The Structural Characterizations of Polymethel(Methaacrylate) Doped Nanoparticle Metal (Cu,Co,Fe) Thin Film by Using Nd-Yag Laser Ablation (Published)
The structural properties of PMMA doped with ( Cu , Co , Fe ) nanoparticls prepared by laser ablation were studied . In this research the polymethyl mehtacrylate (PMMA) was dissolved in chloroform with (5%) concentration to form homogeneous solution. PMMA doped with (Cu ,Fe ,and Co ( nanoparticale (NPs) prepared by Nd-Yag(532nm) laser ablation. The X-ray diffraction shows that the structure of pure polymer film have an amorphous nature, but PMMA doped with (Cu , Co , Fe) nanoparticles are polycrystalline structure. The results indicate that there are a shifting and reduction in positions of peak intensity as compared with the pure (Cu , Co ,Fe) nanoparticles and there are generated some new peaks appear. The AFM examination reveal to reduction in average nanoparticle diameter after doping with NPs metal (Cu , Co , Fe ) . The FT-IR examination appear some transmittance band after doping with NPs metal (Cu , Co , Fe )
The prepared samples of thin-film by laser ablation method were achieved. Powders of doped cadmium oxide with cobalt of ratios (0,1,3,5,7)wt% were mixed and then compressing by approximately 10 tons. The samples were ablated by using Neodymium-YAG laser with 1000mW and obtained the plasma plume at 0.1mbar pressure and 250oC. Results indicate by using AFM, XRD and FTIR devices that the surface roughness and the size particle decrease with increasing dopants and there are existence stretching bonds of cadmium oxide with cobalt, and have of a multi-cubical polycrystalline .The doping leads to a small decrease in the intensity of the peaks of the cadmium oxide at (200) especially at a concentration of ratio 7%, but it was obtained lowering increase at (111), However, low peaks in most of them due to doping. Absorbance infrared ray have the greatest values of pure cadmium oxide at energies (617.61) (1117.31)(1458.62)(1624.15)(3450) cm -1 and also get a reduction in the absorption peaks as a result to doping with cobalt
Effects of Environmental , Alpha and Beta Particles on Lightly Doped p-n Junction Germanium films (Review Completed - Accepted)
The lightly aluminum and arsenic doped germanium films were prepared using thermal co-evaporation process to deposit p-n film junctions with (0.1wt%) concentration. The prepared films were exposed to circumstance and natural radionuclide (Ra226) emitted alpha and (Sr90) emitted beta particles after heat treatment with various dosages .The J-V characteristics refer to shifting in both forward and reverse bias and lead to increase in resistivity, initial and final threshold voltages, resistivity variation percentage, but damage percentages decreases after every stages of exposure. Also the change of current per unit volume increase with environmental exposure and fluency.