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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 PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Science, Technology, and Communication Journal Jurnal Bakti UPPR

Rahmi Dewi

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Author-ID : 252841

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Karakterisasi Mikrostruktur Material Feroelektrik Ba0.8Sr0.2TiO3 (BST) dengan Variasi Suhu Annealing (Halaman 70 s.d. 72) Rahmi Dewi; Krisman -; Khaironiati -; Fauziana -
Jurnal Fisika Indonesia Vol 18, No 53 (2014)
Publisher : Department of Physics Universitas Gadjah Mada

Sampel Barium Strontium Titanate, Ba0.8Sr0.2TiO3 (BST) telah disediakan dengan menggunakan reaksi kimia padatan. Mikrostruktur sampel telah dikarakterisasi dengan menggunakan teknik difraksi sinar-X (XRD) dan Scanning Electron Microscopy (SEM). Sampel disediakan dengan variasi suhu yang berbeda yaitu pada suhu 600oC, 700 oC dan 800oC selama 60 menit di udara. Karakterisasi XRD menunjukkan dengan meningkatnya suhu annealing maka kristaline sampel semakin meningkat dengan struktur tetragonal. Karakterisasi SEM menunjukkan sampel adalah homogen dengan ukuran butiran seragam. Ukuran butiran sampel akan bertambah dengan bertambahnya suhu annealing. Seluruh sampel mempunyai ukuran butiran dalam nanometer.

Karakterisasi Mikrostruktur Material Feroelektrik Ba0.3Sr0,7TiO3 (BST) dengan variasi suhu annealing Rahmi Dewi; Krisman Krisman
Jurnal Fisika Indonesia Vol 21, No 1 (2017)
Publisher : Department of Physics Universitas Gadjah Mada

Telah dilakukan pembuatan sampel dari bahan Barium Strontium Titanat (BST) dengan komposisi Ba0,3Sr0,7Tio3 dengan menggunakan metode sol gel dan di annealing pada suhu 600oC,650oC dan 700oC. Ukuran butira dan ketebalan sampel dikarakterisasi menggunakan Field Emission Scanning Microscopy (FESEM). Ukuran butiran meningkat dengan meningkatnya suhu annealing. Nilai rata-rata ukuran butiran dari temperatur 600oC, 650oC dan 700oC adalah : 21,20 nm; 22,30 nm dan 26.8 nm. Nilai ketebalan sampel masing-masing adalah 31,28 nm;37,5nm dan 39,08nm.

PENENTUAN CELAH PITA ENERGI FILM TIPIS BARIUM STRONSIUM TITANAT (Ba1-xSrxTiO3) UNTUK x= 0,4 ; 0,5 DAN 0,6 Rahmi Dewi; Krisman Krisman; Taufiq Hidayat
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Barium Strontium Titanate (BST) thin film on the substrate glass was successfully fabricated by using sol-gel method. The purpose of this research is to obtain optical energy band gap value by adopting Tauc plot method with various composition and temperature. Obtaining of such information could be through identifying the degree of absorbance, degree of transmittance, the extent of refractive index, the usage of thin film and its quantified coefficients. Subsequently, the optical properties of thin film are characterized by using Ultraviolet-Visible Spectrophotometer with a thin film of Ba1-xSrxTiO3 subjected to temperatures of 650ÂºC. Upon subjected to temperature stated above, the wide energy band gap optical thin film Ba0,6Sr0,4TiO3 is in the range of 2.0 eV for Ba0,5Sr0,5TiO3 is in the range of 1.55 eV and for Ba0,4Sr0,6TiO3 is in the range of 2.0 eV. Keywords: Thin Film BST, Composition, Temperature, Energy Band Gap.

CHARACTERIZATION OF ENERGY BAND GAP THIN FILM BaTiO3 – BaZr0.5Ti0.5O3 USING DIFUSION REFLECTANCE SPECTROSCOPY (DRS) METHOD Dewi, Rahmi; Manalu, Wesly Arianto; Asrinaldo, Brian Noval; Rini, Ari Sulistyo; Yanuar, Yanuar
Spektra: Jurnal Fisika dan Aplikasinya Vol. 8 No. 1 (2023): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 8 Issue 1, April 2023
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.081.02

Ferroelectric material is a dielectric material that has a high dielectric constant value so that it can be made in the form of thin films. Its application is based on electro-optical properties, one of which is the infrared thermal switch. This paper aims to determine the bandgap energy (Eg) of a 0.3BaTiO3 – 0.7BaZr0.5Ti0.5O3 thin film. The 0.3BaTiO3 – 0.7BaZr0.5Ti0.5O3 thin film is a semiconductor material with the valence band and conduction band separated by an energy bandgap (Eg). Thin films of 0.3BaTiO3 – 0.7BaZr0.5Ti0.5O3 were grown on FTO substrates using the sol-gel method. The films of 0.3BaTiO3 – 0.7BaZr0.5Ti0.5O3 were annealed at different temperatures of 700°C, 750°C and 800°C within 1 hour. Characterization was carried out using Ultra Violet Visible (UV-Vis) spectroscopy to determine Eg using the Diffusion Reflectance Spectroscopy (DRS) method. The DRS method was found to be better for solid materials considering the scattering component. The UV-Vis characterization results show that an increase in annealing temperature causes a decrease in Eg. For example the values at 700°C, 750°C and 800°C are 3.5 ± 0.01 eV; 3.3±0.01 eV and 3.2±0.01 eV. The decrease in Eg is related to the diffusion of Barium Titanate (BaTiO3) ions into the Barium Zirconium Titanate (BZT) lattice forming a new sub-gap which in turn gives BT-BZT the ability to absorb lower light. Lower light absorption means more capable optics for multilayer systems.

Peatland aquifer zone modeling via Wenner and Schlumberger configuration geoelectric strategies in Tarai Bangun Village, Riau Province, Indonesia Sitinjak, Tumbur Marudut Tua; Muhammad, Juandi; Dewi, Rahmi
Science, Technology and Communication Journal Vol. 4 No. 2 (2024): SINTECHCOM Journal (February 2024)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

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

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 Dewi, Rahmi; Hamzah, Yanuar; Manik, Yohana; Ziliwu, Friska; Simbolon, Norsinta Ida; Syajali, Hidayati; Maulidya, Shintya; Ningrum, Yunita; Fatanah, Harum
Science, Technology and Communication Journal Vol. 4 No. 3 (2024): SINTECHCOM Journal (June 2024)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

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

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 Hamzah, Yanuar; Dewi, Rahmi; Darmawan, Ade; Syahputri, Intan; Laia, Meinikmawati; Jannah, Miftahul; Silaban, Ruth Cahaya Marta Uli; Sari, Silvia Mayang; Sinaga, Sintia Selfiana; Zuyandri, Wandra
Science, Technology and Communication Journal Vol. 4 No. 3 (2024): SINTECHCOM Journal (June 2024)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

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

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.

Harnessing multi-doping porous carbon from Musa paradisiaca L. peel waste for solid-state supercapacitors Purba, Cenora Evelynza; Nursyafni, Nursyafni; Apriwandi, Apriwandi; Kresna, Pharada; Julnaidi, Julnaidi; Nasir, Muhammad; Farma, Rakhmawati; Dewi, Rahmi; Martin, Awaludin; Hardanto, Lilik Tri; Taslim, Rika; Taer, Erman
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.187-196

The demand for low-cost carbons with multi-doping in supercapacitors has led to a significant focus on utilizing biomass waste to produce activated carbons. The research successfully utilized Musa paradisiaca L. (MPL) peel as a porous carbon for solid-state supercapacitor. The process involved collecting banana peel waste, drying the peels using sunlight, pre-carbonization using a furnace, pH neutralization, drying, crushing carbon particles, and ensuring uniform particle size. Different concentrations of the catalytic ZnCl2 solution (300, 500, and 700 mmol/g) were selected to optimize physical and electrochemical properties. The resulting chemically activated MPL carbon powder was evaluated using SEM-EDS, XRD, and BET. MPL activated carbon with a 500 mmol/g solution of ZnCl2 was found to have optimal physical properties with a carbon percentage of 81.65%, oxygen 17.39%, phosphorus 0.42%, and boron 0.52%. Electrochemical properties were evaluated using dual-electrode system was exhibited the highest specific capacitance of 67 F/g. These findings demonstrate the potential of MPL peel waste as a high quality electrode for supercapaicor next-generation.

Effect of holding time on optical structure properties of Ba(Zr0.5Ti0.5)O3 thin film using sol-gel method Hidayat, Taufiq; Dewi, Rahmi; Hamzah, Yanuar
Science, Technology and Communication Journal Vol. 1 No. 2 (2021): SINTECHCOM Journal (February 2021)
Publisher : Lembaga Studi Pendidikan and Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v1i2.28

The ferroelectric thin film material of barium zirconium titanate (BZT) on the fluorine-doped tin oxide (FTO) glass substrate was successfully prepared using the sol-gel method. The purpose of this study was to determine the effect of crystal size on the variation of holding time. The lattice parameter data has a value of a = b of 3.918 Å and for c it is 4.01 Å. The results of this study indicate that the crystal structure of BZT is tetragonal because the lattice parameter has the same values a and b but not equal to c. To obtain the bandgap energy, a thin film plot method of Ba(Zr0.5Ti0.5)O3 was used at a temperature of 700°C with a holding time of 30 minutes, 1 hour, 1 hour 30 minutes, and 2 hours. The optical thin layer bandgap energy of Ba(Zr0.5Ti0.5)O3 was calculated using the Tauc plot. The absorbance values obtained were 3.277, 3.0654, 3.323, and 3.424 a.u. The maximum transmission (TM) occurs at 1 hour holding time which gives a percentage of TM1 44.477% and TM2 20.568%. While the 2 hour hold time gives a minimum transmission (Tm) of Tm1 10.859% and Tm2 7.759%, respectively.

Analysis of ferroelectric material BaTiO3 and mangosteen leaf extract using FTIR characterization Hamzah, Yanuar; Dewi, Rahmi; Asiyah, Putri Siti; Selasih, Dian; Putri, Ella Junian; Simanjuntak, Ignatius Bagas Sumual; Purba, Rosianna; Nahampun, Fernita; Fatimah, Desti Seri; Ghifariansyah, Abdu Rozaq
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

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.

Co-Authors ', Krisman ', Krisman ', Nurmairanti ', Sugianto ', Susilawati Aan Anisah Adela, Adela Aisy, Rihla Datul Alamin, Rahmatan Lil Apriwandi Apriwandi . Aritonang, Surya Ardika Asiyah, Putri Siti Asrinaldo, Brian Noval Awaludin Martin Azhara, Vina Naomi Befriana Ayu Rizki Beniqna Maharani Besmaya Butarbutar, Kheny Kernila Darmawan, Ade Detri Yulitah Erman Taer Fatanah, Harum Fatimah, Desti Seri Fauziana - Febrita, Ayang Fitri Hayati Ghifariansyah, Abdu Rozaq Hardanto, Lilik Tri Juandi Juandi Julnaidi, Julnaidi Khaironiati - Kresna, Pharada Krisman Krisman Laia, Meinikmawati Lailatul Rahmi Lazuardi Umar Manalu, Wesly Arianto Manik, Yohana Manurung, Romarito Gesi Maslyah, Maharani Nur Maulidya, Shintya Mbantun Ginting Miftahul Jannah Muhammad Nasir Nahampun, Fernita Nathania, Nazhiwa Ningrum, Yunita Noferdi, Muhammad Deri Nuraini, Nasywa Nursyafni, Nursyafni Nursyahara, Septia Oktapiana, Putri Dian Pasaribu, Veny Sriulina Pratiwi, Dinda Purba, Cenora Evelynza Purba, Rosianna Putri, Ella Junian Putri, Nadja Melika Rabiah Rabiah Rahmad Efendi Rakhmawati Farma Richiy Brantasona Safri Awang Ali Rika Taslim Rini, Ari Sulistyo Rini, Ari Sulistyo Rusmanianty, Rusmanianty Safira, Putri Salsabila, Sonia Sari, Eza Tirta Sari, Silvia Mayang Sawitri, Seli Novalin Selasih, Dian Sihombing, Ropina Emwarjati Silaban, Ruth Cahaya Marta Uli Simanjuntak, Ignatius Bagas Sumual Simatupang, Mediniah Putri Simbolon, Norsinta Ida Sinaga, Sintia Selfiana Siti Komariah Sitinjak, Tumbur Marudut Tua Syahputri, Intan Syajali, Hidayati Taufiq Hidayat Taufiq Hidayat Tengku Emrinaldi Tengku Said Hussain Shahab Tengku Said Luqman Hussain Shahab Tiara Pertiwi Titin Hartini Wahyu Akbar Illahi Yanuar Hamzah Yanuar Yanuar, Yanuar Yoga, Figo Swarna Yudani, Ananda Febri Zannah, Miftahul Ziliwu, Friska Zuhdi Ma’aruf Zulfa Zulfa Zulkarnain Usman Zuyandri, Wandra

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