Yazar "Almousa, N." seçeneğine göre listele

Listeleniyor 1 - 6 / 6
  • Küçük Resim Yok
    Öğe
    Bacterial MgSe complex nanoparticle synthesis and electrical characterization of fabricated Ag/MgSe/p-Si hetero-structure under dark and illumination
    (Cell Press, 2023) Cakici, T.; Ozdal, O. Gur; Almousa, N.; Yildiz, F.; Khalil, H.; Ene, Antoaneta; Zakaly, Hesham M. H.
    The Pseudomonas aeruginosa OG1 strain was used in the bacterial synthesis of MgSe compound nanoparticles. The obtained samples were subsequently shaped into nanocrystalline MgSe films, and their optical, structural, morphological, and electrical properties were assessed on glass and p-Si substrates. Structural and morphological characterizations showed that the fabricated thin film samples have a polycrystalline structure with high quality and uniform grain sizes. The MgSe films produced on glass substrates exhibit a direct spectral band gap of 2.53 eV, according to optical measurements. The Ag/MgSe/p-Si layered diode structure was fabricated using the produced MgSe nanoparticles and then characterized by electrical properties. Electrical measurements were carried out under these two conditions to assess the effects of dark and illumination conditions on the band dynamics of the heterostructure devices. Under illumination, the barrier height decreased while the interface density states distribution increased. These measurements showed that using bacterial-assisted grown MgSe nanocrystalline films, the developed Ag/MgSe/ p-Si device structure exhibited a remarkable photoresponse and stable rectifying property. Green synthesis methods for the production of these nanocrystalline materials have the potential to offer low-cost alternatives for photosensitive applications.
  • Küçük Resim Yok
    Öğe
    Enhancing radiation shielding transmission factors and mechanical Robustness of borosilicate glasses through Bi2O3 modification: A comprehensive study
    (Elsevier Ltd, 2024) Almousa, N.; Issa, S.A.M.; Tekin, H.O.; Rammah, Y.S.; Mostafa, A.M.A.; Sen, Baykal, D.; Alshammari K.
    The mechanical behavior and gamma radiation attenuation features of borosilicate glasses with chemical compositions 16ZnO–8BaO-5.5SiO2-0.5Sb2O3-(70-x)B2O3/xBi2O3 are extensively investigated. Makishima-Mackenzie principle, Monte Carlo code, and Phy-X/PSD software are utilized in terms of determining these properties. Our results showed that the total packing density (Vt) decreased from 0.634851 to 0.571458, while the total dissociation energy increased from 26.612 (kJ/cm3) to 29.652 (kJ/cm3) for S1-glass (with 10 mol% of Bi2O3) and S5-glass (with 30 mol% Bi2O3). All elastic moduli are enhanced by increasing the Bi2O3 additive in the investigated glasses. Poisson's ratio was decreased from 0.281226 for S1-glass to 0.256957 for S5-glass. In terms of gamma-ray shielding parameters; linear (?) and mass attenuation (?m) coefficients for the rich glass sample with B2O3 (S5) possess the highest values among all investigated (S1–S5) samples. The glass sample S5 is reported with the lowest values of tenth (TVL) and half (HVL) value layers among all studied glasses. In addition, the exposure (EBF) and energy absorption (EABF) bulidup factors were decreased with increasing the amount of Bi2O3 reinforcement for mean free path values from 0.5 to 40 mfp. The lowest possible levels of attenuation (minimum transmission) were measured at a thickness of 3 cm for all of the glass samples. © 2024 Elsevier Ltd
  • Küçük Resim Yok
    Öğe
    Exploring elastic mechanics and radiation shielding efficacy in neodymium(III)-enhanced zinc tellurite glasses: a theoretical and applied physics perspective
    (Islamic Azad University, 2023) Zakaly, H.M.H.; Rammah, Y.S.; Issa, S.A.M.; Almousa, N.; El-Refaey, A.M.; Shams, M.S.
    The present work scrutinizes the radiation protection features and mechanical characteristics of neodymium zinc-tellurite of composition [(TeO2)70-(ZnO)30]1?x-(Nd2O3)x: x = 0 ? 5 mol% in steps of 1 (TZNd1 – 5). The Makishima–Mackenzie’s model was adopted for the computation of the Poisson’s ratio (PR) and elastic moduli. WinXcom and EXABCal software’s were performed to evaluate the radiation shielding parameters and buildup factors, respectively of TZNd-glasses. Results revealed that the increasing of Nd2O3 concentration in TZNd-glasses from 1 to 5 mol% had a positive effect on their elastic parameters: Young’s modulus increased from 53.13 to 54.81 GPa, bulk modulus changed from 31.95-33.65 GPa, and the PR varied from 0.222 to 0.228 for TZNd1 to TZNd5. There was a small increase in the Z/A as the Nd content increased, which leads to slight increase in TMSP of the particles. The mass attenuation coefficient (µm) increased in the order TZNd1 < TZNd2 < TZNd3 < TZNd4 < TZNd5. The maximum value of LAC obtained at 15 keV were 246, 249, 253, 257, and 260 cm?1 for TZNd1, TZNd2, TZNd3, TZNd4, and TZNd5, respectively. The HVT varies inversely with the linear attenuation coefficient. Throughout the considered energy spectrum the range of Ze f f for the glasses varied from 22.65 ?40.22, 22.64 ?40.25, 22.64 ?40.29, 22.63 ?40.32, and 22.63 ?40.36 for TZNd1, TZNd2, TZNd3, TZNd4, and TZNd5, respectively. The values of fast neutron removal cross section ?R showed a steady increase as the partial densities of Nd and oxygen of the TZNd-glass systems increased. Generally, one can conclude that the additive of Nd2O3 to TeO2-ZnO glasses leads to enhance their mechanical properties and increase their ability to absorb neutron and photon to apply in nuclear medicine applications. © 2023, Islamic Azad University. All rights reserved.
  • Küçük Resim Yok
    Öğe
    Nitrogen plasma synthesis of flexible supercapacitors based on reduced graphene oxide/aloe vera/carbon nanotubes nanocomposite
    (Springer Japan Kk, 2023) Atta, M. M.; Zakaly, Hesham M. H.; Almousa, N.; Reheem, A. M. Abdel; Madani, M.; Kandil, Usama. F.; Henaish, A. M. A.
    Flexible supercapacitors (FS) are ideal as power backups for upcoming stretchable electronics due to their high power density and good mechanical compliance. However, lacking technology for FS mass manufacturing is still a significant obstacle.The present study describes a novel method for preparing FS based on reduced graphene oxide (RGO) using the N+ plasma technique, in which N+ reduces graphene oxide on the surface of a cotton/polyester substrate. The effect of aloe vera (AV) as a natural reducing & capping agent and carbon nanotubes (CNT) as nanoconductors on the electrochemical performance of the electrodes is studied. FESEM and XPS were employed to investigate the electrodes' structural and chemical composition of electrodes. The galvanostatic charge-discharge curves of electrodes revealed the enhancement of the electrochemical activity of the as-prepared electrode upon additions of AV and CNT. The areal capacitance of the RGO, RGO/AV, and RGO/AV/CNT supercapacitors at 5 mV/s was 511, 1244.5, and 1879 mF/cm(2), respectively. The RGO electrode showed capacitive retention of 80.9% after 2000 cycles enhanced to 89.7% and 92% for RGO/AV and RGO/AV/CNT electrodes, respectively. The equivalent series resistance of the RGO electrode was 126.28 & omega;, decreased to 56.62 and 40.06 & omega; for RGO/AV and RGO/AV/CNT electrodes, respectively.
  • Küçük Resim Yok
    Öğe
    Nitrogen plasma synthesis of flexible supercapacitors based on reduced graphene oxide/aloe vera/carbon nanotubes nanocomposite (Jun, 10.1007/s42823-023-00548-6, 2023)
    (Springer Japan Kk, 2023) Atta, M. M.; Zakaly, Hesham M. H.; Almousa, N.; Reheem, A. M. Abdel; Madani, M.; Kandil, Usama. F.; Henaish, A. M. A.
    [Abstract Not Available]
  • Küçük Resim Yok
    Öğe
    Probing the elasticity and radiation protection potential of neodymium(III) doped zinc and niobium tellurite glasses: An integrated simulated and applied physics perspective
    (Elsevier, 2023) Zakaly, Hesham M. H.; Nabil, Islam M.; Issa, Shams A. M.; Almousa, N.; Khattari, Z. Y.; Rammah, Y. S.
    The present work scrutinizes the radiation protection features and mechanical characteristics of neodymium zinc-tellurite of composition (TeO2)(75)-(ZnO)(10) - (Nb2O5)(15-x) - (Nd2O3)(x): x = 0-9 mol%. An MCNP Monte Carlo simulation code and Phy-X software were performed to evaluate the radiation shielding parameters (e.g., linear attenuation coefficient (mu), mass attenuation coefficient (mu(m)), half value layer (H-1/2), etc. of the investigated TZNNd(x) glasses. Results revealed that the increasing of Nd2O3 concentration in TZNNd-glasses from 1 to 9 mol% had a positive effect on their elastic parameters: Young's modulus increased from 52.949 to 55.44 GPa, bulk modulus changed from 31.189 to 34.411 GPa, and the PR varied from 0.217 to 0.228 for TZNNd1 to TZNNd5. Compared to prior research on similar compositions, our findings indicate a more pronounced enhancement in both mechanical and Radiation shielding properties, suggesting an optimized composition strategy. The linear attenuation coefficient (mu) increased in the order TZNNd0 < TZNNd3 < TZNNd5 < TZNNd7 < TZNNd9. The half-value layer varies inversely with the linear attenuation coefficient and varies from 0.004 to 3.600 cm for TZNNd0, 0.003-3.453 cm for TZNNd3, 0.003-3.346 cm for TZNNd5, 0.003-3.253 cm for TZNNd7, and 0.003-3.159 cm for TZNNd9. Throughout the considered energy spectrum, the range of Z(eff) for the glasses varied from 44.98 to 30.51, 46.31 - 31.51, 47.13 - 32.18, 47.89 - 32.85, and 48.61 - 33.53 for TZNNd0, TZNNd3, TZNNd5, TZNNd7, and TZNNd9, respectively. Also, the values of fast neutron removal cross-section Sigma(R) were calculated and showed a steady increase as the partial densities of Nd and oxygen of the TZNNd-glass systems increased. The FNRCS (Sigma(R)) of the TZNNd glass samples have FNRCS values of 0.093, 0.106, 0.107, 0.108, and 0.109 cm(-1) for TZNNd0, TZNNd3, TZNNd5, TZNNd7, and TZNNd9, respectively Generally, one can conclude that the additive of Nd2O3 to Nb2O5-TeO2-ZnO glasses enhances their mechanical properties and increases their ability to absorb neutrons and photons to apply in nuclear medicine applications.