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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Spektra: Jurnal Fisika dan Aplikasinya
Putri, Hawinda Restu
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Pengembangan E-LKPD Terintegrasi Data BMKG dalam Pembelajaran Termodinamika Aufia, Yasrifa Fitri; Putri, Hawinda Restu; Sani, Nurma Mahendra; Putri, Bella Yunisah; Widayani; Triyanta
Jurnal Penelitian Pendidikan IPA Vol 11 No 9 (2025): September
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i8.11439

Abstract

This study aimed to develop an electronic student worksheet (E-LKPD) integrates real data from the Meteorology, Climatology, and Geophysics Agency (BMKG) for thermodynamics learning. The research employed the 4D development model (define, design, develop, and disseminate). At the define stage, the need for contextual learning media was identified, highlighting the importance of linking physics concepts with authentic climate data. The E-LKPD was designed with interactive and digital features to enhance student engagement. Validation by experts and teachers confirmed its validity and practicality. A classroom trial involving 35 students showed positive responses, improved conceptual understanding, and increased motivation. Observations further revealed that the integration of real climate data made physics learning more meaningful and engaging. In conclusion, the BMKG-based E-LKPD is a valid, practical, and effective learning resource that supports both conceptual mastery and student enthusiasm. Future research is recommended to examine its wider application in diverse classroom settings.
Optimasi Sistem MagnetoHydrodynamics (MHD) Sederhana untuk Aplikasi Aliran Fluida Putri, Hawinda Restu; Ratri, Bekti Afre; Kusumastuti, Nining; Khotimah, Siti Nurul
Jurnal Penelitian Pendidikan IPA Vol 11 No 5 (2025): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i5.10598

Abstract

Magnetohydrodynamics (MHD) studies the relationship between electromagnetism and fluid mechanics, a concept with various practical applications, including marine propulsion systems and electromagnetic pumps. This study aims to optimize a simple MHD system to improve the performance of fluid rate measurement based on electromagnetic principles. Optimization is carried out through the analysis of the influence of variations in several system characteristics, namely the given electrical voltage, the distance between electrodes, the length of the electrode, and the salinity of the saltwater. The method employed is experimental, utilizing a simple MHD system design that enables the quantitative observation of changes in the speed of saltwater resulting from the interaction between magnetic and electric fields. The speed of saltwater is measured using a visual approach with the Tracker analysis application. The results showed that increasing the voltage and salinity of the saltwater, as well as decreasing the electrode length or the distance between electrodes, all contribute to increasing the speed of saltwater flow. In other words, each parameter makes a significant contribution to fluid dynamics, thereby allowing for the optimal configuration of the MHD system. The findings in this study are expected to serve as the basis for the development of simple MHD-based fluid rate measurement instruments that are efficient and applicable, enabling a concrete illustration of electromagnetic theory and fluid dynamics.
Comparative Study of the Incorporation of Gold and Silver Nanoparticles into N-719 Dye on the Performance of Dye-Sensitized Solar Cell (DSSC) Putri, Hawinda Restu; Hun, Hilarius Donatus; Rahayu, Setiya; Herman; Pambudi, Muhammad Tegar; Wulandari, Priastuti
Spektra: Jurnal Fisika dan Aplikasinya Vol. 10 No. 3 (2025): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 10 Issue 3, December 2025
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.103.04

Abstract

The Dye-Sensitized Solar Cell (DSSC) is a promising third-generation solar cell technology with very significant enhancement in device efficiency. The modification in the fabrication of DSSC is still being studied today in order to increase the stability and lifetime of the devices. The aims of our research is to compare the incorporation of gold and silver nanoparticles capped with 3-Mercaptopropionic Acid (AuMPA or AgMPA) into N-719 dye to enhance DSSC performance. Metal nanoparticles exhibit a unique optical property called Localized Surface Plasmon Resonance (LSPR), which maximizes light absorption. In our experiment, AuMPA and AgMPA were prepared using the chemical reduction method and then incorporated into the dye solution and then in the DSSC assemble, the electrode-TiO2 layer were immersed into dye contained NPs solution. Optical characterization, including absorbance and photolumine-scence spectra, shows a blue shift in the spectral position and an overlap between the intrinsic peak of N-719 and the plasmonic peak of AuMPA or AgMPA, indicating a stable nanoparticle dispersion within the dye matrix. Fourier Transform Infrared (FTIR) spectra confirm the chemical interaction through the changes in the S-H and -COOH vibrations. Scanning Electron Microscopy (SEM) observation reveals the presence and growth of AuMPA and AgMPA nanoparticles within the mesoporous TiO2 layer. The addition of AuMPA into the dye solution increases the PCE of the device from 3.32% to 4.19%, while AgMPA yielded a PCE of 3.76%. Enhancement of our DSSC performance is attributed to the LSPR effect, which enhances light absorption and charge transport. The better performance by the addition of AuMPA into the dye is attributed to a highly substantial plasmonic effect and stability, while AgMPA tends to aggregate, limiting its effectiveness.
Co-Authors Aufia, Yasrifa Fitri Herman Hun, Hilarius Donatus Kusumastuti, Nining Pambudi, Muhammad Tegar Putri, Bella Yunisah Ratri, Bekti Afre Sani, Nurma Mahendra Setiya Rahayu, Setiya Siti Nurul Khotimah Triyanta Widayani Wulandari, Priastuti