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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) ORBITA: Jurnal Pendidikan dan Ilmu Fisika Jurnal Arsitektur Journal of Science and Science Education (JoSSEd) MANDALIKA: Journal of Social Sciences International Journal of Science Education and Science
Muliyadi, Lalu
Universitas Mataram
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Neuroscience Physics

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SINTESIS PAPAN KOMPOSIT BERBAHAN DASAR SERAT SABUT KELAPA DAN SERAT BUAH KETAPANG DENGAN MATRIK PVAc Susilawati Susilawati; Aris Doyan; Kosim Kosim; Napaani Syafaati; Lalu Muliyadi
ORBITA: Jurnal Kajian, Inovasi dan Aplikasi Pendidikan Fisika Vol 6, No 2 (2020): November
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (311.237 KB) | DOI: 10.31764/orbita.v6i2.2770

Abstract

ABSTRAKSintesis komposit mengggunakan campuran serat sabut kelapa  dan serat buah ketapang  dengan matrik Polyvinil Acetat (PVAc) telah berhasil dilakukan. Sampel tersebut dibuat dengan variasi komposisi fraksi volume serat sabut kelapa dan serat buah ketapang yaitu (0:100), (30:70), (40:60), (50:50), (60:40), (70:30) dan (100:0)%. Perbandingan fraksi volume campuran serat alami dan matrik polyvinyl Acetat (PVAc) yang dibuat yaitu (70:30)%. Pembuatan sampel diawali dengan pengambilan serat sabut kelapa dan buah ketapang, penjemuran dan pemotongan, kemudian pencampuran serat sabut kelapa dan serat buah ketapang dengan matriks PVAc, pencetakan komposit dengan alat cetak tekan dan penjemuran. Sampel yang sudah jadi selanjutnya diuji fisiknya dengan cara menentukan nilai massa jenis dan kadar air sampel  untuk melihat kualitas sampel. Hasil penelitian menunjukan bahwa secara keseluruhan sampel telihat homogen, massa jenis sampel berkisar antara 0,52- 0,72 gram/cm3 dan nilai kadar air berkisar antara 10,05- 12,89%. Hal ini berarti bahwa sampel komposit telah memenuhi kriteria SNI 03-02105-2006 dan termasuk pada katagori berkerapatan sedang. Kata kunci: komposit; serat sabut kelapa; serat buah ketapang; PVAc. ABSTRACTSynthesis using a mixture of Coconut coir fiber and Terminalia catappa fruit fiber with the Polyvinyl Acetate (PVAc) matrix has been successfully carried out. The samples were made with variations in the composition of the volume fraction of Coconut coir fiber and Terminalia catappa fruit fiber, namely (0: 100), (30:70), (40:60), (50:50), (60:40), (70:30) ) and (100: 0)%. The ratio of the volume fraction of the mixture of natural fibers and the polyvinyl acetate (PVAc) matrix made was (70:30)%. The sample production begins with taking Coconut coir and Terminalia catappa fruit, drying and cutting, then mixing coconut coir and Terminalia catappa fruit fiber with a PVAc matrix, molding the composites using a press printing tool and drying. The finished sample is then physically tested by determining the density value and moisture content of the sample to see the quality of the sample. The results showed that the overall sample looked homogeneous, the density of the sample ranged from 0.52 to 0.72 grams/cm3 and the moisture content ranged from 10.05 to 12.89%. This means that the composite sample has met the SNI 03-02105-2006 criteria and is included in the medium density category. Keywords: composite; coconut coir fiber; terminalia catappa fruit fiber; PVAc.
Synthesis Thin Films SnO2 with Doping Indium by Sol-gel Spin coating Syamsul Hakim; Aris Doyan; Susilawati Susilawati; Lalu Muliyadi
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.v5i2.254

Abstract

Abstract:This research is an experimental study that aims to support the temperature and variation of doping in making thin films. The temperature variations at room temperature annealing, 50, 100, 150, and 200oC, and doping variations of 0, 5, 10, 15, 20, and 25%. The method used in this study is sol-gel spin coating. The results showed that thin films at low temperatures were more transparent than higher temperatures and the increase percentage doping causing thin films to be more transparent. Keywords:Thin Films; SnO2; Indium, Sol-gel, Spin Coating.
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
Analysis of Validation Development Learning Model Attainment Concept to Improve Critical Thinking Skills and Student Learning Outcomes Kartini Kartini; Aris Doyan; Kosim Kosim; Susilawati Susilawati; Baiq Uswatul Khasanah; Syamsul Hakim; Lalu Muliyadi
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.v5i2.262

Abstract

Abstract: This study aims to produce a product in the form of a science learning model for the acquisition of motion material concepts in valid objects, with the development path using a 4D model consisting of 4 stages of development namely define, design, develop, and disseminate. Learning tools developed are syllabus, Lesson Plain, SAS and tests of critical thinking skills and student learning outcomes. However, at this writing focused on the process of validation testing through validation tests on the development of devices made. The final result of this study is to produce valid learning development products. Keywords: Learning Devices, Validation
Growth of Tin Oxide Thin Film by Aluminum and Fluorine Doping Using Spin Coating Sol-Gel Techniques Susilawati Susilawati; Aris Doyan; Lalu Muliyadi; Syamsul Hakim
Jurnal Penelitian Pendidikan IPA Vol. 6 No. 1 (2020): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v6i1.264

Abstract

Abstract: The growth of tin oxide thin film by Aluminum doping and Fluorine has been carried out with the sol-gel spin coating technique. The growth aims to determine the quality of the thin layer formed based on variations in doping aluminum and fluorine. The basic ingredients used were SnCl2.2H2O, while the doping materials used were Al (Aluminium) and F (Fluorine) with variations in dopant concentrations (0, 5, 10, 15, 20 and 25)%. The growth of a thin layer using measured glass (10x10x 3) mm as a substrate. The growth of thin films includes substrate preparation, sol-gel making, thin film making, and heating processes. The growth of thin layer was dripped on a glass substrate with sol-gel spin coating technique at 1 M sol concentration and treated with maturation for 24 hours. The next step is making a thin layer using a spin coater at a speed of 2000 rpm for 3 minutes. After that, the substrate is heated in an oven at 100°C for 60 minutes. The results showed that the transparency level of the tin oxide layer increases with increasing amounts of doping Aluminum and fluorine. Key words: Aluminum, Fluorine, Sol-gel, Spin Coating, Thin Film, Tin Oxide
Analysis Validation of Learning Media Quantum Phenomenon Baiq Uswatul Khasanah; Aris Doyan; Gunawan Gunawan; Susilawati Susilawati; Kartini Kartini; Syamsul Hakim; Lalu Muliyadi
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.v5i2.265

Abstract

Abstract: This study aims to produce learning media in high school grade XII science quantum phenomenon material. This research is development research that uses the research and development model of Borg and Gall with ten stages, but in this study only followed until the fifth step. Data from development research results in the form of a percentage of the validity of learning media from the validation sheet in the form of responses and suggestions obtained from the test results by material experts and media experts. This learning media is supported by a syllabus, learning implementation plans, and student worksheets as well as instruments for understanding students' concepts and critical thinking skills. The focus of this research is the validity test by material experts, media experts on the media developed. The results of the learning media validation from the test subjects were declared appropriate for use. Keywords: Learning Media; Quantum Phenomenon; Validation
Synthesis of M-Hexaferrites Material Based on Natural Iron Sand with Metal Co Doping Using the Coprecipitation Method Susilawati Susilawati; Aris Doyan; Lalu Muliyadi
Jurnal Penelitian Pendidikan IPA Vol. 7 No. 1 (2021): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v7i1.461

Abstract

The synthesis of M-hexaferrite with metal doping Co (BaFe12-3xCoxO19 ) based on natural iron sand at Ketapang beach in Pringgabaya Subdistrict, East Lombok using the coprecipitation method has been successful. The basic ingredients used in this study were natural iron sand and BariumCarbonate (BaCO3) powder, while the doping material used was Cobalt (II) Chloride Hexahydrate (CoCl2.6H2O) powder with a variety of mole fraction (X = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0). The solvent uses 37% hydrochloric acid (HCl), 25% NH4OH solution, and distilled water. The sample formed was then calcined at 200 0C, 400 0C, 600 0C, 800 0C and 1000 0C. The resulting sample shows that there is an effect of Co doping and calcination temperature in the formation of barium M-hexaferrite. The higher the mole fraction of Co doping ions and the calcination temperature, the darker the color of the powder produced. 
Synthesis of Tin Oxide Thin Layer by Doping Aluminum, Fluorine, and Indium Using Sol-Gel Spin Coating Technique Aris Doyan; Susilawati Susilawati; Lalu Muliyadi
Jurnal Penelitian Pendidikan IPA Vol. 7 No. 1 (2021): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v7i1.468

Abstract

The synthesis of tin oxide thin films with doping aluminum, fluorine, and indium (SnO2: Al + F + In) by sol-gel spin coating technique has been successfully carried out. This synthesis aims to determine the quality of the thin film formed by adding doping aluminum, fluorine, and indium. The basic material used is SnCl2.2H2O, while the doping material used is AlCl3, NH4F, and InCl3.4H2O. The comparison of the basic ingredients and doping mixture of aluminum, fluorine and indium (SnO2: Al+F +In) used were 100: 0%, 95: 5%, 90: 10%, 85: 15%, 80: 20% and 75: 25%. The synthesis uses a glass substrate with size (10 x 10 x 3) mm. Coating synthesis includes substrate preparation, sol-gel making, film making, and sample heating. The layers that are made consist of 1 to 4 layers. The results showed that the layer formed had a high degree of transparency along with the increasing concentration of the doping material percentage. The higher the doping concentrations of aluminum, fluorine, and indium, the higher the transparency of the resulting layer. Besides, the greater the number of layers, the lower the transparency level of the layers
Synthesis and Characterization of SnO2 Thin Film Semiconductor for Electronic Device Applications Aris Doyan; Susilawati Susilawati; Kehkashan Alam; Lalu Muliyadi; Firdaus Ali; Mohd Mustafa Awang Kechik
Jurnal Penelitian Pendidikan IPA Vol. 7 No. SpecialIssue (2021): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v7iSpecialIssue.1270

Abstract

Synthesis and characterization of SnO2 thin films with various types of doping materials such as aluminum, fluorine and indium have been successfully carried out. This study aims to determine the effect of various types of doping materials on the quality of thin films such as the energy band gap produced. The results showed that the higher the doping concentration, the more transparent the layer formed. In addition, the optical properties of thin films such as band gap energy are affected by the applied doping. The direct and indirect values ​​of the largest band gap energy for the percentage of 95:5% are 3.62 eV and 3.92 eV are found in the SnO2: In thin layer. Meanwhile, the lowest direct and indirect values ​​of band gap energy are in the thin layer of SnO2:(Al+F+In) for a percentage of 85:15%, namely 3.41 eV and 3.55 eV. The greater the amount of doping given, the smaller the bandgap energy produced. In addition, the more combinations of doping mixtures (aluminum, fluorine, and indium) given, the smaller the bandgap energy produced. This shows that the quality of a thin film of SnO2 produced is influenced by the amount of concentration and the type of doping used
Effectiveness of Quantum Physics Learning Tools Using Blended Learning Models to Improve Critical Thinking and Generic Science Skills of Students Aris Doyan; Susilawati Susilawati; Saprizal Hadisaputra; Lalu Muliyadi
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 2 (2022): April
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i2.1625

Abstract

This study aims to determine the effectiveness of quantum physics learning tools using blended learning models to improve the critical thinking and generic science skills of students. The learning device was developed using a 4-D model which includes the stages of definition, design, development, and dissemination. Learning devices that have been declared valid then conducted a limited-scale trial in the Physics education undergraduate program at the University of Mataram, which consisted of thirty students. Analysis of increasing critical thinking and science generic skills using the n-gain (g) test. The results of the n-gain analysis for all aspects indicate that the student's critical thinking and generic science skills are in the medium and high categories. These results indicate that the use of quantum physics learning using a blended learning model is effective in improving students' critical thinking and generic science skills
Co-Authors Adhi Widyarthara Ahmad Hardjono Ahzan, Sukainil Ardianti, Nuraini Rachma Aris Doyan Aris Doyan Aris Doyan Aris Doyan Aris Doyan Aris Doyan Aris Doyan Bahtiar Bahtiar Baiq Uswatul Khasanah Baiq Uswatul Khasanah Christine P. Abo Fiki Rahmana Firdaus Ali Gummah, Sifaul Gunawan Gunawan Hakim, Syamsul Hamidi Hamidi Haris Munandar Hutabarat, Risnawati Agustin Ibrahim Ibrahim Januarti, Isna Mutia Joni Rokhmat Kartini Kartini Kehkashan Alam Kosim . Kosim Kosim Kosim Kosim Mohd Mustafa Awang Kechik Muhammad Ikhsan Napaani Syafaati Purwoko, Agus Abi RUTH RIZE PAAS MEGAHATI, RUTH RIZE PAAS Sandi Anggara Putra Saprizal Hadisaputra Susilawati Susilawati Susilawati - Susilawati, Susilawati Syamsul Hakim Syamsul Hakim Syamsul Hakim Syarful Annam