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All Journal Journal of Mathematical and Fundamental Sciences JFA (Jurnal Fisika dan Aplikasinya) POLYGLOT Jurnal Sinergitas PkM & CSR Martabe : Jurnal Pengabdian Kepada Masyarakat LOSARI: Jurnal Pengabdian Kepada Masyarakat Prosiding Konferensi Nasional PKM-CSR InSTEM
Maya Puspitasari Izaak
Universitas Pelita Harapan
Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Health Professions Languange, Linguistic, Communication & Media Library & Information Science Mathematics Nursing Physics Public Health Social Sciences Transportation Other

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Effects of Zinc-ion Substitution on the Structure and Electrical Conductivity of Sodium-Nickel-Manganese Materials as Cathode Materials: Maya Puspitasari Izaak, Yohanes Edi Gunanto, Henni Sitompul, Yustinus Purwamargapratala Maya Puspitasari Izaak Maya Puspitasari Izaak; Yohanes Edi Gunanto Yohanes Edi Gunanto; Henni Sitompul Henni Sitompul; Yustinus Purwamargapratala Yustinus Purwamargapratala
Jurnal Fisika dan Aplikasinya Vol 19 No 3 (2023): October 2023 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v19i3.3082

Abstract

Sodium is one of the new materials to replace Lithium in battery manufacture. For this reason, further research is needed to explore this new material and its composition that meets the cathode material standards. This research aims to synthesize and characterize the Sodium-Nickel-Manganese material with the Zn2+ combination, which is expected to be used as a battery cathode material. The characterization used is XRD, SEM, and LCR-meter. In this research, we succeeded in synthesizing and characterizing Sodium-Nickel-Manganese material with a particle size of around 250-500 nm. Characterization using an LCR meter obtained conductivity values of 6.77 ×10-6,7.46×10-4 and 5.45×10-2S/cm at 100 Hz, 1.86 ×10-6,8.75×10-4 and 1.16 S/cm at 1.5 KHz, 1.7 ×10-6,9.45×10-4 and 1.51 S/cm at 3 KHz, for Zn2+ substitution with x=0.1, 0.15, and 0.20, respectively.
Effect of Lanthanum Substitution on the Structure and Conductivity of LNMC Samples as Battery Cathodes: Maya Puspitasari Izaak, Y. E. Gunanto, H. Sitompul, Y. Purwamargapratala Maya Puspitasari Izaak Maya Puspitasari Izaak; Y. E. Gunanto Y. E. Gunanto; H. Sitompul H. Sitompul; Y. Purwamargapratala Y. Purwamargapratala
Jurnal Fisika dan Aplikasinya Vol 18 No 1 (2022): January 2022 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v18i1.10902

Abstract

Lithium-Nickel-Manganese-Cobalt (LNMC) is one of the most successful types of lithium-ion batteries in the market. This battery is a combination of three main metals, nickel, manganese, and cobalt, with relatively the same composition. Measurements was performed on three LMNC materials combined with La composites to reduce the toxicity level of the Cobalt. The purpose of this research is to synthesize and characterize LMNC materials with certain La combinations, thus it is expected to be able to be used as battery cathode. Characterization of materials was carried out using XRD, SEM, and LCR-meter. In this study, we succeed in synthesizing and characterizing LMNC materials with a size of about 150-750 nm. The LCR-meter characterization found conductivity values of approximately 1.06×10-3, 7.07×1010-4, and 4.05×1010-3 S/cm at 100 Hz, 2.29×1010-3, 2.56×1010-3, and 1.34×1010-2 S/cm at 2.5 MHz, 2.74×1010-3, 3.04×1010-3, and 1.51×1010-2 S/cm at 5 MHz for La dopping with x = 0.01, 0.03, and 0.05, respectively. The La substitution increases the conductivity value and reduces the particle size to nanoscale.
Development of Magnetic Functional Materials Based on Carbon/Manganite/Ferrite Composites for Microwave Absorber Materials Applications: Maya Puspitasari Izaak, Yohanes Edi Gunanto, Henni Sitompul, Wisnu Ari Adi Maya Puspitasari Izaak Maya Puspitasari Izaak; Yohanes Edi Gunanto Yohanes Edi Gunanto; Henni Sitompul Henni Sitompul
Jurnal Fisika dan Aplikasinya Vol 17 No 2 (2021): June 2021 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i2.8978

Abstract

The synthesis of carbon/manganite/ferrite composite materials for microwave absorber applications has been successfully carried out with variations in the composition of 15:55:30 and 15:45:40 (wt%). This composition was successfully confirmed based on the analysis of the X-ray diffraction pattern using the GSAS program. The refinement results show that each phase of each composite has a good structure. Based on surface morphological observations, it is known that the composite samples have varying particle sizes of around 150-500 nm which are evenly distributed over the entire surface of the sample. The result of the microwave absorption analysis implies that the difference in composition results in a slight increase of the reflection loss and the presence of a new absorption peak at a frequency of 4.36 GHz. Our result underlines that the characteristic of microwave absorption in composites is insignificantly influenced by the composition of the material as the absorption properties are mainly affected by the respective phases that form it, not by the entire phase of the composite.
The Synthesis of TiO2 nanoparticles by Milling and Coprecipitation Mixed Method: Maya Puspitasari Izaak, Yohanes Edi Gunanto, Henni Sitompul, Wisnu Ari Adi Maya Puspitasari Izaak Maya Puspitasari Izaak; Yohanes Edi Gunanto Yohanes Edi Gunanto; Henni Sitompul Henni Sitompul; Wisnu Ari Adi Wisnu Ari Adi
Jurnal Fisika dan Aplikasinya Vol 16 No 2 (2020): June 2020 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i2.5199

Abstract

Ilmenite type Fe2O3 waste (which is processed from natural iron sand) was processed into TiO2 nanoparticles powder carried out by leaching with HCl and then using high-energy milling (HEM) for 50 hours. The characteristics of the powder such as particle size, size distribution and phases were analyzed using various techniques such as XRD, SEM, EDS and particle size analyzer. Synthesis and characterization of ilmenite type iron sand have been successfully made into TiO2 by milling and coprecipitation mixed method. The purity level of TiO2 was obtained by 85.01%. Particle size of TiO2 was approximately 500 nm.
The Implementation of the Tutoring Program in SABI Village and a Parent Seminar to Improve Students’ Academic Achievement Kurniawati Martha; Edelin Nery Malaifani; Rosma Indriana Purba; Maya Puspitasari Izaak; Henni Sitompul; Yohanes Edi Gunanto
LOSARI: Jurnal Pengabdian Kepada Masyarakat Vol. 8 No. 2 (2026): (Articles in Progress)
Publisher : LOSARI DIGITAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53860/losari.v8i2.623

Abstract

Educational challenges in Kampung Sabi, Bencongan, Tangerang are characterized by students’ limited understanding of fundamental concepts in Mathematics and Science, as well as low parental involvement due to socio-economic constraints and low levels of educational attainment. This community service program aimed to improve students’ academic achievement and strengthen parental engagement through a participatory approach. The program included twice-weekly onsite tutoring for approximately 40 students from elementary to secondary levels, facilitated by Teachers College students, and parent seminars conducted through structured discussions and guided activities. The results showed improved student learning outcomes, reflected in higher post-test scores, improved report card performance, and increased learning motivation. Parental participation also increased, as seen in stronger academic support and more effective communication. These findings indicate that collaboration among students, parents, and tutors can sustainably improve educational quality.
Co-Authors Bermuli, Jessica Edelin Nery Malaifani Emiliana Emalallan Ernie Bertha Nababan Gunanto, Yohanes E H. Sitompul H. Sitompul Henni Sitompul Henni Sitompul Henni Sitompul Henni Sitompul Henni Sitompul Henni Sitompul Henni Sitompul Jessica Elfani Bermuli Juliana Purba, Friska Kurniawati Martha Kurniawati Martha Lia Kristina Sianipar Lia Sianipar M.Si, Henni Sitompul Martha, Kurniawati Maykel Manawan Murniwati Gulo Rosma Indriana Purba Sianipar, Lia Kristina Sitompul, Henni Tahya, Candra Yulius Wisnu Ari Adi Wisnu Ari Adi Wisnu Ari Adi Y. E. Gunanto Y. E. Gunanto Y. Purwamargapratala Y. Purwamargapratala Yohanes E Gunanto Yohanes Edi Gunanto Yohanes Edi Gunanto Yohanes Edi Gunanto Yohanes Edi Gunanto Yohanes Edi Gunanto Yohanes Edi Gunanto Yohanes Edi Gunanto Yohanes Edi Gunanto Yunasfi Yunasfi Yustinus Purwamargapratala Yustinus Purwamargapratala