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All Journal Jurnal Sains dan Teknologi Journal of Teaching and Learning Physics Jurnal Riset Fisika Edukasi dan Sains PALAPA: Jurnal Studi Keislaman dan Ilmu Pendidikan Jurnal Penelitian Pendidikan IPA (JPPIPA) MANAZHIM Islamika: Jurnal Keislaman dan Ilmu Pendidikan Jurnal Penelitian dan Pengkajian Ilmu Pendidikan: e-Saintika Jurnal Pendidikan dan Konseling Lensa : Jurnal Kependidikan Fisika Sainstek : Jurnal Sains dan Teknologi Jurnal Pendidikan dan Kewirausahaan al-fikrah: Jurnal Manajemen Pendidikan Lensa: Jurnal Kependidikan Fisika
Marjoni Imamora Ali Umar
Universitas Islam Negeri Mahmud Yunus Batusangkar, Indonesia
Religion Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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EFEK KONSENTRASI Cu PADA STRUKTUR DAN SIFAT HANTARAN LISTRIK NANOPARTIKEL CuPt Imamora, Marjoni; R, Setia Erlila; Rahmi, Elvy; Maiyena, Sri; Umar, Akrajas Ali
Sainstek : Jurnal Sains dan Teknologi Vol 7, No 1 (2015)
Publisher : IAIN Batusangkar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (492.139 KB) | DOI: 10.31958/js.v7i1.128

Abstract

The investigation of bimetallic CuPt Nanoparticles (CuPt NPs) with average diameters in the 196.7±98 nm range have been prepared by the Liquid phase deposition methods and synthesized directly on an indium tin oxide (ITO) substrate. CuPt NPs with  high surface defect grown on (ITO) surface were prepared via a simple immersion of the substrate into a solution contains 1 mM Potassium Hexachloro Platinate (K2PtCl6), 0.2 mM Anhydrous Copper (II) Sulfate (CuSO4) anhydrous, 0.01 M Sodium dodecyl sulfate (SDS) and 10 mM Formic acid for 4 h at room temperature. The modification of Cu2+ ion precursor play a role to determine the nanoparticles geometry obtained. The simultaneous reduction of metal ions leads to either a surface enriched with one component or an alloy type of structure depending on the bimetal composition. The bimetallic CuPt NPs dispersions are characterized by FESEM, EDX Mapping, XRD, HRTEM and XPS analysis.Key words: CuPt, Liquid phase deposition, Bimetallic CuPt NPs
PENERAPAN METODE GALLERY WALK TERHADAP PEMBENTUKAN SIKAP DAN KEAKTIFAN SANTRI PONDOK PESANTREN DARUSSALAM SITIUNG 1 KAB. DHARMASRAYA Ronoili, Ronoili; Imamora, Marjoni; Lizelwati, Novia
Sainstek : Jurnal Sains dan Teknologi Vol 11, No 2 (2019)
Publisher : IAIN Batusangkar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (485.614 KB) | DOI: 10.31958/js.v11i2.1832

Abstract

This study aims to see the effect of the gallery walk method application to the attitudes and activeness of the students. The research data was obtained through quasi-experimental research by using randomized subjects posttest only controlled group design. This research was conducted at VIII grade students of MTsS Darussalam Sitiung 1 Islamic Boarding School Dharmasraya Regency which consisted of 2 classes with a population of 50 students. Samples were selected by simple total sampling technique, where the experimental and the controlled class were selected by lotting method. Data collection was carried out using observation and data analysis techniques through statistical tests consisting of normality, homogeneity and hypothesis tests with a significance level of 5%. Data from the hypothesis using the t test shows that the tcounted for the formation of attitudes, and activeness is 3.21 and 2.16, respectively with v = 48. Based on these values it is known that tcounted> ttable for the attitudes and activeness of students, namely (3.21> 1.677), and ( 2.16> 1,677) at the 5% significance level. Thus the hypothesis Ho is rejected and H1 is accepted, where the formation of the attitudes and activeness of students using the gallery walk method is better than using conventional learning with a certainty of 95%.
PENGEMBANGAN ALAT PRAKTIKUM GERAK JATUH BEBAS MENGGUNAKAN SENSOR PHOTOTRANSISTOR UNTUK PEMBELAJARAN FISIKA PADA MATERI GERAK JATUH BEBAS Maiyena, Sri; Imamora, Marjoni; Ningsih, Fitri
Sainstek : Jurnal Sains dan Teknologi Vol 9, No 1 (2017)
Publisher : IAIN Batusangkar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (487.35 KB) | DOI: 10.31958/js.v9i1.750

Abstract

This study aims to produce free fall practicum tools by utilizing phototransistor sensors to record the travel time of objects that fall from the starting point to the end point. Dealing with free falling equipment (GJB), equipment in schools is generally still very simple that is using a stopwatch. This type of research is a research and development using 4-d model (define, design, develop and disseminate), which is limited to the stage of development to practicalization activities. Data were collected through validation and responses toward  administered questionnaires.  Data analysis were conducted by analyzing validation sheet and quantitative response questionnaire by finding percentage of each item on the validation sheet. Then the data validation results are analyzed by descriptive technique to describe the quality of the developed product. The result of calibration of free fall practicum by using phototransistor sensor at 40 cm, 50 cm, and 70 cm distance obtained the average travel time of each object is 0.28 s, 0.32 s, and 0.37 s. These results indicate that the practicum tool has been calibrated. Validation of practicum tool is 72,39% and validation of questionnaire response of practican is 75%, indicating tool categorized valid. Furthermore, this tool is tested in class X.MIA and XI.MIA MAN 3 Payakumbuh which consisted 23 students in the science laboratory of MAN 3 Payakumbuh with the questionnaire response practicality are 87.75% and 84.41% respectively which are categorized very practical.
Kerakterisasi ZnO Nanorod Yang Disintesis Secara Hydrothermal Dengan Berbagai Konsentrasi Sebagai Nanogenerator Ali Umar, Marjoni Imamora
Jurnal Riset Fisika Edukasi dan Sains Vol 7, No 1 (2020): Jurnal Riset Fisika Edukasi dan Sains
Publisher : Universitas PGRI Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (12.547 KB) | DOI: 10.22202/jrfes.2020.v7i1.4090

Abstract

Characterization of zinc oxide (ZnO) nanorod as a nanogenerator synthesized using a hydrothermal method with various concentrations of a growing solution is reported in this article. The concentrations of the ZnO nanorod growing solution used were 0.02, 0.03, 0.04., 0.05, and 0.06M (denoted as Kp0.02, Kp0.03, Kp0.04, Kp0.05, and Kp0.06). The nanogenerator characterization was carried out using AFM Tip conduction (Scanning Probe Microscope in CPII / Veeco). The characterization of ZnO nanorod as a nanogenerator is discussed because it has piezoelectric properties caused by the flexing carried out on the nanorod. The resulting voltage is influenced by the morphology of the ZnO nanorod film, especially the diameter and density of the nanorod. The voltage surge increase with the concentration of growth solution increased. The highest voltage surge produced was 3.33 mV in the Kp0.04 sample.
SYNTHESIS AND CHARACTERIZATION OF TIO2 SEMICONDUCTOR DOPED BY AGNO3 AND THEIR APPLICATION AS PHOTOANODE IN DYE-SENSITIZED SOLAR CELLS Ali Umar, Marjoni Imamora; Faizil, Nanda; Umar, Akrajas Ali; Saad, Siti Khatijah Md
Lensa: Jurnal Kependidikan Fisika Vol 8, No 1: June 2020 (in Press)
Publisher : IKIP Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v8i1.2728

Abstract

The use of Titanium dioxide (TiO2) semiconductors in Dye-Sensitized Solar Cells (DSSC) devices have been extensively studied and synthesized with various techniques to obtain optimal performance. The TiO2 semiconductors with optimal performance are influenced by the growth method, the time of growth, the shape of the microstructure, and the optical properties. In this study, it was reported about the effect of silver nanoparticles (AgNO3) doping onto TiO2 semiconductors on their microstructure, reflectance, and efficiency of the DSSC device. The synthesis of TiO2 was carried out using liquid phase deposition (LPD) and immersed into an AgNO3 solution with a variation of time namely 0.5 h, 1 h, 2 h, 4 h, and 6 h. The entire TiO2 + AgNO3 sample, then used as a photoanode on DSSC with plastisol as a counter electrode. Characterization of microstructure, reflectance, and DSSC performance was carried out by using field emission scanning electron microscopy (FESEM), Uv-Vis Spectrophotometer, and Gamry Instrument, respectively. The FESEM results show that AgNO3 has successfully grown on the ITO substrate in a spherical shape with an average particle diameter ranging from 1.52-2.29 ?m. From observations using the Uv-Vis Spectrophotometer, obtained the energy band gap values ranged from 0.22 to 2.27 eV. The best results of DSSC device efficiency, with TiO2+AgNO3/Dye/Plastisol structure, have resulted in the Voc of 0.694 V, current density (Jsc) of 0,943 mA/cm2and fill factor (FF) of 43,50% which is obtained at sample 1.
GRAPHENE-AU FILM SYNTHESIZED FROM GRO IN AU-AQUAEUS SOLUTION AS COUNTER ELECTRODE FOR DSSC APPLICATION Umar, Marjoni Imamora Ali
Lensa: Jurnal Kependidikan Fisika Vol 7, No 2: December 2019
Publisher : IKIP Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v7i2.2644

Abstract

The study on the optical, electrical properties of multilayer graphene (MLG) obtained by thermal-reduction of graphene oxide (GrO) which was synthesized directly by mixing graphite oxide (GO) flake in 0.005, 0.01, 0.015, and 0.02 M of Au aqueous solution has been successfully performed. The resultant  GrO was subjected to an annealing temperature of 200°C, 400°C, 500°C for 1h to obtain MLG, and G-Au2x, G-Au4x, and G-Au5x (x=.0.005, 0.01, 0.015, and 0.02). The resultant samples were then characterized using FESEM, UV-VIS, four-point probe measurements to study its morphology, optical, and electrical properties. The transmission G-Au increase and its sheet resistant decrease as an increase of annealing temperature. Besides, the annealing treatment was then achieved of its microstructure which is expected may be used as a counter electrode in solar cell applications. The best DSSC devices with Quartz/FTO/ZnO Nanorods/Dye/G-Au50.01/Quartz structures have resulted in current-density, Voc, and solar cell performance of 0.1 mA/cm2, 0.42 V, and 0.01%, respectively.
Efek Variasi Waktu Penumbuhan Secara Hidrotermal Terhadap Keteraturan Nanorod Zink Oksida Marjoni Imamora Ali Umar
Jurnal Sains dan Teknologi Vol 19, No 1 (2020): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (482.879 KB) | DOI: 10.31258/jst.v19.n1.p1-6

Abstract

dihasilkan dilaporkan dalam artikel ini. Konsentrasi larutan penumbuh ZnO Nanorod yang digunakan adalah 0.04M Zn (NO)3.H2O pada suhu 90°C.  Waktu penumbuhan ZnO nanorod dilakukan dengan 5 variasi waktu yaitu 0.5 h, 1h, 2h, 4, dan 8h yang dilambangkan dengan T0.5, T1.0, T2.0, T4.0, dan T8.0. Sampel yang dihasilkan dikarakterisasi dengan field emmisision scanning electron microscopy (FESEM), dan X-ray diffraction (XRD) yang masing-masing untuk melihat morfologi dan struktur ZnO nanorod yang dihasilkan. Data FESEM menunjukkan bahwa umumnya diameter dan ketinggian meningkat dengan peningkatan waktu penumbuhan. Disamping itu, keteraturan nanorod juga semakin baik seiring penambahan waktu penumbuhan. Keteraturan ZnO nanorod yang paling baik terbentuk pada waktu penumbuhan T1.0 dengan persentase rata-rata kecondongan nanorod yang terjadi adalah 6.0 ± 1.0 %.  Sementara itu, sample T2.0-T8.0 menunjukkan rod yang terbentuk sudah mulai melebihi 100 nm sehingga tidak dapat digolongkan ke dalam ZnO nanorod. Aplikasi ZnO nanorod dengan variasi waktu penumbuhan ini sebagai nanogenerator dan fotoanod dalam piranti dye sensitized solar cell juga dibahas dalam artikel ini.
Pengembangan Modul Elektronik Fisika Berbasis Konstruktivisme untuk Kelas X SMA Sri Maiyena; Marjoni Imamora
Journal of Teaching and Learning Physics Vol 5, No 1 (2020): Journal of Teaching and Learning Physics (February 2020)
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jotalp.v5i1.5739

Abstract

Abstractlimitations on the hard module and the lack of availability of technology-based learning media led to a lack of student motivation in learning physics. As a result, it is necessary to develop a constructivism-based electronic physics module. The objective of this research is to know the validity of constructivism-based electronic physics module for 1st student in Senior high school. This research is research and development research. Feasibility tests of the electronic module are carried out through the validation. Validation was carried out by three validators. Based on validation, it showed that constructivism-based electronic physics module that was developed is very valid with a percentage of 89.08%.AbstrakKeterbatasan pada modul cetak serta kurangnya ketersediaan media pembelajaran yang berbasis teknologi menyebabkan kurangnya motivasi siswa dalam mempelajari fisika. Untuk itu perlu dikembangkan sebuah Modul Elektronik fisika berbasis konstruktivisme. Penelitian ini bertujuan untuk menghasilkan Modul Elektronik Fisika yang valid untuk siswa Kelas X SMA. Penelitian ini adalah penelitian pengembangan (research development) dengan menggunakan model 4-D. Pada tahap develop dilakukan pengembangan modul dengan divalidasi oleh 3 orang validator. Berdasarkan hasil validasi terhadap modul elektronik fisika berbasis konstruktivisme yang dikembangkan adalah sangat valid dengan persentase 89,08%.
The Liquid Phase Deposition of ZnPtBNs: Study on Structural, Morphology, and Their Sheet-Resistant Marjoni Imamora Ali Umar; Mardiani Mardiani; Elvy Rahmi Mawarnis; Akrajas Ali Umar
Jurnal Penelitian dan Pengkajian Ilmu Pendidikan: e-Saintika Vol. 5 No. 2: July 2021
Publisher : Lembaga Penelitian dan Pemberdayaan Masyarakat (LITPAM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/esaintika.v5i2.497

Abstract

This paper reports ZnPt bimetallic nanoparticles (ZnPtBNs) synthesis through the liquid phase deposition (LPD) of of Zn(NO3)2.6H2O onto the indium-titanium oxide (ITO) substrates at various concentrations. The Effects of growth solution, the morphology, structural, and sheet resistance were studied. After preparation, the materials were characterized by using field emission electron microscopy (FESEM), energy dispersive X-ray (EDX), X-ray diffraction (XRD) and Four Point Probe (FPP) measurement by using Keithley 2401 source-meter. By inserting a growth solution into the ITO substrate the ZnPtBNs was successfully in-situ prepared. The synthesized ZnPtBNs exhibited homogeneous, fibrous at the (111) orientation with an average diameter of 100-700 nm. The atomic ratio of Zn:Pt and sheet resistance of ZnPtBNs decreased with the increase of Zn(NO3)2.6H2O concentration. The optimal elemental composition of the sample was at a ratio of Zn:Pt (1:25) obtained at 0.467 mM of Zn(NO3)2.6H2O. It showed the smallest sheet resistance (13.41 ?) which was 38% lower than the ITO sheet resistance (18.44 ?).
Fabrication of Digital Harmonic Vibration Practicum Using Phototransistor Sensor with Arduino-Uno Microcontroller Marjoni Imamora Ali Umar; Dany Kurniawan; Novia Lizelwati
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.v7i3.835

Abstract

The problem in the harmonic vibration practicum is in calculating time accurately. Commonly, the time counter used was a stopwatch, but it was unable to provide valid data. As a result, the student has difficulty seeing the relationship between concepts with practical results in the laboratory. To overcome these problems, in this study, we developed a harmonic vibration practicum tool that is equipped with a digital timer using an Arduino Uno microcontroller as a light sensor. An Arduino can be programmed via a PC according to the wishes of the developer. This study was development research using a 4-D model (Define-design-develop-dissemination). The define and design stages respectively to find problems in the harmonic vibration practicum tool. The tool is finally designed and then calibrated, validated, and practical. The calibration results show that the percentage difference for repetition measurement and comparison that values with theory was 0.008% and 3.98%, respectively. In addition, the validation results show an average percentage of 87% or very valid. For practicality, the result through a limited test of Physics students of IAIN Batusangkar in the second semester shows a very practical response with a percentage of 85.96%. Due to time constraints, the dissemination stages have not been carried out in this study.
Co-Authors Akrajas Ali Umar Akrajas Ali Umar Akrajas Ali Umar Almasri Almasri Dany Kurniawan Demina Demina Demina Demina Elvy Rahmi Elvy Rahmi Mawarnis Faizil, Nanda Fardilla Deviyanda Fitri Ningsih, Fitri Hasan Zaini Hasan Zaini Khairat, Annisaul Mardiani Mardiani Muhammad Fazis Muhammad Fazis Nanda Faizil Novia Lizelwati Novia Lizelwati R, Setia Erlila Rika Agusti Roby Setia Pramana Ronoili, Ronoili Saad, Siti Khatijah Md Siti Khatijah Md Saad Sri Maiyena Sri Maiyena Suswati Hendriani Wiwit Vianora Zulhendri Zulhendri Zulhendri Zulhendri