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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA)
Aris Doyan
Master of Science Education Program, University of Mataram, Lombok, West Nusa Tenggara
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Physics

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Synthesis of SnO2 Thin Layer with a Doping Fluorine by Sol-Gel Spin Coating Method Lalu Muliyadi; Aris Doyan; Susilawati Susilawati; Syamsul Hakim
Jurnal Penelitian Pendidikan IPA Vol. 5 No. 2 (2019): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v5i2.257

Abstract

A thin layer of tin oxide with doping Fluorine was synthesized using the sol-gel spin coating method. The synthesis aims to determine the quality of thin layers formed based on temperature variations and the number of layers. The basic material used is SnCl2.2H2O, while the doping material used is NH4F with variations in concentrations of dopants 0, 5, 10, 15, 20 and 25%. The substrate used is glass with a size of 10 x 10 x 3 mm. The synthesis of the thin layer includes substrate preparation, sol-gel making, thin film making, and heating process. At this stage SnO2:F is deposited on a glass substrate with sol-gel spin coating technique at the concentration of sol 1 M with doping levels of Fluorine 0, 5, 10, 15, 20 and 25%, and treated with maturation for 24 hours. Making a thin layer using a spin coater at a speed of 2000 rpm for 3 minutes. The layer made consists of one layer, two layers, three layers and four layers. The resulting layer shows that the higher the doping percentage, the higher the transparency of the layer. In addition, the more the number of layers, the lower the transparency level. Keywords: Thin Film, Tin Oxide, Fluorine, Sol-gel, Spin Coating
Teacher Basic Skills in Learning Science in Junior High Schools Facing the 21st Century Muhlis H. Usman; Agil Al Idrus; Aris Doyan; Harry Soeprianto; Aliefman Hakim
Jurnal Penelitian Pendidikan IPA Vol. 7 No. 3 (2021): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v7i3.652

Abstract

This study aims to determine the level of teacher skills in science learning in junior high schools facing the 21st century, especially the basic teaching skills of teachers. The research examined consisted of two types of data, namely qualitative and quantitative from the eight basic skills of teachers. The qualitative and quantitative data were interpreted and obtained information from the group discussion forums. The results show that the level of basic teaching skills for science teachers in Mataram City Junior High School is 33.4% very good, 60% in a good position, 6.6% at a sufficient level. Meanwhile, of the eight basic teaching skills of science teachers, the skills to open lessons and various teaching skills for junior high school science teachers in Mataram have very good skills, while explaining skills are still lacking, and basic teaching skills in very good categories are found in junior high school science teachers who are senior or already occupying a position. Coach level IV/a and above.
Co-Authors Agil Al Idrus Aliefman Hakim Harry Soeprianto Muhlis Muhlis Muliyadi, Lalu Syamsul Hakim