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INDONESIA
INDONESIAN JOURNAL OF APPLIED PHYSICS
Published by Universitas Sebelas Maret
ISSN : 20890133     EISSN : 24776416     DOI : -
Core Subject : Science,
Astronomy Energy Materials Science & Nanotechnology Physics
Indonesia Journal of Apllied Physics provides rapid publication of short reports and important research in all fields of physics. Indonesia Journal of Apllied Physics publishes articles that are of significance in their respective fields whilst also contributing to the disclipline of physics as a whole. Articles should be submitted to the Editorial Office of Indonesia Journal of Apllied Physics through this site. Further information on submission is also available at this site
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Articles 267 Documents
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Sintesis dan Karakterisasi Nanofiber Komposit PVA/SiO2 dari Silika Sekam Padi Menggunakan Metode Electrospinning Iqbal Firdaus; Simon Sembiring; Junaidi Junaidi; Andrean Johandra; TB Ikhwan Rifansyah; Rizky Ponco Rahmadi; Oki Ade Putra
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i1.55730

Abstract

Telah berhasil dibuat membrane separator yang berpotensi diaplikasikan untuk baterai lihitum-ion, membrane separator digunakan untuk proses transfer ion dan mencegah terjadinya arus pendek. Dalam penelitian ini membrane separator PVA/SiO2 disintesis memggunakan metode electrospinning dengan variasi berat SiO2 (0, 0.6, 1.2, 2) wt%. SiO2 yang digunakan adalah hasil ekstraksi silika sekam padi. Pengaruh penambahan SiO2 pada PVA untuk meningkatkan karakteristik membrane diantaranya porositas, dan stabilitas pada suhu tinggi. Hasil membrane yang berhasil dibuat PVA, dan PVA/SiO2 membentuk serat nano dengan ukuran diameter serat semakin kecil ketika ditambahkan  SiO2 yaitu ~ 220 nm, ukuran diameter semakin kecil  meningkatkan porositas membrane dan meningkatkan kinerja membrane dengan stabilitas suhu 165 oC
3D Inversion of Gravity Data Modeling Using The Chi Fact Algorithm for Revealing Subsurface Structure in Semarang City Rina Dwi Indriana; Mochamad Aryono Adhi; Danastri L. P. Tampubolon; Sorja Koesuma
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i1.59295

Abstract

The interpretation of subsurface in the Semarang City with 3D inversion model using the Chi Fact algorithm has been carried out to reveal the subsurface especially related to the presence of groundwater basins. The gravity data model in this research uses 80 stations with a research area of 20 km2 which is specialized in the surrounding area of Kaligarang district. The results of the 3D inversion using the Chi Fact algorithm founded the distribution of subsurface rock density values in the Semarang City area ranging from 1.6 gr/cc to 2.98 gr/cc. The distribution of subsurface density values indicates the subsurface geological structure of the Semarang City area had a normal fault leading to the southeast.
The Simulation of Covid-19 Droplet Transmission with Hamiltonian Monte Carlo Method Mutia Delina; Irsyad Tio Majid; Ahmad Fauzan
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i1.53124

Abstract

Corona Virus 2019 (COVID-19) pandemic has impacted every sector in the world. This virus spread through the droplet and infected healthy people. The typical of virus transmission is through droplets from coughing and sneezing. This study developed a simulation to model a virus spread just after the infected was coughed or sneezed. In the simulation, humidity, wind velocity, and temperature were considered.  The simulation was conducted with Hamiltonian Monte Carlo, where was set a random initial velocity and angle for every 200 droplets with 500 iterations of each. The transmission data was derived from three groups: the age of 15 to 30 years old, 31 to 50 years old, 51 to 68 years old. At the age of 12 to 30 years, the droplet range and height were 3.13 meters and -0.77 meters. At the age of 31 to 50 years old, the droplet range and height were 3.22 meters and -0.83 meters. At the age of 51 to 68, the droplets range and height were 2.82 meters and -0.58 meters. The highest droplet range was from the age of 31 to 50 years old. Therefore, the age of 31 to 50 years old or the productive age was considerable with the highest risk in the droplet transmission and virus spread. This study can be adopted to consider the effective prevention in controlling the virus outbreaks.
Performance Characterization of 450 nm Visible Light Based Photoacoustic Imaging for Phantom Imaging of Synthetic Dye Contrast Agents Mahendra Kusuma Nugraha; Moh. Ali Joko Wasono; Mitrayana Mitrayana
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i1.49179

Abstract

Performance characterization of 450 nm visible light photoacoustic imaging has been carried out through phantom imaging of methylene blue (MB), methyl orange (MO), and methyl red (MR) dye solutions. The phantom was made of a nylon tube with a diameter of 5.0 mm (outside) and 4.6 mm (inside) having a height of 2.0 mm along with a 6×6 cm black galvanized aluminum plate as the background medium. The nylon tube was filled with each type of solution with varying molecular concentrations of 10, 25, 50 and 100 ppm. Twelve (12) phantom objects were imaged in an area of 10×10 cm. The visible absorption peak known from UV-Visible spectroscopy for each type of solution is at 664 nm (methylene blue), 465 nm (methyl orange), and 522 nm (methyl red). It was also known that the amplitude of PA emissions would increase proportionally to the concentration of dye molecules. Overall, methyl orange solutions had the highest photoacoustic emission amplitude distribution. The analysis showed that the ratio of inner diameter (ID) and wall thickness (WT) between the MB and MO phantom images to the original object were 1:0.83 and 1:0.74 (ID) and 1:3 and 1:1.5 (WT), respectively. On the other hand, the ratio of the outer diameter (OD) of the MR phantom image to the original object is 1:1.28. 
Capacitance Value Analysis of Composites of Activated Cashew Shells Charcoal and Iron Sand Muhammad Anas; Vivi Hastuti Rufa Mongkito; Mardiana Napirah; Suritno Fayanto; Amiruddin Takda; Reza Ariefka
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i1.59494

Abstract

This study aims to determine the use of iron sand extract and cashew nut shell activated charcoal in the capacitor manufacturing process and determine the effect of grain size on the capacitor capacitance with electrodes from a composite of iron sand extraction and activated charcoal from cashew nutshells. The sample preparation of cashew nutshell activated charcoal was carried out by carbonation and activation methods at a temperature of 700 0C and continued by extracting iron sand. The results of the iron sand extract were then crushed using a mortar, followed by varying the mass fraction of iron sand starting at 40%, 60%, and 80% for each particle size (60 mesh, 100 mesh, and 200 mesh). Then composite the iron sand extract and activated charcoal mixed for 4 hours, and added 0.7 mL of LiNO3 1M solution. The analysis showed that the highest specific capacitance was found in the 200 mesh grain size, namely 0.0695 F/g.
Kajian Literatur Karakteristik Lapisan Keramik Oksida yang Ditumbuhkan Diatas Paduan Zirkonium dengan Metode Plasma Electrolytic Oxidation Maman Kartaman Ajiriyanto; Anawati Anawati
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i1.49853

Abstract

Bahan Zircaloy-4 telah digunakan sebagai bahan kelongsong elemen bakar reaktor nuklir tipe pressurized water reactor, PWR. Kelongsong Zr-4 tersebut menghadapi kondisi temperatur dan tekanan tinggi, iradiasi neutron, dan penyerapan gas (hidrogen, oksigen).  Pada suhu dan tekanan tinggi, paduan Zr-4 mudah mengalami oksidasi dan kecepatan oksidasi meningkat pada suhu 800-1200°C. Upaya untuk meningkatkan ketahanan oksidasi kelongsong Zr-4 adalah pelapisan permukaan dengan metode seperti thermal spray, physical vapor deposition, cladding, heat treatment, dan chemical vapor deposition. Pada artikel review ini menggambarkan dan menjelaskan metode pelapisan alternatif yaitu plasma electrolytic oxidation (PEO) yang secara khusus diaplikasikan pada substrat zirkonium. Aspek lain yang dibahas adalah parameter proses yang mempengaruhi kualitas lapisan, dan karakteristik yang khas dari lapisan yang dihasilkan dengan metode PEO. Plasma electrolytic oxidation (PEO) merupakan metode pelapisan yang menjanjikan untuk menghasilkan lapisan oksida keramik dengan kekuatan mekanik dan termal yang tinggi. Proses PEO menggunakan peralatan yang sederhana dan bahan yang ramah lingkungan. Lapisan oksida zirkonium (ZrO2) yang terbentuk pada permukaan substrat Zr-4 mempunyai titik lebur sangat tinggi yaitu 2715°C dan tampang lintang neutron termal sangat rendah yaitu 0,18 barn. Karakteristik lapisan oksida keramik yang dihasilkan dipengaruhi oleh parameter proses PEO yaitu rapat arus, jenis dan konsentrasi elektrolit, bahan aditif pada elektrolit dll. Hingga saat ini, proses pelapisan metode PEO pada paduan Zirkonium (Zr) relatif belum banyak dibahas secara mendalam jika dibandingkan dengan logam lainnya seperti Al, Mg, dan Ti. Salah satu permasalahan yang masih dihadapi dalam pelapisan PEO terhadap substrat Zr-4 adalah porositas relatif tinggi dan jumlah fasa t-ZrO2 pada inner dan outer layer yang relatif rendah yang dapat mengurangi kekuatan mekanik dan ketahanan korosinya. Penyelesaian masalah untuk meningkatkan kualitas lapisan PEO adalah dengan optimasi parameter proses PEO yaitu rapat arus ,dan jenis dan konsentrasi elektrolit. Dalam kajian literatur ini didiskusikan strategi optimasi rapat arus, penggunaan variasi elektrolit, dan penambahan aditif pada proses PEO  untuk meningkatkan sifat mekanik dan korosi lapisan Modifikasi permukaan dengan proses PEO dapat diaplikasikan pada paduan zirkonium termasuk paduan Zr-4 sebagai komponen atau kelongsong bahan bakar reaktor nuklir tipe PWR. Metode PEO ini sangat potensial digunakan pada kelongsong Zr-4 untuk meningkatkan ketahanan oksidasi suhu tinggi dan meningkatkan efisiensi bahan bakar didalam reaktor nuklir.
Performance of Doped Montmorillonite on Photosensitizer Based Natural Dyes Gardenia Jasminoides Sri Mulijani; Komar Sutriah; Gustini Syahbirin; Shabrina Shabrina
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i1.54786

Abstract

Dye Sensitized Solar Cell (DSSC) is an electrochemical cell that is able to convert solar energy from light to electrical energy. This technology is needed by the world as a renewable and environment friendly energy. In this study, we evaluate the consideration of modification montmorillonite and Gardenia jasminoides dyes may achieve better performance of DSSC by manufactured DSSC with modified TiO2 semiconductors using montmorillonite (MMT) and Nafion. Performance of DSSC was determined by potentiometer. Atomic force microscope was used to evaluate the characteristic of DSSC. The UV-vis results revealed that the dyes which is extracted from the Gardenia jasminoides content crocin and quercetin compounds. Modification DSSC contains ratio of MMT: nafion (50:50) exhibited highest power conversion efficiency value of 0.8316%. Topography of surface ensured the dyes have occupied surface area and able to promote electron to higher energy.  However, MMT and nafion capable to enhance potential of dyes as photosensitizer in DSSC. 
Identifikasi Dugaan Situs Purbakala Menggunakan Metode Geolistrik Resistivitas Konfigurasi Wenner di Situs Alassumur, Kabupaten Bondowoso Juan Pandu Gya Nur Rochman; Amien Widodo; Thufeil Amr Adausy; Hanif Dhiyaz Ulhaq F
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): IJAP Volume 12 ISSUE 01 YEAR 2022
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i1.54349

Abstract

Penemuan struktur batubata kuno di Desa Alas Sumur, Kecamatan Pujer Kabupaten Bondowoso menjadi menarik untuk diteliti, karena selama ini Kabupaten Bondowoso umumnya berupa peninggalan zaman batu besar yaitu Situs Megalithikum. Tujuan penelitian ini adalah untuk identifikasi struktur batu bata di situs tersebut. Metode yang digunakan adalah metode geolistrik konfigurasi wenner yang dapat menggambarkan kondisi bawah permukaan dan dugaan stuktur batu bata berdasarkan perbedaan nilai resistivitas batuan. Jumlah Lintasan pengukuran sebanyak 4 lintasan, dengan panjang untuk lintasan 1,3, dan 4 sepanjang 48 meter dengan  spasi 1 meter sedangkan lintasan 2 sepanjang 96 meter dengan spasi 2 meter. Data hasil pengolahan berupa data penampang nilai resistivitas. Berdasarkan hasil pengolahan, didapatkan litologi batuan breksi, batuan andesit, dan lempung pasiran. Persebaran nilai resistivitas batuan breksi memiliki range nilai (34 – 101 Ωmeter), batuan andesit memiliki range (102 – 141 Ωmeter), batuan lempung pasiran memiliki range ( 26 – 33 Ωmeter), anomali terdeteksi dengan range nilai (19 - 25Ωmeter) sebagai batubata. Anomali tersebut terdapat pada lintasan 1, 3, dan 4. Penemuan anomali tersebut diharapkan dapat membantu pihak terkait untuk melakukan proses pengembangan selanjutnya.
Characterization of Magnetic Minerals of Iron Sand Pasia Nan Tigo Padang Beach Using X-Ray Diffraction (XRD) Ardilla Nofri Yuwanda; Riza Rahmayuni; Dwi Anisa Visgun; Anisa Rahmi; Hamdi Rifai; Letmi Dwiridal
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): IJAP Volume 12 ISSUE 01 YEAR 2022
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i1.51531

Abstract

The mineral extraction of iron sand from Pasia Nan Tigo Beach has been carried out. Iron sands in this area are widely spread and have decent potential but have not been used optimally. The iron sand of Pasia Nan Tigo Beach contains minerals that are indicated by the variation in susceptibility values of type 265.8×10-8m3/kg to 12,445.53×10-8m3/kg. Therefore, it is necessary to separate minerals from iron sand so that the minerals contained in them are known so that they are suitable for usability. The iron sand obtained is extracted using two magnets, namely a strong magnet and a weak magnet. The extraction results from iron sand still contain impurities to remove them, the sand is purified and then the sand extraction results are characterized using the XRD method. Content The type and structure of the mineral species found in the samples extracted from iron sand using strong magnets are Magnetite (Fe3O4) with Cubic structure, Hematite (α-Fe2O3) with Hexagonal structure, and Ilmenite (FeTiO3) with Hexagonal structure. While the use of weak magnets is Magnetite (Fe3O4) with Cubic structure, Hematite (α-Fe2O3) with Rhombohedral structure, and Ilmenite (FeTiO3) with Rhombohedral structure. Meanwhile, the non-magnetic mineral namely Quartz (SiO2), works as an impurity. The average crystal size using a strong magnet for PNT-B01 0-5 cm is 100.85 nm and a weak magnet is 49.36 nm, sample A06 30-35 cm uses a strong magnet of 88.25 nm and a weak magnet of 46, 80 nm, meanwhile sample B10 0-5 cm with a strong magnet of 109.22 nm and a weak magnet of 45.60 nm.
Sintesis dan Karakterisasi Struktur dan Sifat Magnet Nanokomposit Fe3O4@PEG:ZnO Astuti Astuti; ihda khaira; syukri Arief; Sri Rahayu Alfitri Usna
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 2 (2022): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i2.58514

Abstract

Fe3O4@PEG:ZnO nanocomposites were synthesized by the coprecipitation method with various of the samples were Fe3O4, Fe3O4@ZnO (1:1), Fe3O4@PEG: ZnO (1:2), and Fe3O4@ PEG: ZnO (1:3). The samples were synthesized with variation in the concentration of ZnO to Fe3O4. The concentration ratio of (Fe3O4:ZnO) were (1:1), (1:2), and (1:3). In addition, polyethylene glycol (PEG) is also used to prevent the agglomeration of Fe3O4. Sample characterization was carried out using X-Ray Diffraction (XRD), Transmission Electron Microscope (TEM), Fourier Transform Infrared (FTIR), Particle Size Analyzer (PSA), and vibrating Sample Magnetometer (VSM). The XRD patterns show that the sample is composed of Fe3O4phase and ZnO phase with crystal structure cubic and wurtzite respectively. The TEM image shows the formation of a core-shell structure where PEG: ZnO is the shell and Fe3O4 is the core. From the FTIR results, there are C-O and C-C bonds which indicate the formation of PEG, Fe-O bonds indicate the formation of Fe3O4 and Zn-O bonds indicate the formation of ZnO. Characterization with PSA obtained particle sizes of 33 nm, 23 nm, and 16 nm with particle size distributions of 25%, 50%, and 75% so that the average particle size is 24 nm. The VSM results show that Fe3O4@PEG: ZnO (1:2) nanocomposite has a high magnetic saturation of 66.58 emu/g, with superparamagnetic properties, which has the potential to be developed as a bioimaging material.

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