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Usman Malik
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Jurusan FMIPA Universitas Riau Kampus Bina Widya Km 12,5 Simpang Baru Pekanbaru
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INDONESIA
Komunikasi Fisika Indonesia
Published by Universitas Riau
ISSN : 14122960     EISSN : 2579521X     DOI : 10.31258/jkfi
Core Subject : Science, Engineering,
Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics
KFI mempublikasikan artikel hasil penelitian dan review pada bidang fisika, namun tidak terbatas, yang meliputi fisika murni, geofisika, plasma, optik dan fotonik, instrumentasi, dan elektronika, dan fisika terapan (aplikasi fisika).
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 390 Documents
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FTIR and Raman studies of manganese phosphate glasses Budi, Agus Setyo; Nasbey, Hadi; Sugihartono, Iwan
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.257-260

Abstract

Raman and infrared (IR) spectra of  xMn2O3(1-x)P2O5 glasses (x = 5 mol% – 25 mol%) are reported. The spectral shift is related to changes in the coordination of the neodymium ion. The changes observed are consistent with an elongation of P–O- terminal and P–O–P bridging bonds in the PO4 tetrahedra.
Harnessing multi-doping porous carbon from Musa paradisiaca L. peel waste for solid-state supercapacitors Purba, Cenora Evelynza; Nursyafni, Nursyafni; Apriwandi, Apriwandi; Kresna, Pharada; Julnaidi, Julnaidi; Nasir, Muhammad; Farma, Rakhmawati; Dewi, Rahmi; Martin, Awaludin; Hardanto, Lilik Tri; Taslim, Rika; Taer, Erman
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.187-196

Abstract

The demand for low-cost carbons with multi-doping in supercapacitors has led to a significant focus on utilizing biomass waste to produce activated carbons. The research successfully utilized Musa paradisiaca L. (MPL) peel as a porous carbon for solid-state supercapacitor. The process involved collecting banana peel waste, drying the peels using sunlight, pre-carbonization using a furnace, pH neutralization, drying, crushing carbon particles, and ensuring uniform particle size. Different concentrations of the catalytic ZnCl2 solution (300, 500, and 700 mmol/g) were selected to optimize physical and electrochemical properties. The resulting chemically activated MPL carbon powder was evaluated using SEM-EDS, XRD, and BET. MPL activated carbon with a 500 mmol/g solution of ZnCl2 was found to have optimal physical properties with a carbon percentage of 81.65%, oxygen 17.39%, phosphorus 0.42%, and boron 0.52%. Electrochemical properties were evaluated using dual-electrode system was exhibited the highest specific capacitance of 67 F/g. These findings demonstrate the potential of MPL peel waste as a high quality electrode for supercapaicor next-generation.
Manchester system brachytherapy simulation using EGSnrc Monte Carlo simulation Octavia, Shella Salsa; Sumaryada, Tony; Yani, Sitti
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.281-288

Abstract

One type of cervical cancer treatment is brachytherapy using the Manchester system. In this study, isodose curves were analyzed on tissue phantoms irradiated using several types of radioactive sources with the Manchester system using Monte Carlo simulation, EGSnrc. This study used a homogeneous tissue phantom with dimension 10 × 10 × 10 m3. The Manchester system uses 2 ovoid and 3 tandem containing radioactive sources placed inside the phantom. The resulting isodose curves were combined and analyzed using MATLAB-based VDOSE GUI. The results showed that the dose distribution for each type of radioactive source at the reference point had different values, namely Cobalt-60 had a dose distribution at reference point A of 15.08% with a dose distribution at reference point B of 0%, Cesium-137 was 13.37% and 0%, Iridium-192 was 13.27% and 0%. The use of radioactive source types can be adjusted to the actual location of cervical cancer.
Study of the structural, optical, and morphological properties of ZnO nanoparticle biosynthesis using betel leaf extract as a bioreductant Hamzah, Yanuar; Kartika, Nursiti Sari; Umar, Lazurdi
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.227-232

Abstract

The biosynthesis of zinc oxide nanoparticles (ZnO) is extensively studied because of its eco-friendly and simple method. Piper ornatum is abundant in Indonesia, and the phytochemical content of Piper ornatum leaves has the potential to be a reductor. The study aims to study the role of Piper ornatum in biosynthesis and the characteristics of the zinc oxide nanoparticles. The sample variations in this study were the volume of Piper ornatum and the precursor solution of zinc nitrate hexahydrate Zn(NO3)2·6H2O in proportions of 1:1, 1:5, and 1:10. Characterizations performed include UV-Vis spectroscopy, X-ray diffraction (XRD), scanning electron microscopy, energy dispersive X-ray spectroscope and blue methylene degradation test. UV-Vis spectroscopy of all samples showed peak absorption at the interval of 250 – 330 nm, which indicates that ZnO nanoparticles have already formed. The results of characterization using XRD indicated the degree of crystallinity of the ZnO nanoparticles is not perfect because the crystal field (100) or the highest diffraction peak has a very large full width at half maximum value of 0.8187°. Characterization results using SEM indicate an inhomogeneous morphology and the presence of zinc oxide nanoparticle agglomeration where particle size distribution is at an interval of 170 – 758 nm.
Synthesis and characterization of activated carbon based on young coconut fiber as a supercapacitor electrode Nasution, Dio Davana Firdaus; Awitdrus, Awitdrus
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.261-264

Abstract

Supercapacitor is energy storage devices consisting of electrodes, electrolyte, current collectors, and separator. In this research, carbon electrodes are made from young coconut fiber biomass (SKM) waste using ZnCl2 0.5 M as activation agent and variations in  physical activation temperatures. Carbon electrodes preparation begins with a pre-carbonized process of 200ºC temperatures for 1 hour and 30 minutes,  chemical activation using ZnCl2 0.5 M as activation agent, then the carbonization process uses N2 gas as well as physics activation using CO2 in temperature variation of 700ºC, 750ºC, and 800ºC. Analysis of the nature of electrodes cell capacitor based fiber young coconut fibers sample shows that the activation physics 750ºC sample is best, agreeble with the density of carbon electrodes declined by 40.43% after the carbonization-activation process. Carbon electrodes represent semicrystalline based on the characterization of the X-ray diffraction, marked with a ramp peak at 2θ at about 24º and 45º. The SKM-750 has a highest of Lc/La ratio an average number of microcrystalline inner layers (Np), are 0.9 and 3.55. SKM-750 has the highest of specific capacitance value, namely 245.45 F/g.
Areca-nut waste-derived carbon porous for sustainable electrode materials: A brief study for green-supercapacitor Nursyafni, Nursyafni; Julnaidi, Julnaidi; Taer, Erman
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.197-204

Abstract

Biomass-based porous carbon is an exceptional material with unique nano-morphological properties and a high surface area, making it an ideal candidate for improving the performance of supercapacitor electrodes. Herein, activated carbon derived novel areca-nut waste (ANW) as electrodes materials were successfully produced using a simple method. The process involved drying the ANW using pre-carbonization, chemical activation, and high-temperature pyrolysis. The zinc chloride was selected as chemical catalytic in 1 m/l solution. Subsequently, porous carbon was produced at different physical activation temperatures of 800°C, 850°C, and 900°C. The activated carbon was converted into coin-like design with an additional adhesive of PVA. The electrochemical properties were assessed using a two-electrode system in a 1 M H2SO4 electrolyte. The ANW-based supercapacitor demonstrated good electrochemical performance, with an optimal specific capacitance of 94.6 F/g at 850°C. Additionally, it exhibited an optimal energy density of 12.8 Wh/kg and a power density of 245.516 W/kg. These results suggest that porous carbon derived from ANW biomass holds promise as a sustainable working electrode for green-supercapacitor.
Analysis and modelling of the characteristics of telecommunication antennas utilising metamaterials with a circular structure Defrianto, Defrianto; Saktioto, Saktioto; Anita, Sofia; Zahroh, Siti; Soerbakti, Yan; Emrinaldi, Tengku
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.233-238

Abstract

The development of telecommunication antenna technology is increasingly being considered with the need for high and practical antenna performance. The antenna technology can be realized by using the split ring resonator (SRR) metamaterial structure. SRR metamaterial is a periodic material that has minimal manufacturing dimensions and is able to work at high frequencies. The ability of this metamaterial has the potential to be implemented in microstrip antenna structures as telecommunication applications. This study aims to design, simulate and analyze the characteristics of SRR-Circle metamaterials against the frequency function and application performance as a telecommunication antenna. The process is carried out using the Computer Simulation Technology (CST) Studio Suite Software which is operated at a working frequency of 0.009 – 9 GHz. The metamaterial structure is combined from 1 – 4 SRRs in the shape of a Circle with a fixed radius of 3.5 mm. The results of this study indicate the characteristics of metamaterials with negative values in relative permittivity (ɛᵣ), relative permeability (μᵣ) and refractive index (n) with the highest values in the metamaterial structure of the combination of 4 SRR-Circles, each with values of -144.33 Farad/m, -9.29 H/m and -9.07. In its application as a telecommunications antenna, metamaterials have succeeded in improving antenna performance. The highest antenna performance was obtained in the combination structure of 4 SRR-Circles with a return loss value of -34.37 dB, and a bandwidth of 1.00 GHz at a VSWR of 6.77 – 7.77 GHz. The results of this antenna performance have the potential to be applied to telecommunications antenna technology such as satellites, radars and 5G networks.
Interpretation of aquifer layers in peatland areas using the Wenner configuration geoelectric method in Rimba Panjang Village, Tambang District, Kampar Regency Firmansyah, Restu; Muhammad, Juandi
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.265-270

Abstract

Geoelectric is a geophysical method used to determine the geological conditions of the earth's subsurface based on the variations of rock resistivity value. Interpretation of the aquifer layer is carried out on 2 paths with a length of 300 meters each. The lithology of the study area consists of layers of clay, peat, clay, sand, coarse sandstone, dry gravel, mudstone, limestone, tufan sand to siltstone. According to the data processing results, it shows that the aquifer in Rimba Panjang Village is at a depth ranging from (12.8 – 24.9) meters below ground level with medium groundwater potential. Interpretation using Res2Dinv Software as well as geological maps of the surrounding area informed the subsurface conditions and the presence of groundwater aquifers of the study area. It was found that the resistivity interval of trajectory 1 are (164.341) Ωm, (709 – 1477) Ωm, to (1477 – 3075) Ωm while of trajectory 2 are (864 – 1642) Ωm, (1642 – 3118) Ωm, to (3118 – 5921) Ωm. It can be concluded that the deeper the soil layer, the higher the moisture content. Because the deeper the soil layer, the lower the maturity of the peat, so that the soil is able to hold more water.
Preparation and characterization of Cr-TiO2/α-Fe2O3 nanocomposite for methylene blue degradation Hadilala, Teguh P; Amiruddin, Erwin; Awaluddin, Amir; Setiadi, Rahmondia Nanda
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.205-210

Abstract

In this study, Cr-TiO2/α-Fe2O3 nanocomposite was prepared by the ball milling method, incorporating chromium, titanium dioxide (TiO2), and iron oxide (α-Fe2O3) nanoparticles extracted from Logas-Kuansing natural sand. The structural, magnetic, morphological, and optical properties of these nanocomposites were investigated using X-ray diffraction (XRD), vibrating sample magnetometer (VSM), scanning electron microscopy (SEM), and UV-Vis spectroscopy. XRD revealed that both the pure and chromium-added nanocomposites have a hexagonal structure, with a crystalline size reduction from 17.5 nm to 19.7, 19.5, and 19.4 nm for the pure and chromium-added samples with chromium concentrations of 0, 5, 10, and 15 wt.%, respectively. Magnetic properties were analyzed through hysteresis loops using VSM, revealing coercivity, saturation magnetization, and remanence magnetization in the ranges of 131 – 247 Oe, 0.80 – 0.54 emu/g, and 0.097 – 0.116 emu/g, respectively. SEM analysis confirmed that the particle shape and size are within the nanometer scale. The optical band gap, estimated using the Tauc relation, decreased from 1.93 eV for the pure nanocomposite to 1.74, 1.68, and 1.72 eV for 5, 10, and 15 wt.% chromium-added nanocomposites, respectively. This study suggests that the prepared Cr-TiO2/α-Fe2O3 nanocomposite exhibits promising physical properties as a catalyst for the degradation of methylene blue.
Enhancing rural teacher competence in Meranti Islands Regency high school basic physics practical curriculum Saktioto, Saktioto; Defrianto, Defrianto; Rini, Ari Sulistyo; Irawan, Dedi; Agrina, Agrina; Anita, Sofia; Soerbakti, Yan; Rabin, Mohammed Fisal
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.%p

Abstract

Teacher competency standards serve as benchmarks that can be utilised to assess the attributes deemed essential for professional competence in educators. Educators play a crucial and strategic role in the pursuit of national development objectives, particularly within the realm of education. However, the objective of education appears to be a reduction in competency standards at the conclusion of each academic year for specific subjects, particularly in the realm of science and Basic Physics. Consequently, this initiative seeks to inspire educators and students in secondary education to enhance their understanding of the educational process by engaging in the study of science, specifically Basic Physics, utilising appropriate tools and resources. The suggested mode of engagement involves the processes of instruction and education within secondary educational institutions across the Meranti Islands Regency, encompassing SMA, MAN, MTs, and SMP levels. This activity further offers insights into experiments and demonstration tools for educators in the realm of science and Basic Physics, facilitating a comprehension of concepts that range from simple to intricate natural phenomena through accessible demonstration media designed for practical application. In this manner, educators are anticipated to exhibit motivation and enthusiasm throughout the learning process, accompanied by a thorough and nuanced comprehension of the subject matter. To enhance teacher competency standards significantly, ensuring they become more qualified and professional.

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