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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) International Journal of Research and Community Empowerment
Martila, Lenny Intan
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Astronomy Chemistry Earth & Planetary Sciences Education Materials Science & Nanotechnology Mathematics Physics Social Sciences

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Laser-Induced Graphene Oxide on Polyimide Sheet: The Effect of Current Regulation on the Laser Power Stability Martila, Lenny Intan; Suryadi, Suryadi; Nursidik Yulianto; Yuliati Herbani; Isnaeni, Isnaeni; Supardi, Zainul Arifin Imam; Suaebah, Evi; Iyon Titok Sugiarto
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 14 No. 1 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v14n1.p100-112

Abstract

Graphene oxide is a two-dimensional substance that shares the same structure as graphene and can be produced using several methods. The difficulty for green technology lies in developing a cost-effective and efficient method to produce graphene and graphene oxide without relying on chemical processes. A highly sustainable technology involves the use of a laser diode, which is both cost-effective and environmentally friendly. This technique produces a material known as laser-induced graphene/graphene oxide (LIG/LIGO). From a commercial standpoint, the laser diode is typically purchased without an electronic stabilizer component. Nevertheless, laser stability is crucial for the production process of LIG/LIGO. The objective of our study is to examine the impact of laser current management on the production of graphene on a polyimide (PI) sheet utilizing a 450 nm diode laser. The laser controller we utilize is the National Instruments (NI) PXIe-1085 device. The optical power of the laser diode was measured between 0.21 and 0.79 W. After the laser current was stabilized, the power slightly shifted, ranging from 0.18 to 0.86 W. Both experiments were conducted with a current range of 0.3 to 1 A. Before regulation, the laser diode experiences current fluctuations in the range of around 0.01 to 0.03 A. The study findings highlight the significance of laser current management in manufacturing LIG/LIGO by ensuring a consistent and precise laser power output, hence minimizing flaws in the final product. However, the analysis reveals that graphene oxide is the predominant yield in this characterization. This fact is caused by the presence of a graphene layer not exposed to the surface during measurement. This approach provides several benefits, such as the capacity to produce graphene/GO in a targeted, non-chemical, and fast manner, as well as its potential for diverse applications.
Socialization and Training on Processing LDPE (Low-Density Polypropylene) Plastic Waste into Paving Blocks Agustinur, Satya Cantika; Basmalah, Mazaya; Novianti, Eni; Lestari, Emilia Dwi; Martila, Lenny Intan; Putri, Rahadian Dwi Oktavia; Yantidewi, Meta; Deta, Utama Alan
International Journal of Research and Community Empowerment Vol. 1 No. 1 (2023): Febuary 2023
Publisher : Mitra Edukasi dan Publikasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58706/ijorce.v1n1.p14-21

Abstract

The increasing amount of waste in Indonesia, especially in Surabaya, is a severe problem that must be resolved immediately. The amount of plastic waste in the city of Surabaya is one of the causes of damage to the environment. So that the plastic waste must be processed so that it can be reduced. Surabaya State University KKN students made this problem the basis for implementing the Socialization and Training of Plastic Waste Processing Types of LDPE (Low-Density Polypropylene) into Paving Blocks. The purpose of this activity is as an effort to reduce the amount of plastic waste and provide alternative new jobs for the community. This activity applies the lecture method, question and answer, simulation and practice. The action begins with the opening and filling out of the pre-test, then continues with filling in the material, making simulations, and the activity ends with closing and filling in the post-test. The pre-test and post-test assessments results showed that the participant's knowledge of the material was still classified as "low" with an average pre-test score of 52.40% and an increase in knowledge of the material as indicated by the post-test average score of 87 .27%. The activity concludes that participants experience an increase in knowledge and understanding of handling plastic waste into paving blocks and have knowledge about tools, materials, and processing methods to be applied in everyday life.
Co-Authors Agustinur, Satya Cantika Basmalah, Mazaya Isnaeni Isnaeni Iyon Titok Sugiarto Lestari, Emilia Dwi Novianti, Eni Nursidik Yulianto Putri, Rahadian Dwi Oktavia Suaebah, Evi Suryadi Suryadi Utama Alan Deta Yantidewi, Meta Yuliati Herbani ZAINUL ARIFIN IMAM SUPARDI