of mortality resulting from this beam of wavelength (532 nm), energy (100 mW), and exposure times (60, 70, 80, 90 & 100)sec at (5, 10)cm for each exposure time. The results re...

Pulsed laser ablation in liquid (PLAL) technique can produce high purity nanoparticles, it is a top-down physical method based on the principle of dividing metal ion bulk precursors into metal atoms, this method was used in this work to synthesis cobalt nanoparticals (CoPNs) with the use of Nd: YAG laser with two wavelengths (355 nm) and (532 nm) a...

The pulsed laser ablation of a metallic target in the liquid (PLAL) is a modern and good method for creating a variety of nanomaterials that have piqued the interest of researchers in the last decade. It is used in this work to prepare zinc nanoparticles and zinc oxide nanoparticles (ZnPNs and ZnO NPs) using Nd: YAG laser with the two wavelengths (...

Pulsed laser ablation in liquid (PLAL) technique can produce high purity nanoparticles, it is a top-down physical method based on the principle of dividing metal ion bulk precursors into metal atoms, this method is used in this work to synthesis copper nanoparticals (CuPNs) by use Nd: YAG laser with two wavelengths (355 nm) and (532 nm) at energies...

The subject of biophysics is interdisciplinary and covers various fields of biology and physics. In this research the effect of some parameters of Nd:YAG laser on ants (Camponotus consobrinus) has been studied . This includes the effect on its external shape, as well as the percentage of the killing rate obtained. A laser radiation of a wavelength...

Biophysics subject covers multiple fields of physics and biology. In this research the effect of some parameters of diode laser has been experimented with ants (Camponotus consobrinus) which includes the effect on its external shape, as well as the percentage of the killing rate obtained as a result of laser radiation at a wavelength (532 nm) with...

In this study, cadmium oxide (CdO) was deposited on glass bases by thermal chemical spraying technique at three concentrations (0.05, 0.1, 0.15) M and then was irradiated by CO 2 laser with 10.6 μm wave length and 1W power. The results of the atomic force microscope AFM test showed that the surfaces of these CdO thin films were homogenous and that...

In this work, the effect of the laser on the material was studied through the interaction of carbon dioxide (CO 2) laser radiation with zinc oxide (ZnO) thin films, where laser irradiation is one of the most important industrial applications which have been studied in several researches and are still in continuous development. ZnO thin films were d...

In this study we examined the effect of pulse Nd:YAG laser radiation on the cowpea beetle (Callosobruchus maculates(Fab)) in terms of changes in the external appearance of this insect (shape and color), and calculated the percentage of death rate due to Nd:YAG laser irradiation of wavelength (1064 nm) with energies: (300, 360, 420 & 480) mJ and exp...

In this study we examined the effect of pulse Nd:YAG laser radiation on the flour beetle (Tribalium castaneum) in terms of changes in the external appearance of this insect (shape and color), and calculated the percentage of death rate due to Nd:YAG laser irradiation of wavelength (1064 nm) with energies: (260, 300, 340, 380 & 420)mJ and exposure t...

In this study we examined the effect of pulse Nd:YAG laser radiation on the flour beetle (Tribalium castaneum) in terms of changes in the external appearance of this insect (shape and color), and calculated the percentage of death rate due to Nd:YAG laser irradiation of wavelength (1064 nm) with energies: (260, 300, 340, 380 & 420)mJ and exposure t...

In this study, the effect of laser radiation on the Tribalium castaneum was examined in terms of changes in the external appearance of this insect in terms of shape and color, as well as the calculation of the percentage of death rate due to diode laser irradiation of wavelength (532 nm) and power (1 W) which was conducted at three distances (10, 1...

This study includes the study of the effect of compressive pressure on the selected range (3,4,5) on the physical properties and X-ray attenuation of the compound (Al60%, Ni 10%, MgO 30%). (808nm) and 1Watt on the properties of this compound for different time periods (min (0,5,10,15,20). The effect of compressing pressure and time of surface treat...

In the present paper , we have tabulate the screening parameters and the differential cross section of Mott scattering by Aluminum nucleus in the energy range(10-0.005)MeV and angles) 180 15 (0 0    by employing Mackinely-Fashbach equation as well as we have calculate the ratio For the energy range (50-350)MeV for the same angles, by using the i...

Laser heat treatment is one of the important industrial applications of laser and being studied at the present time as a substitute for conventional thermal annealing. In this research (ZnO) thin films have been deposition on a glass by (Sol - Gel / Spin Coating) technique and annealed by two ways, the first one using a convection oven, where they...

Laser heat treatment is one of the important industrial applications of laser and being studied at the present time as a substitute for conventional thermal annealing. In this research (CuO) thin films have been deposition on a glass by (Sol-Gel / Spin Coating) technique and annealed by two ways, the first one using a convection oven, where they we...