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Humaini Humaini
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Education Physics

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Sifat Optik Lapisan Tipis ZnO Aris Doyan; Humaini Humaini
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 3 No 1 (2017): Januari - Juni
Publisher : Department of Physics Education, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (533.552 KB) | DOI: 10.29303/jpft.v3i1.321

Abstract

The aim of this research is to manufacture and characterize optical properties of ZnO thin layer which is deposited on glass substrate by sol-gel spin-coating method, through the process of growing ZnO thin layer of zinc acetate dehydrate (ZnAc) precursor on glass substrate with spin speed 2000 rpm for 30 minutes on a spin coater plate. The growth of layers by the sol-gel method of spin-coating is determined by the length of time of spin rotation which is related to the thickness of the thin layer. The Samples on the substrate in anneling at 400 oC and 500 oC for 1.5 hours to obtain a thin layer of ZnO. The obtained layer was characterized by UV-Vis test to determine the optical properties of the coating which include absorbance, transmittance, and bandgap energy. UV-Vis testing states that, the higher concentration of ZnO solution then the layer looks increasingly not transparent so that the transmittance value is smaller, otherwise the absorbance value of the layer becomes higher. This is indicated by the results obtained, at 1 M molarity concentration obtained the value of transmittance (50. 40%), while at a concentration of 0.7 M obtained greater transmittance value (75.24%) at the same heating temperature 500 oC. The gap energy is a forbidden area where electrons are located between the valence bands filled by the electrons and the empty conduction bands of the electrons. With respect to the photon energy to excite the electrons, the annealing treatment will affect the magnitude of the gap energy. High annearance temperature obtained a smaller gap energy compared with lower anneling temperatures. The obtained energy gap of 2.1 eV at 400 °C annealing temperature is greater than 0.1 eV compared to the heating temperature of 500 oC at 2.0 eV.
KONFLIK SUNNI-SYIAH DI TIMUR TENGAH PERSPEKTIF GEOPOLITIK DAN DAMPAKNYA TERHADAP HUBUNGAN SUNNI-SYIAH DI INDONESIA Humaini Humaini
CMES (Center of Middle Eastern Studies) Vol 12, No 2 (2019)
Publisher : Arabic Literature Department

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/cmes.12.2.37890

Abstract

Since the Iranian Islamic Revolution in 1979, Sunni sentiments with Shia have been redistributed everywhere. Even though the Sunni-Shia sentiment is not the main source of conflict but political geography, which is related to borders and natural resources. Because, the Middle East is located in a strategic area so that it becomes a very important region in the global political map. Conflicts that are inseparable from Sunni-Shia sentiments in the Middle East include: Shiite Sunni conflict in the Gulf War, attacks on the commemoration of Ashura (Karbala Massacre), Shiite Sunni conflicts in Syria and Lebanon, and Shia Sunni conflicts in the Yemeni Civil War. This conflict has a huge impact on Shia Sunni relations in Indonesia. The impact of the conflict was the occurrence of Sunni Shia conflict in Indonesia, which included: the attack on the Shia Islamic Boarding School, the dissolution of the commemoration of the Ashura tradition, the dissolution of the anniversary of Fatimah Az-Zahra, the ban on the Rausyan Fikr Foundation in Yogyakarta, and the attack on the Shia community in Madura. This paper attempts to examine the impact of the Shia Sunni conflict from a Geopolitical perspective and the impact of the conflict on Sunni- Shia relations in Indonesia.
Co-Authors Aris Doyan