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In the present study, the effect of Zinc nanoparticles on levels of (T3 , T4 and TSH) hormones was investigated. Zinc nanoparticles were synthesized by Laser induced plasma.The Nd: YAG Nd: YAG laser with a wavelength of 1064 nm was used to generate nanomaterials of the elements (zinc) upon collision with target atoms. Plasma generated by different...
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... XRD pattern of nanoparticle Ag2S powder is indicated in figure 2. It can be seen that the powder is polycrystalline and contain monoclinic crystal structure [8] and no amorphous phase is detected. The location of peaks (2 and their corresponding plane (hkl) have been illustrated in Figure 2. The XRD pattern of nanoparticle Ag2S films deposited by PLD technique on ITO substrate at different laser energies from 400 mJ to 900 mJ is presented in figure (3). The influence of laser energy was studied at room temperature and it can be seen that all films are polycrystalline and contain a monoclinic structure and no amorphous is detected. ...
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Citations
... This is due to its simplicity, effectiveness, ease of experimental setup, high purity (free of surface contamination), and the low number of chemical species required for production [10]. This technique uses high-intensity short pulses up to a nanosecond from an infrared laser source in the focusing condition to produce a tiny particle with unique properties in the nanoscale form via laser-matter interaction [11,12]. ...
In recent years, biologists, chemists, materials scientists, and engineers have become interested in Nano-sized particles because of their unique properties. In this paper, ZnO nanoparticles were synthesized using an Nd: YAG laser with 800 mJ at 1064 nm and 532 nm (the fundamental and second harmonic wavelengths). The characteristics of optical, morphological, structural, wettability and antibacterial activity have been studied. The used technique of PLAL was successful in nanoparticle formation. It was proved in color changes, which was an indication of ZnO nanoparticle formation. The optical measurements show a decrease in absorption wavelength and an increase in the band gap, an indication of the formation of quantum confinement due to nanoparticle formation. The XRD involves the formation of polycrystalline ZnO at both wavelengths. Also, the FE-SEM proved the formation of nanoparticles with a semispherical shape and little agglomeration on the surface. However, the EDX shows Zn and O in the film, which means the formation of ZnO. The low contact angle indicates high wettability, which means that the material has high biocompatibility. Finally, the antibacterial test was done on two types of bacteria (E. coli and S. aurous) and showed an antibacterial effect on both types with different NP concentrations.
The effect of laser wavelength was fully studied and examined for Nb2O5 nanoparticles prepared by laser ablation of niobium plate in pure water. 1064 and 532 nm wavelengths were used. Using x-ray diffraction two different crystal structures were identified, Orthorhombic T-Nb2O5 and Monoclinic H-Nb2O5 for the two wavelengths respectively. A high concentration of spherical, well-defined, and tiny nanoparticles was recognized using a 532 nm laser compared to 1064 nm wavelength employing SEM and TEM images. Strong Raman peaks located at 301.7 cm-1 for orthorhombic T-Nb2O5 and at 922.01 confirming the formation of mono-clinic H-Nb2O5 for two wavelengths respectively, these results were confirmed by FTIR results which present peaks at 675.5 and 705.9 cm-1related to the same phases. The Eds results show highly stoichiometric crystal reached about 95% using 532 nm laser wave length.
