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All Journal Jurnal Teknosains Journal of Physics and Its Applications JRSI (Jurnal Rekayasa Sistem dan Industri)
Hilmi, Isom
Universitas Ahmad Dahlan, Indonesia
Astronomy Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Fabrication of pbs films for air mass filter of solar simulator Hilmi, Isom; Kusuma, Damar Yoga; Soetedjo, Hariyadi; Hidayah, Qonitatul; Salamah, Umi
Jurnal Teknosains Vol 13, No 2 (2024): June
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.88846

Abstract

The production of solar panels is continuously increasing due to increasing demands at industrial and residential levels. This also leads to an increasing demand for solar simulator testing tools. A solar simulator is a tool to assess a solar panel's performance in lab and industry scales. One of the main components of the solar simulator is the Air Mass Filter (AMF). The primary function of AMF is to remove unwanted wave bands from the solar simulator light source (e.g., Xe arc lamp) so that the filtered spectrum is commensurate to that of solar irradiation. An AMF can be produced by fabricating a thin material layer on a transparent substrate like glass. The film would absorb certain wave bands in different ways. This paper reports the fabrication of the chalcogenide PbS thin films for applying AMF. The thermal evaporation technique is used for the film fabrication. PbS is known for its versatility for applications in different optical devices due to its tailorable optical properties. Different amounts (in grams) of PbS source powders are used to deposit the PbS thin films. The optical properties of the films are then examined using UV-Vis spectroscopy. The distributions of the transmittance intensity of the Xe-arc-lamp light with and without the use of the films as an optical filter are then examined using a solar simulator. From the experiments, the film deposited using a 0.012 g PbS powder source is regarded as the optimum one regarding the transmittance intensity distribution.
Influence of annealing on the physical and optical properties of Ge thin films deposited using thermal evaporation Hilmi, Isom; Adam, Muhammad Kevin; Purwadi, Joko; Soesanto, Qidir Maulana Binu; Kusuma, Damar Yoga
Journal of Physics and Its Applications Vol 7, No 2 (2025): May 2025
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v7i2.24517

Abstract

Germanium (Ge) is extensively utilized in various technological applications, particularly in optoelectronic devices due to its favorable electronic properties. In this study, Ge thin films were deposited onto soda-lime glass substrates using the thermal evaporation technique. The deposited films were subsequently subjected to annealing at temperatures ranging from 200 to 700 °C. Comprehensive characterization of the films was performed using XRD to analyze crystallinity, UV-Vis spectroscopy to evaluate optical properties, and SEM to investigate surface topography. The annealing process induced a significant phase transformation from an amorphous state to a co-existing Ge and GeO2 structures, as evidenced by XRD measurements. This structural evolution was accompanied by notable changes in the optical properties of the films. Specifically, an increase in annealing temperature resulted in a higher absorbance in the longer wavelength regions of the UV-Vis spectrum. These findings highlight the possibility of a controlled manipulation on the structural and optical characteristics of Ge thin films by thermal treatment, with potential applications in optoelectronic devices.
Enhanced Quantum Wave function for Mathematical Modeling of Hydrogen and Helium Ionization Energies: Engineering Applications to Plasma Particle Formation Valentinus Galih Vidia Putra; Wiwiek Eka Mulyani; Isom Hilmi; Fadil Abdullah; Taufik Munandar; Markus Paramahasti
JRSI (Jurnal Rekayasa Sistem dan Industri) Vol. 12 No. 02 (2025): Jurnal Rekayasa Sistem & Industri
Publisher : Telkom University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jrsi.v12i02.9966

Abstract

Our research developed a computational model to calculate ionization energies of hydrogen and helium atoms through an enhanced variational method with a modified trial wave function in plasma generator. We implemented this approach in MATLAB v.7.12.0 (R2011a), incorporating key physical constants, such as reduced mass, Planck’s constant, and vacuum permittivity, within the framework of the time-independent Schrödinger equation. For hydrogen, a single-electron system, our model yielded an ionization energy of 13.6 eV, matching the established experimental value precisely. For helium, as we know, electron interactions complicate calculations; our optimized variational parameter estimated an ionization energy of approximately 32 eV, compared to the experimental value of about 25 eV, reflecting minor simplifications in our assumptions. This method proves reliable and computationally efficient, making it valuable for quantum-based plasma research, AI-integrated computational science, and studies of atomic-scale phenomena like corona plasma particle formation. Our comparative analysis confirms the variational technique’s accuracy, providing a strong foundation for advancing research in plasma physics and quantum mechanics
Post-Annealing Structural Evolution of Thermally Evaporated ZnO Thin Films with Emergence of Hydroxide-Related Phases Isom Hilmi; Muhammad Kevin Adam; Bagus Haryadi; Valentinus Galih Vidia Putra; Niar Gusnaniar; Damar Yoga Kusuma; Dhias Cahya Hakika; Markus Paramahasti
Journal of Physics and Its Applications Vol 8, No 3 (2026): August 2026
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v8i3.33562

Abstract

Zinc oxide (ZnO) and zinc hydroxide (Zn(OH)₂) are technologically important materials whose structural and optical properties make them attractive for applications in optoelectronics, catalysis, and energy-related devices. In this work, thin films derived from ZnO were fabricated using vacuum thermal evaporation followed by post-deposition annealing at temperatures between 400 and 600 °C. The influence of annealing temperature on the structural, optical, and morphological properties of the films was systematically investigated using X-ray diffraction (XRD), UV–Vis spectroscopy, and scanning electron microscopy (SEM). XRD analysis revealed that the film annealed at 400 °C exhibits a dominant diffraction peak corresponding to the (002) plane of hexagonal wurtzite ZnO, indicating predominant crystallization of the oxide phase. XRD analysis revealed the emergence of diffraction features attributable to hydroxide-containing zinc phases after annealing at 600 °C, accompanied by a substantial reduction in the intensity of characteristic ZnO reflections. Low-energy optical transitions derived from Tauc analysis shifted from approximately 2.75 to 2.00 eV with increasing annealing temperature. These values are interpreted as apparent optical transition energies rather than the intrinsic bandgap of crystalline ZnO or Zn(OH)₂. SEM observations further reveal a morphological transition from irregular grains to plate-like and flower-like hierarchical structures that are morphologically consistent with zinc hydroxide-containing systems. The appearance of hydroxide-related phases after high temperature treatment may be associated with post-annealing surface reactions taking place during ambient cooling. However, the underlying mechanism remains to be conclusively established.
A Modification of Surface Properties and Fabric Coloring Value of Polyester Fabrics with Plasma Wave Radiation Juan Priyanto; Valentinus Galih Vidia Putra; Wiwiek Eka Mulyani; Isom Hilmi; Fadil Abdullah
JRSI (Jurnal Rekayasa Sistem dan Industri) Vol. 13 No. 01 (2026): Jurnal Rekayasa Sistem & Industri
Publisher : Telkom University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jrsi.v13i01.9967

Abstract

The current study investigates the effect of the tip-cylinder electrode configuration of corona-discharged plasma treatment on coloring in the textile industry. This study aimed to examine the impact of plasma exposure treatment on the fabric surface as seen from the absorption time and the coloring value of the fabric. Corona discharge plasma used in this study was made by a tip-cylinder electrode configuration with a positive plasma type, while the fabric used was a 100% white polyester fabric, and the dyes used were red disperse dyes. The test results were carried out by testing the wet properties of the material, the FTIR test, and the spectrophotometer test. The results showed that this corona-discharged plasma could modify polyester fabric's surface properties and affect the fabric's coloring value. The novelty of this research is that we used plasma radiation for the first time to change the surface properties and fabric coloring of polyester fabric treated with corona plasma.
Co-Authors Adam, Muhammad Kevin Bagus Haryadi Damar Yoga Kusuma Dhias Cahya Hakika Fadil Abdullah Hariyadi Soetedjo Joko Purwadi Juan Priyanto Kusuma, Damar Yoga Markus Paramahasti Markus Paramahasti Muhammad Kevin Adam Niar Gusnaniar Qonitatul Hidayah Soesanto, Qidir Maulana Binu Taufik Munandar Umi Salamah Valentinus Galih Vidia Putra Valentinus Galih Vidia Putra Wiwiek Eka Mulyani