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  1. Hashimah Hashim, Azyan Mohamad Shabari, Puteri Sarah Mohamad Saad
    ESTEEM Academic Journal, 2021;17(2):45-54.
    MyJurnal
    The optimised morphology of electrospun magnesium oxide (MgO)
    nanofibers (NFs) can be achieved according to the parameters set during the
    fabrication process. However, not all materials can be synthesized together
    as it depends on the application needs. This research aims to study the factors
    that influence the morphology of the MgO NFs due to material preparations
    and electrospinning parameters. The research is based on data obtained
    from previous research papers that were analysed using MATLAB R2019a
    software to evaluate the effect on MgO nanofibers synthesized with different
    materials. The study was focused on textural properties of nanofibers such
    as pore-volume and fiber diameter. Based on the analysis obtained,
    researchers need to consider using polymer material during the
    electrospinning fabrication. Each type of the polymer used will produce
    different values of the MgO NFs diameter after calcination process. Polypropylene glycol polymer showed a very significant difference in the fiber
    diameter size in the range of 60 to 76 nm as compared to polylactic acid
    produced big size of fiber diameter in between 3300 to 6900 nm.The analysis
    showed that the use of nitrogen as a carrier gas in the fabrication of
    electrospun MgO NFs may produce a good quality of the nanofibers.
  2. Puteri Sarah Mohamad Saad, Muhammad Nizar Aiman Mohd Zani, Anees Aziz, Hashimah Hashim
    ESTEEM Academic Journal, 2021;17(2):23-31.
    MyJurnal
    Tin Oxide (SnO2) is an n-type semiconductor with a direct bandgap of 3.6eV.
    It is highly conductive, transparent, and gas sensitive. The SnO2 can be
    unstable depending on certain parameters and methods to prepare it. In this
    work, the thin film of SnO2 doped with Al2O3 was deposited by
    electrospinning on glass substrates. The thin films were then annealed at
    100°C, 200°C, 300°C, 400°C, 500°C, and then the optical and physical films
    were examined. Measurements of X-Ray Diffraction (XRD) and Microscope
    were performed for structural and morphological analysis. The optical
    characteristics were analyzed using the UV-Vis spectrophotometer. As the
    annealing temperature increases, the optical transmittance also increases
    due to the increase in film homogeneity and the degree of crystallinity of the
    film. The rise in temperature leads to a decrease in absorption values.
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