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All Journal Jurnal Pendidikan Fisika dan Teknologi AMPLITUDO: Journal of Science & Technology Innovation Indonesian Journal of Innovation in Education Research
Martiana, Rina
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Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Education Energy Languange, Linguistic, Communication & Media Mathematics Physics Other

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Synthesis of TiO2 Thin Film with Cobalt Doping Using Sol-Gel Spin-Coating Technique as a Solar Cell Material Satipa, Denda Anung; Harpani, Baiq Fara Audy; Sani, Hadijah Mutiara; Wati, Eka Prasetia; Martiana, Rina; Rizaldi, Dedi Riyan; Doyan, Aris; Susilawati, Susilawati; Fatimah, Ziadatul
AMPLITUDO : Journal of Science and Technology Innovation Vol. 3 No. 2 (2024): August
Publisher : Balai Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56566/amplitudo.v3i2.162

Abstract

Research has been done on thin films by mixing TiO2 with cobalt doping and adding HCI as a solar cell material. The aim of this research is to produce a thin layer that is good for use in solar cells. This research has several stages, namely: 1) weighing cobalt and titanium; 2) glass substrate preparation; 3) making a sol-gel solution; 4) thin layer deposition; and 5) heating the sample. From these several stages, the result was that a pure TiO2 solution without doping obtained a thick white solution, whereas the more doping used, the fainter the color of the solution obtained. The thin-layer synthesis process uses a spin-coating method assisted by a modified centrifuge to evenly distribute the sol-gel solution on the surface of the glass substrate
Exploration of Friction Material on Weaving Crafts in Sukarara Village, Central Lombok, NTB Osi, Zaena Sultona; Maharani, Bintang; Martiana, Rina; Purnama, Dunia; Mahrus, Mahrus; Andayani, Yayuk
Indonesian Journal of Innovation in Education Research Vol. 1 No. 2 (2025): July
Publisher : Yayasan Arfah Bin Haji Muhammad Saleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63980/ijier.v1i2.75

Abstract

This study aims to determine and explore the relationship between friction and weaving crafts in Sukarara Village, Central Lombok, NTB. Ecotourism is the main focus, especially on weaving crafts in the Sasak tribe as an attraction for tourists. The delivery process carried out manually by the community involves interaction between yarn and looms, where friction plays an important role in the quality of the fabric produced. Through a qualitative approach, data were obtained from interviews with weavers and local communities, as well as direct observation. The results of the study indicate that the community's understanding of the principles of physics, especially friction, is manifested in their telling practices. Various factors, including yarn type, ordering technique, and weaver skills, affect friction and fabric quality. This study links traditional knowledge with scientific concepts, providing new insights into the application of physics in everyday life and the importance of preserving local culture
The Effect of Adding Ketapang Fruit Ash on the Physical and Mechanical Properties of Geopolymer Concrete Based on High-Calcium Fly Ash Type C with Alkali Activator Martiana, Rina; Liza, Sofia Afsa; Wani, Candra; Hilmayati, Sri; Astuti, Alpiana Puji; 'Ardhuha, Jannatin
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 10 No 2 (2024): July - December
Publisher : Department of Physics Education, Universitas Mataram

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Abstract

This study aims to analyze the effect of adding ketapang fruit ash on the physical and mechanical properties of geopolymer concrete based on high-calcium fly ash type C with an alkali activator. The research methods included chemical composition analysis of fly ash using X-Ray Fluorescence (XRF) and the preparation of concrete samples with varying concentrations of ketapang fruit ash (1%, 1.6%, 2.3%) and water content (3.6%, 3.0%, 2.3%), as well as curing durations (7, 14, and 28 days). The XRF analysis results revealed that fly ash from the Jeranjang Power Plant belongs to Class C, with major components being SiO₂ (34.8%), Fe₂O₃ (23.7%), CaO (23.0%), and Al₂O₃ (11.0%). Physical property tests indicated that the mass of concrete types I, II, and III remained relatively stable at 7, 14, and 28 days, although a slight decrease in mass was observed for concrete type I after curing, with a final mass of 6.8 kg. This decrease was attributed to environmental factors, composition, and rapid water evaporation. Mechanical property tests demonstrated a significant increase in compressive strength across all concrete samples as the concentration of ketapang fruit ash increased. The highest compressive strength was achieved by concrete type III with a ketapang fruit ash concentration of 2.3%, reaching 200 MPa at 7 days, 225 MPa at 14 days, and 270 MPa at 28 days. Furthermore, the addition of ketapang fruit ash improved the concrete's resistance to water penetration. These results suggest that incorporating ketapang fruit ash is an effective alternative for enhancing the quality of geopolymer concrete for structural applications.
Co-Authors 'Ardhuha, Jannatin Aris Doyan Astuti, Alpiana Puji Dedi Riyan Rizaldi Fatimah, Ziadatul Harpani, Baiq Fara Audy Hilmayati, Sri Liza, Sofia Afsa Maharani, Bintang Mahrus Mahrus, Mahrus Osi, Zaena Sultona Purnama, Dunia Sani, Hadijah Mutiara Satipa, Denda Anung Susilawati, Susilawati Wani, Candra Wati, Eka Prasetia Yayuk Andayani