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  1. Article

    Open Access

    Analogous electronic states in graphene and planer metallic quantum dots

    Graphene nanostructures offer wide range of applications due to their distinguished and tunable electronic properties. Recently, atomic and molecular graphene were modeled following simple free-electron scatte...

    Ahmed M. Othman, Mohammad A. Kher-Elden, Fatma Ibraheem… in Scientific Reports (2024)

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    Article

    Towards superior structural, optical and magnetic properties, and ligand field effects of \({\text{B}}_{2} {\text{O}}_{3}\) –ZnO–CoO glass doped with alkaline metal earth cations

    Herein, the effect of changing the alkaline earth metal cations type on the structure-properties of cobalt zinc borate glass was demonstrated. A series of spectroscopic analyses such as X-ray diffraction (XRD)...

    F. Ahmad, Hesham Y. Amin, Moukhtar A. Hassan in Optical and Quantum Electronics (2023)

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    Article

    Effect of SiO2 Addition on Chromium Transitions in Borate Glasses

    Melt-quenching technique was used to prepare borosilicate glasses of composition xSiO2- (75-x) B2O3–24.7Li2O-0.3Cr2O3 (x = 0, 10, 20, 30, 40 and 50 mol%). With increasing the former content, both Cr6+ and Cr3+ op...

    M. Farouk, Dhia-Aldin Slibi, Z. M. Abd El-Fattah, M. Atallah, M. A. El-Sherbiny… in Silicon (2021)

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    Article

    Optical transitions from hexavalent chromium in lithium-borate glasses

    The melt-quenching technique was used to prepare a series of chromium-doped borate glasses with the composition xCr2O3–(70 − x) B2O3–30 Li2O–(x = 0, 0.1, 0.2, 0.3 and 0.5 mol %). The low-do** level here employe...

    Dhia-Aldin Slibi, Moukhtar A. Hassan… in Optical and Quantum Electronics (2021)

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    Article

    Multiple optical features in binary-transition-metal borate glasses

    Glasses doped with transition metal (TM) ions exhibit rich optical transitions spanning the entire ultraviolet, visible, and infrared spectral regimes. Here we utilize the melt-quenching technique to synthesis...

    Moukhtar A. Hassan, M. A. Ashoush, F. M. Ebrahim… in Optical and Quantum Electronics (2021)

  6. No Access

    Article

    Characterization of borate glasses doped with copper oxide for optical application

    Borate glasses having the formula x CuO–(50 − x)B2O3–30Na2O–20ZnO where x = 0, 0.2, 0.5, 1, 4 and 7 mol% were investigated. The samples were prepared using the conventional melt-quenching technique. Physical prop...

    A. Samir, Moukhtar A. Hassan, A. Abokhadra… in Optical and Quantum Electronics (2019)