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All Journal Komunikasi Fisika Indonesia Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam SEMIRATA 2015 Journal of Aceh Physics Society Spektra: Jurnal Fisika dan Aplikasinya Jurnal Fisika Indonesia Jurnal Pengabdian Kesehatan Journal Of Human And Education (JAHE) PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Science, Technology, and Communication Journal Jurnal Bakti UPPR
Rahmi Dewi
Universitas Riau
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Peatland aquifer zone modeling via Wenner and Schlumberger configuration geoelectric strategies in Tarai Bangun Village, Riau Province, Indonesia Tumbur Marudut Tua Sitinjak; Juandi Muhammad; Rahmi Dewi
Science, Technology, and Communication Journal Vol. 4 No. 2 (2024): SINTECHCOM Journal (February 2024)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v4i2.260

Abstract

The quality of freshwater in peatland areas poses significant concerns for both governmental bodies and local communities. Challenges arise during well drilling activities, where individuals often encounter difficulties in accessing fresh water, either due to its absence or contamination with peat-infused water. Tarai Bangun Village, situated in the Kampar Regency of Riau, represents a critical peatland region warranting thorough investigation, particularly along street of Sarana Utama. Despite lacking social amenities such as markets, the area is equipped with essential facilities like schools and places of worship. This study aims to assess the efficacy of Wenner and Schlumberger configuration modeling in horizontal and vertical soil mapping, thereby facilitating a comprehensive understanding of groundwater distribution and aquifer zoning within the peatland areas under examination. Analysis conducted utilizing Res2DInv software for horizontal modeling revealed significant findings. In track 1, groundwater layers were identified at depths of 6.50 meters and 19 meters, comprising gravel, sandstone, and limestone. Track 2 exhibited an aquifer layer spanning depths from 2.50 meters to 24.9 meters, consisting of alluvium, gravel, and limestone. Furthermore, interpretation of 1D geoelectric vertical model cross-sections using Progress software unveiled additional insights. Path 1 delineated depths of 0.12 meters, 19.30 meters, and beyond 41.28 meters, featuring a lithological composition of sandstone, limestone, and dry gravel. Path 2 showcased depths of 0.14 meters, 9.43 meters, and exceeding 12.02 meters, characterized by dry sand and gravel formations.
Properties of BaTiO3 nanoparticles based on FTIR derived using Nephelium lappaceum L. leaf extract Rahmi Dewi; Yanuar Hamzah; Yohana Manik; Friska Ziliwu; Norsinta Ida Simbolon; Hidayati Syajali; Shintya Maulidya; Yunita Ningrum; Harum Fatanah
Science, Technology, and Communication Journal Vol. 4 No. 3 (2024): SINTECHCOM Journal (June 2024)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v4i3.268

Abstract

The properties of barium titanate (BaTiO3) nanoparticles synthesized with rambutan leaf extract (Nephelium lappaceum L.) were analyzed using Fourier transform infrared spectroscopy (FTIR) characterization techniques. Rambutan leaf extract contains bioactive compounds that have the potential to enhance unique physical and chemical properties. This study aims to analyze the properties of the nanoparticles and to characterize the functional groups present in BaTiO3 nanoparticles synthesized using rambutan leaves. The nanoparticle synthesis process involved extraction, followed by the preparation of a BaTiO3 solution and doping. The FTIR spectrum displayed characteristic peaks identifying the presence of functional groups. The results indicated that the region 3500 – 3200 cm-1 corresponds to O–H groups (alcohol and phenolic), the region 1700 – 1600 cm-1 to C=O groups (carbonyl), the region 1600 – 1500 cm-1 to C=C groups (alkene), and the region 1200 – 1000 cm-1 to C–O groups (ether). Each functional group exhibits distinct properties.
FTIR characterization analysis of BaTiO3 nanoparticles synthesized using Terminalia catappa leaf extract Yanuar Hamzah; Rahmi Dewi; Ade Darmawan; Intan Syahputri; Meinikmawati Laia; Miftahul Jannah; Ruth Cahaya Marta Uli Silaban; Silvia Mayang Sari; Sintia Selfiana Sinaga; Wandra Zuyandri
Science, Technology, and Communication Journal Vol. 4 No. 3 (2024): SINTECHCOM Journal (June 2024)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v4i3.269

Abstract

Ferroelectric materials are materials that are in great demand in high-density memory applications, such as ferroelectric random access memory, ferroelectric field effect transistors, negative capacitance field effect transistors, and ferroelectric tunnel junctions. Barium titanate (BaTiO3) is a lead-free ferroelectric material with a high dielectric constant and low dielectric loss. The method used is sol gel for the synthesis of BaTiO3 solution, extract for ketapang (Terminalia catappa) leaves, and characterized by FTIR. The FTIR spectrum synthesized with ketapang leaf extract displays several characteristic peaks in the mid-infrared region (4000 – 400 cm-1). These peaks can be determined by the specific vibration mode of the structure and organic compounds contained in the ketapang leaf extract. BaTiO3 has a cubic perovskite structure with a peak wave number of 600 cm-1. Ketapang leaf extract is incorporated into the BaTiO3 structure. BaTiO3 has a Ti–O functional group. Ketapang leaf extract has C–O, C=O, C–H, and O–H functional groups.
Fourier transform infrared analysis of orange peel ferroelectric material with BaTiO3 precursor Rahmi Dewi; Yanuar Hamzah; Romarito Gesi Manurung; Ropina Emwarjati Sihombing; Lailatul Rahmi; Rahmatan Lil Alamin; Figo Swarna Yoga; Sonia Salsabila; Ananda Febri Yudani
Science, Technology, and Communication Journal Vol. 5 No. 1 (2024): SINTECHCOM Journal (October 2024)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v5i1.270

Abstract

This study explores the potential of orange peel extract as a stabilizing agent in the synthesis of ferroelectric BaTiO3. Characterization using Fourier transform infrared (FTIR) spectroscopy revealed the presence of strong acidic functional groups (O-H stretching at 3300 cm-1 and C–H sp3 chain at 2800 – 2993 cm-1 and carbonyl groups of double C–O at 1650 cm-1 in orange peel extract. These findings indicate that orange peel contains organic compounds that can be utilized in various applications.
Analysis of ferroelectric material BaTiO3 and mangosteen leaf extract using FTIR characterization Yanuar Hamzah; Rahmi Dewi; Putri Siti Asiyah; Dian Selasih; Ella Junian Putri; Ignatius Bagas Sumual Simanjuntak; Rosianna Purba; Fernita Nahampun; Desti Seri Fatimah; Abdu Rozaq Ghifariansyah
Science, Technology, and Communication Journal Vol. 5 No. 1 (2024): SINTECHCOM Journal (October 2024)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v5i1.271

Abstract

Perovskite materials, including barium titanate (BaTiO3), are important ferroelectric materials in industry and research today. Ferroelectrics have unique properties such as piezoelectricity, high permittivity, and electrocaloric and electrooptic effects that are beneficial in technological applications. BaTiO3, for example, is a lead-free ferroelectric material relevant for FeRAM and ferroelectric tunnel junctions. However, research on BaTiO3 flexible thin films is still limited, especially in the context of flexible substrates. Therefore, research in the preparation of stable and flexible BTO ferroelectric films is crucial for the advancement of nonvolatile memory devices. The manufacturing method in this study is the Sol Gel Method where the relative molecular mass of BaCO3 material is calculated, then the mass value is entered with the composition of (X)BaTiO3-(1-X)BaZr0.5Ti0.503. After the test is performed using mangosteen leaves, the resulting wave peaks from the FTIR Spectroscopy analysis can be seen. This is one of the characterization methods used to analyze the molecular structure and functional groups of various materials from which samples are made. This analysis indicates that mangosteen leaves contain various organic compounds, including alcohols, alkanes, and carbonyl compounds. In this research, further development is needed so that improvements can be made in the synthesis of ferroelectric material BaTiO3 used as a stabilizing agent.
Green-synthesized ZnO and Ag nanoparticles: A comparative study of optical, morphology and structural properties for photocatalytic applications Yanuar Hamzah; Tengku Emrinaldi; Rahmi Dewi; Ari Sulistyo Rini; Lazuardi Umar; Mediniah Putri Simatupang; Rabiah Rabiah; Muhammad Deri Noferdi
Science, Technology, and Communication Journal Vol. 5 No. 3 (2025): SINTECHCOM Journal (June 2025)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v5i3.307

Abstract

In this study, zinc oxide (ZnO) and silver (Ag) nanoparticles were synthesized using Annona muricata leaf extract as a reducing and stabilizing agent with variations in the molar ratio of 1:3, 1:5, and 1:7. Optical characterization using UV-Visible spectroscopy revealed that the variations of molar ratio influence the absorption peak and band gap energy of the resulting ZnO and Ag. UV-Vis results show that the molar ratio 1:5 was optimal for synthesizing ZnO and Ag. The band gap value of synthesized ZnO and Ag at a 1:5 molar ratio was 3.27 eV and 2.01 eV, with absorption peaks at 355 nm and 435 nm respectively. XRD characterization shows that ZnO nanoparticles has a hexagonal wurtzite structure with lattice parameters of a = 76 Å and c = 4. 95 Å and for Ag nanoparticles has a face centered cubic structure with lattice parameters a = b = c is 4.15 Å. Annona muricata leaves extract shows photocatalytic properties that can be applied to the degradation of polluted water. This shows that ZnO nanoparticles via green synthesis using Annona muricata leaf extract is a very simple, low-cost and environmentally friendly method.
Phyto mediated of SnO2 nanoparticles using Pandanus amaryllifolius extract for photocatalytic degradation of methylene blue Yanuar Yanuar; Tengku Emrinaldi; Rahmi Dewi; Lazuardi Lazuardi
Science, Technology, and Communication Journal Vol. 6 No. 3 (2026): SINTECHCOM Journal (June 2026)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v6i3.413

Abstract

The development of environmentally friendly photocatalysts is crucial for the remediation of persistent textile dyes. This study reports a novel and simple green synthesis of ultrafine tin oxide (SnO2) nanoparticles by utilising Pandanus amaryllifolius leaf extract as a bioreductor and dual function capping agent, thereby eliminating the need for toxic chemicals and high energy calcination. Comprehensive characterisation confirmed the formation of a pure tetragonal rutile phase with ultrafine crystallite sizes of 4 – 5 nm. Importantly, surface interactions mediated by phytochemicals intrinsically engineer the optical band gap to 3.50 eV, much narrower than bulk SnO2 through the formation of defect states and mid-gap states, enhancing responsiveness to visible light. The photocatalytic efficacy was evaluated under challenging conditions using a high initial concentration of Methylene Blue (MB) (100 ppm). Green synthesised SnO2 nanoparticles exhibited robust degradation performance, achieving a removal rate of 66.5% within 120 minutes. Kinetic analysis reveals a characteristic two stage pseudo first order behaviour, indicating a transition from the initial induction phase to the formation of reactive oxygen species at steady state. This research provides new insights into the engineering of semiconductor defects mediated by phytochemicals and offers highly scalable sustainable nanomaterial strategies that align with green chemistry principles for industrial wastewater treatment.
Synthesis of hybrid nanoparticle for photocatahlyst, antibacterial, and anticancer applications: A review Lulu Hayati; Rahmi Dewi; Herna Herna; Ranti Monika
Science, Technology, and Communication Journal Vol. 7 No. 1 (2026): SINTECHCOM Journal (October 2026)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v7i1.323

Abstract

Hybrid nanoparticles have attracted considerable interest in recent years owing to their multifunctional potential across a spectrum of applications, encompassing photocatalysis, antibacterial agents, and anticancer therapeutics. This review furnishes a comprehensive survey of hybrid nanoparticle synthesis, with a focus on diverse synthetic methodologies, constituent materials, and pertinent applications. A range of synthesis techniques, including co-precipitation, hydrothermal methods, mechanical milling, electron beam lithography, gas phase deposition, electrical explosion of wires, spray pyrolysis, laser pyrolysis, thermal decomposition, solvothermal synthesis, sol-gel processes, polyol methods, non-plasma thermal techniques, microemulsion synthesis, vapor deposition and patterning, as well as biological (green) synthesis routes, are explored, with a critical appraisal of their respective merits and limitations. Commonly employed nanoparticulate materials, including metal oxides (e.g., TiO2, ZnO, AgO, CuO, Fe2O3), metallic nanoparticles (e.g., Au, Ag), and organic materials (e.g., plant extracts), are discussed in detail. This review also addresses the applications of hybrid nanoparticles in photocatalysis for the degradation of wastewater pollutants, as antibacterial agents for the control of microorganisms, and in anticancer therapies. Furthermore, the underlying mechanisms governing the photocatalytic, antibacterial, and anticancer activities of hybrid nanoparticles are also elucidated. By synthesizing recent advancements in the synthesis and applications of hybrid nanoparticles, this review aims to provide valuable insights and stimulate further investigation within this rapidly evolving domain.
Co-Authors ', Krisman ', Krisman ', Nurmairanti ', Sugianto ', Susilawati Aan Anisah Abdu Rozaq Ghifariansyah Ade Darmawan Adela, Adela Aisy, Rihla Datul Ananda Febri Yudani Apriwandi Aritonang, Surya Ardika Asrinaldo, Brian Noval Awaludin Martin Azhara, Vina Naomi Befriana Ayu Rizki Beniqna Maharani Besmaya Butarbutar, Kheny Kernila Desti Seri Fatimah Detri Yulitah Dewi, Dian Cynthia Dian Selasih Ella Junian Putri Erman Taer Fauziana - Febrita, Ayang Fernita Nahampun Figo Swarna Yoga Fitri Hayati Friska Ziliwu Hardanto, Lilik Tri Harum Fatanah Herna Herna Hidayati Syajali Ignatius Bagas Sumual Simanjuntak Intan Syahputri Juandi Juandi Juandi Muhammad Julnaidi, Julnaidi Khaironiati - Kresna, Pharada Krisman Krisman Lailatul Rahmi Lazuardi Lazuardi Lazuardi Umar Lulu Hayati Manalu, Wesly Arianto Maslyah, Maharani Nur Mbantun Ginting Mediniah Putri Simatupang Meinikmawati Laia Miftahul Jannah Muhammad Deri Noferdi Muhammad Nasir Nathania, Nazhiwa Norsinta Ida Simbolon Nuraini, Nasywa Nursyafni, Nursyafni Nursyahara, Septia Oktapiana, Putri Dian Pasaribu, Veny Sriulina Pratiwi, Dinda Primadevi, Inggit Purba, Cenora Evelynza Putri Siti Asiyah Putri, Nadja Melika Rabiah Rabiah Rahmad Efendi Rahmatan Lil Alamin Rakhmawati Farma Ranti Monika Richiy Brantasona Safri Awang Ali Rika Taslim Rini, Ari Sulistyo Rohmawati Rohmawati Romarito Gesi Manurung Ropina Emwarjati Sihombing Rosianna Purba Rusmanianty, Rusmanianty Ruth Cahaya Marta Uli Silaban Safira, Putri Sari, Eza Tirta Sawitri, Seli Novalin Shintya Maulidya Silvia Mayang Sari Sintia Selfiana Sinaga Siti Komariah Sonia Salsabila Taufiq Hidayat Taufiq Hidayat Tengku Emrinaldi Tengku Said Hussain Shahab Tengku Said Luqman Hussain Shahab Tiara Pertiwi Titin Hartini Trisnawati, Budi Tumbur Marudut Tua Sitinjak Wahyu Akbar Illahi Wandra Zuyandri Widi Arti Wulandari, Anna Dwi Yanuar Hamzah Yanuar Hamzah Yanuar Yanuar Yanuar Yanuar Yohana Manik Yunita Ningrum Zannah, Miftahul Zuhdi Ma’aruf Zulfa Zulfa Zulkarnain Usman