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All Journal Komunikasi Fisika Indonesia Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Journal of Aceh Physics Society Spektra: Jurnal Fisika dan Aplikasinya Unri Conference Series: Community Engagement PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Science, Technology, and Communication Journal Journal of Engineering and Technological Sciences
Rini, Ari Sulistyo
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Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics Other

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STRUKTUR, MORFOLOGI, DAN AKTIVITAS BIMETALIK RU-SN/AL2O3 YANG DISINTESIS DENGAN METODA KONVENSIONAL DAN MIKROWAVE Ari Sulistyo Rini; Shahidan Radiman; Mohd. Ambar Yarmo
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 6 (2017): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2017
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1970.691 KB) | DOI: 10.21009/03.SNF2017.02.MPS.10

Abstract

Preparation method plays an important role to produce and improve the properties of materials. Microwave-assisted preparation method has developed rapidly as a benign preparation procedure due to its fast and uniform heating mechanisms. To study the effect of preparation method, bimetallic Ru-Sn based catalyst has been synthesized by using conventional and microwave impregnation methods. In this study, microwave power used was 700 W. Metallic reduction process of ion Run+ and Snn+ were monitored using UV-Vis spectrometer. Samples were then characterized using XRD, SEM and TEM. According to TEM results, morphology of catalyst strongly depends on the preparation route and stabilizing agent. Sample with PVP (polyvinyl pyrrolidone) has better metallic nanoparticles distribution. The sample prepared by conventional method shows agglomeration of nanoparticles on the support. Catalytic activities of both samples were examined in reduction reaction of pollutant, i.e. 4-nitrophenol. The catalytic examination has shown that reaction rate of 4-nitrophenol reduction by using microwave-assisted sample has improved 3.5 times faster than conventional impregnation sample.   Keywords: microwave, bimetallic, nanomaterial, Ruthenium-Tin, catalyst
PEROVSKITE SOLAR CELLS YANG STABIL UDARA DAN EFISIEN MENGGUNAKAN NANOSTRUKTUR ZnO SEBAGAI ELEKTRON TRANSPORT MATERIAL Herna Herna; Farhan Lutfi; Ebigail Nur Tabita Tambunan; Yessi Meinarti; Ari Sulistyo Rini
Komunikasi Fisika Indonesia Vol 19, No 2 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.2.75-82

Abstract

The latest generation of photovoltaic cells are perovskite-based solar cells that can be fabricated through a simple and affordable process using high-efficiency solar power. This review also present zinc oxide (ZnO) adopted as an electron transport material (ETM) layer in the planar perovskitesolar cells due to its simple shynthesis and excellent electrical properties. ZnO ETM in conventional perovskite. Doping Aluminium (Al) with ZnO (AZO) was used the organic cation (CH3NH+3) of perovskite. The AZO ETM  was prepared by spin coating technique with AZO sol-gel   0, 0.5, 1, 1.5, 2, 2.5 and 3% Al doping. The perovskite solar cells with AZO ETM above 1.5% Al doping exhibits better and stable the performance cells because doing so can encourage the charge transporting and match the band energy with MAPl3 compared to pure ZnO.
POTENSI NANOPARTIKEL PERAK HASIL BIOSINTESIS MENGGUNAKAN EKSTRAK KULIT SENTUL SEBAGAI PENDETEKSI LOGAM MERKURI Ari Sulistyo Rini; Anggrid Fitrisia; Yolanda Rati
Komunikasi Fisika Indonesia Vol 19, No 3 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.3.190-194

Abstract

Silver (Ag) nanoparticles have recently been widely applied due to its high surface plasmon resonance (SPR) properties compared to other metals. In this present work, Ag nanoparticles were prepared through a green synthesis technique that uses sentul peel extracts as a reducing agent. Ag nanoparticles were prepared by reacting AgNO3 and the extract at the volume ratios of 4:1, 3:2, and 1:1. These solutions were heated at 80°C for 30 minutes to form colloidal silver nanoparticles. The optical properties of Ag nanoparticles were characterized using UV-Vis and FTIR spectroscopy. Furthermore, Ag nanoparticles were tested as an indicator of mercury metal detection in term of colorimetric. The UV-Vis absorbance peak of Ag nanoparticles was obtained at wavelengths of 409 nm, 408 nm, and 402 nm. The FTIR spectrum showed the presence of four functional groups, namely, C≡C, C=O, HC≡CH, and O-H. The optimum sample of Ag nanoparticles in the detection of metallic mercury is the 4:1 sample because it shows a significant colour change.
ANALISA SIFAT ELEKTROKIMIA ELEKTRODA SUPERKAPASITOR BERBASIS KARBON AKTIF DARI KULIT SINGKONG Eva Wahyuni Harahap; Eman Taer; Ari Sulistyo Rini
Komunikasi Fisika Indonesia Vol 20, No 2 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.2.115-122

Abstract

Another problem from technological developments and advancements is the increase in population which causes increasingly complex waste management problems. One type of  urban waste is waste caused by industrial waste such as waste from processing cassava or cassava. The use of cassava peel as a precursor of activated carbon with a high specific capacitance value has been proven. The resulting carbon powder is converted in the form of pellets or monoliths using a hydraulic press without the addition of adhesives. The carbonization process is carried out from room temperature to 600°C in an N2 gas environment, while the physical activation process is carried out from 600°C to a high temperature of 850°C in a CO2   gas environment. Density analysis was reviewed as an initial evaluation of porous carbon electrodes. Furthermore, the electrochemical properties of the supercapacitor were evaluated  through three different techniques including cyclic voltammetry (CV), galanostatic charge discharge (GCD) and electrochemical impedance spectroscopy (EIS) techniques in a two-electrode system in 1 M H2SO4 electrolyte. The results of the research have obtained carbon electrodes from cassava peel waste through chemical and physical activation processes. After testing the electrochemical properties of the supercapacitor electrode, the specific capacitance value of the supercapacitor cell on the chemical activator ZnCl2 with a concentration of 0.3 M and 0.7 M, respectively, was 196 F/g, 176.7 F/g in the CV method of 183.62 F/g, 147.64 F/g on the GCD method and 135 F/g, 126.6 F/g on the EIS method. These results confirm that the cassava peel has the potential to be used as a porous activated carbon for the base material for supercapacitor electrodes.
Effectiveness of adding ZnO thin films to metamaterial structures as sensors Saktioto Saktioto; Yan Soerbakti; Ari Sulistyo Rini; Budi Astuti; Erman Taer; Rahmondia Nanda Setiadi; Syamsudhuha Syamsudhuha; Sofia Anita; Yolanda Rati
Indonesian Physics Communication Vol 21, No 1 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.1.13-24

Abstract

Metamaterials are artificial materials with the characteristics of a negative refractive index and high resonance sensitivity. Advanced engineering in metamaterials can realize great potential in combination with zinc oxide (ZnO) semiconductor materials, which can increase the efficiency of sensor technology compared to other conventional material models. This research aims to investigate the optical properties and develop an invention for a hybrid sensor media based on a split ring resonator (SRR) metamaterial structure integrated with a thin layer of ZnO. The research methodology was carried out by simulation by designing and characterizing SRR metamaterials which were designed with variations in SRR patterns, geometry, substrate materials, unit cell configurations, and variations in the thickness of the ZnO thin layer. Geometry characterization of SRR metamaterials was carried out using the Nicolson-Ross-Weir electromagnetic (EM) field function approach, specifically the optical parameters permittivity, permeability, and refractive index. They are optimizing the performance of hybrid sensor components based on metamaterials and ZnO thin films using the GHz scale EM field function approach, especially in the reflection, transmission, and absorption spectrum. Analysis of metamaterial characteristics identifies the optical properties of permittivity, permeability, and negative refractive index which are increased and optimized from the thin layer integration model 200 nm thick ZnO in the SRR metamaterial structure with a 3×3 square pattern configuration at a resonance frequency of 1.889 GHz. The performance of the hybrid sensor media provides a resonant frequency of three equal bandwidths in the frequency range 2.89 – 3.52, 5.28 – 6.54, and 7.57 – 8.46 GHz. In addition, the highest absorption spectrum of 73% is at a frequency of ~8 GHz.
Exploration of Analyte Electrolyticity Using Multi-SRR-Hexagonal DNG Metamaterials and ZnO Thin Films Defrianto, Defrianto; Saktioto, Saktioto; Rini, Ari Sulistyo; Syamsudhuha, Syamsudhuha; Anita, Sofia; Soerbakti, Yan
Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Vol 13, No 2: June 2025
Publisher : IAES Indonesian Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52549/ijeei.v13i2.6085

Abstract

Advanced engineered metamaterials (MTMs) significantly contribute to modern technological advancements, particularly through hybridization with semiconductor materials like zinc oxide (ZnO), which enhance sensor sensitivity and performance. This study aims to investigate the optical properties of hybrid MTMs and develop a novel sensor medium capable of detecting early electrolytic behaviors of analytes. Utilizing the finite-difference time-domain (FDTD) method, the sensor was designed, characterized, and integrated, featuring a hexagonal multi-cell split ring resonator (SRR) structure coated with a 200-nm ZnO thin film. The geometry of the SRR MTM was optimized using a modified Nicolson-Ross-Weir electromagnetic field function method. Results demonstrate that the MTM exhibits double-negative optical characteristics with a performance index reaching 102. Moreover, the sensor presents dual-band resonance frequencies for reflection and transmission attributed to the combination of the multi-SRR hexagonal design and ZnO coating, with an absorption peak at 8.71 GHz. Testing the sensor in varying electrolytic conditions, such as seawater, revealed a measurable reduction in resonance depth and increased sensitivity, characterized by a frequency shift of 5.25 MHz per 0.7 S/m increment in electrical conductivity. These findings highlight the MTM sensor's potential as an effective tool for enhancing spectrum readout accuracy and sensitivity in analyte detection applications.
Developing Carbon Nanofibers from Gnetum Gnemon Linn Pericarp Using Dual Activators KOH And Melamine as Innovative Electrode Materials for Supercapacitors Farma, Rakhmawati; Putri, Hardini Chania; Apriyani, Irma; Azwat, Luqyana Adha; Awitdrus, Awitdrus; Deraman, Mohamad; Rini, Ari Sulistyo; Setiadi, Rahmondia Nanda; Taer, Erman
Journal of Engineering and Technological Sciences Vol. 57 No. 6 (2025): Vol. 57 No. 6 (2025): December
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2025.57.6.2

Abstract

Synthesis of carbon nanofibers from Gnetum gnemon Linn (GP) biomass with dual activators, KOH and melamine, offers a potential approach for high-performance supercapacitor electrodes. This study evaluated the preparation of GP-based carbon nanofibers through single and double activation, with varying melamine masses of 0.1, 0.3, and 0.5 g at 0.3 M KOH. The pyrolysis (integrated carbonization and physical activation) occurred at 600°C in N₂ and 800°C in CO₂ atmospheres. The material was activated using 0.3 g of melamine in 0.3 M KOH to produce abundant and highly amorphous nanofiber structures. These characteristics contributed to the high specific capacitance of 400 F/g at a scan rate of 1 mV/s and an energy density of 17 Wh/kg at a power of 465 W/kg. These results demonstrated the synergistic effect of melamine and KOH in increasing the active surface area and structural conductivity. This finding confirms the potential of GP biomass that has not been optimally utilized as a sustainable precursor for energy storage applications, especially supercapacitors.
Design and optimization of square SRR metamaterial-based microstrip antenna for wideband biomedical sensing Saktioto, Saktioto; Angraini, Cici Yana Tasya; Soerbakti, Yan; Rini, Ari Sulistyo; Syamsudhuha, Syamsudhuha; Anita, Sofia
Science, Technology, and Communication Journal Vol. 6 No. 1 (2025): SINTECHCOM Journal (October 2025)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v6i1.331

Abstract

The continuous advancement in wireless biomedical technology necessitates the development of compact, high-performance antennas capable of operating across a wide frequency range. In this context, this study reports the design and optimization of a square split-ring resonator (SRR) metamaterial-based microstrip antenna to enhance bandwidth and gain characteristics for wideband biomedical sensing. The proposed metamaterial, composed of one to four square SRR unit cells, was modeled using copper patches on an FR-4 substrate with a dielectric constant of 4.3 and simulated in CST Studio Suite 2019 over a frequency range of 0.009 – 9 GHz. The electromagnetic behavior of the structure was analyzed through S-parameter characterization, and the Nicolson–Ross–Weir (NRW) retrieval method was applied to extract the effective constitutive parameters, including relative permittivity, relative permeability, and refractive index. The optimized four-cell SRR configuration demonstrated double-negative (DNG) characteristics, exhibiting a relative permittivity of -153.65, a relative permeability of -8.85, and a refractive index of -9.48, thereby confirming the negative-index properties essential for enhanced electromagnetic field confinement and energy concentration. Integration of the optimized metamaterial into the microstrip antenna structure yielded significant performance improvement, achieving a return loss of -48.31 dB, bandwidth of 4.37 GHz, and gain of 2.23 dBi. These results substantiate that the square SRR metamaterial contributes to superior impedance matching and field localization, making the proposed antenna architecture highly promising for wideband biomedical sensing and potential internet of things (IoT) healthcare implementations.
Co-Authors Akrajas Ali Umar Akrajas Ali Umar Anggrid Fitrisia Angraini, Cici Yana Tasya Anita, Sofia Apriyani, Irma Arie Purnomo Aji Arisman Adnan Awitdrus Awitdrus, Awitdrus Azwat, Luqyana Adha Budi Astuti Defrianto Defrianto Ebigail Nur Tabita Tambunan Erman Taer Eva Wahyuni Harahap Farhan Lutfi Hazelina Adzani Herna Herna Ilham Yurestira Iwantono Iwan Barnawi Krisman Krisman Lazuardi Umar Maria Erna Maya Sari Miranti Agustin Mohamad Deraman, Mohamad Mohd. Ambar Yarmo Muhammad Feri Desfri Nurhayati, Nurhayati Ody Azis Saputra Putri, Hardini Chania Rahmi Dewi Rahmondia N. Setiadi Rahmondia Nanda Setiadi Rakhmawati Farma Rati, Yolanda Rita Meldayani Saktioto Saktioto Saktioto, Saktioto Santi T Sidabukke Shahidan Radiman Soerbakti, Yan Soerbakti, Yan Sofia Anita Sundami Restiana Syamsudhuha Syamsudhuha Tengku Emrinaldi Tengku Said Hussain Shahab Tetty Marta Linda Yan Soerbakti Yanuar Hamzah Yessi Meinarti Yolanda Rati