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All Journal Journal of Energy, Material, and Instrumentation Technology Jurnal Pendidikan MIPA
Fitriani, Nur Shabrina
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Control & Systems Engineering Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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The Effect of Chitosan Addition on Phase Composition and Detection Sensitivity of Fe3O4/Chitosan Magnetic Label Nanoparticles Based on Giant Magnetoresistance Sensor Prayoga, Galih Aji; Oktarisa, Yuvita; Antarnusa, Ganesha; Fitriani, Nur Shabrina; Aryani, Refi Meilia; Suherman, Andri; Guntara, Yudi
Journal of Energy, Material, and Instrumentation Technology Vol 5 No 4 (2024): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v5i4.282

Abstract

This study describes how phase composition affects the ability of giant magnetoresistance (GMR) chip-based sensors to detect magnetic labels made of Fe3O4 and Fe3O4/chitosan that were synthesized using the co-precipitation method. X-ray diffraction (XRD) analysis revealed that the synthesized nanoparticles were a mixture of magnetite and maghemite phases. The most intense diffraction peak at 2θ = 35.6° (311) confirmed the presence of the magnetite phase. The addition of chitosan significantly increased the proportion of the maghemite phase from 10% to 25%, with the appearance of an additional peak at 2θ = 33° (221). The modification of Fe3O4 nanoparticles into Fe3O4/chitosan nanocomposites resulted in changes in sensor sensitivity. The GMR sensor successfully detected Fe3O4 and Fe3O4/chitosan magnetic labels within 30 seconds with high sensitivities of 0.746 and 0.761 mV/( g/mL), respectively. The limit of detection (LOD) was also very low at 0.419 and 0.428 g/mL. These findings show that Fe3O4/chitosan nanocomposites integrated GMR chip-based sensors can be a dependable instrument for detecting a variety of biomolecules such as Bovine serum albumin (BSA).
Advance Physics Virtual Laboratory (ADPHYLAB): Its Implication in Improving Students' Science Process Skills in Atomic Spectroscopy Practicum Guntara, Yudi; Fitriani, Nur Shabrina; Tabrani, Rizqi A’mal Hibatullah; Tanjung, Winnei Ray Beatrix; Marwanti, Kissi; Wibowo, Firmanul Catur; Bunyamin, Muhammad Abd Hadi
Jurnal Pendidikan MIPA Vol 25, No 2 (2024): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

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Abstract

Understanding the concept of physics students can not be achieved through lectures alone, but required practicum. However, limited equipment makes practicum difficult to do as an example of atomic spectroscopy. However, the use of information technology-based media in the form of virtual laboratories can be used as an alternative choice without losing its essence to facilitate Science Process Skills (SPS). This study aims to compare the improvement of students' SPS in atomic spectroscopy practicum using Advance Physics Virtual Laboratory (ADPHYLAB) and LABSTER. This research is a modified type of comparative research. The research time was conducted for 3 meetings, located in the Physics Laboratory of FKIP UNTIRTA. The research subjects were 8 physics laboratory assistants. The results showed that the SPS N-Gain score in the group using ADPHYLAB obtained consecutive values for classification, measurement, data interpretation and inferring indicators of 0.73; 0.89; 0.71 and 0.94, falling into the high category. While the group using LABSTER obtained scores on classification and measurement indicators of 0.40 and 0.53, falling into the medium category. While in the data interpretation and inferring indicators of 0.79 and 0.80 fall into the high category. Based on the results of the study, it can be concluded that ADPHYLAB-based learning media can improve student SPS compared to LABSTER-based learning media.         Keywords: ADPHYLAB, virtual laboratory, LABSTER, science process skills, atomic spectroscopy. DOI: http://dx.doi.org/10.23960/jpmipa/v25i2.pp932-945
Co-Authors Andri Suherman Aryani, Refi Meilia Aryati, Deni - Bunyamin, Muhammad Abd Hadi Firmanul Catur Wibowo Ganesa Antarnusa Guntara, Yudi Marwanti, Kissi Prayoga, Galih Aji Tabrani, Rizqi A’mal Hibatullah Tanjung, Winnei Ray Beatrix Yuvita Oktarisa, Yuvita