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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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Pengaruh Ketebalan Elektroda Kerja TiO2 Transparan terhadap Kinerja Dye Sensitized Solar Cell (DSSC) sebagai Aplikasi Solar Window Nadya Aruma Dewi; Fahru Nurosyid; Agus Supriyanto; Risa Suryana
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 6, No 02 (2016): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v6i02.1362

Abstract

 Senditized Dye Solar Cells (DSSC) consist of photoelectrode, dye, electrolyte and counter electrode which is one of the photochemical electric cells. In this article will discuss the influence of the thickness of the electrode on the electrical properties. Electrodes made by screen printing method. Screen by type T-49. TiO2 deposited on the FTO variation of the number of layers to obtain a thickness of 1, 2, 3 and 4. DSSC tested thickness by Screen Electron Microscopy (SEM), absorbance test by UV Visible Lambda 25 and characterization of current and voltage test by Keithley Measurenment 2602A. The test results showed the thickness of the TiO2 electrode thickness (1.5 ± 0.2) μm, (2.9 ± 0.5) μm, (3.5 ± 0.6) μm, and (4.5 ± 0.8 ) μm. Based on the test results absorbance maximum value contained in thickness (4.5 ± 0.8) μm having a dye adsorbed at most and have the highest efficiency  2.41%. 
Pengaruh temperatur sintering terhadap struktur dan sifat magnetik La3+ - barium nanoferit sebagai penyerap gelombang mikro Siti Uswatun Hasanah; Wahyu Widanarto; Sunardi Sunardi
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v7i2.14978

Abstract

Seri La3+-barium nanoferit telah dibuat melalui metode solid-state reaction termodifikasi tanpa sintering dan dengan sintering pada temperatur 600, 800 dan 1000 °C. Pengaruh temperatur sintering terhadap komposisi, struktur, ukuran kristal, sifat magnetik dan kemampuan menyerap gelombang mikro dari La3+-barium nanoferit dikarakterisasi masing-masing menggunakan XRD, VSM dan VNA. Hasil karakterisasi menunjukkan bahwa La3+-barium nanoferit yang di-sintering pada 600 ºC mempunyai kemampuan menyerap gelombang mikro yang paling baik, dengan rata-rata nilai reflection loss sebesar -16,2165 dB pada frekuensi 10,86 GHz. Ferit terdiri dari tiga fasa kristal yaitu BaLa2Fe2O7, BaFe11.9O19, dan Fe21.33O32 dengan nilai Hc yang rendah 231,65 Tesla. Hal ini menunjukkan bahwa temperatur sintering sangat berpengaruh terhadap La3+-barium ferit sebagai penyerap gelombang mikro.
Effect of Guided Discovery learning model in mastering of Force and Motion subject Parno P
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 5, No 02 (2015): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v5i02.276

Abstract

This research aims to describe students’ mastering of the basic concept about Force and Motion through the Guided Discovery learning model. This research uses pre-experimental one-group pretest-post test design. The research subjects are 25 students in sixth semester in the physics education department who are taking the Capita Selecta of School Physics course. This research uses the Basic Concept Mastering about Forceand Motion Test, and the Students Response Questionnaire for Learning Process instruments. The test data is analyzed using an average normalized gain secure, andthe question naire data are analyzed descriptively. The results show that student (1) has an average of mastering of the basic concept 75.38, an average normalized gain score of individual 0.556 that is smaller than an average normalized gain score of class 0.568 (medium category), and (2) gives a positive response for the learning process, namely 58.33% agree and 38.22% strongly agree, on the Force and Motion topic.
Study of Macrobending Losses Effect in Plastic Optical Fibber. Egyn Furqon Ghozali; Mohtar Yunianto; Nuryani N
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 01 (2014): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i01.1166

Abstract

Experimental study to analyze the effect of macrobending losses in plastic optical fiber triple bending model based on PC (personal computer) has been conducted. The data is gathered by measuring the change of the light intensity due to the presence of bending on optical fibers. The bending causes losses of optical fiber that is read by WIM (weight in motion) Acquisition program based on Borlan Delphi 7. The optical fibers are plastic with diameter of 3 mm. The diameter of pin is 8 mm and the space between the pin is 5 mm. The light source is a LED (λ=676 nm). As a result, the losses of optical fiber increase with the enhancement of bending. The increase trend linear to sensitivity of the sensor with gradient of 0,1063 and R2 of 0,9626. Therefore, the proposed design might be applied as a WIM sensor.
Efek Annealing Temperture Terhadap Sifat Magnetik Dan Struktur Multilapisan Tipis Cobalt-Samarium Erwin E
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 3, No 01 (2013): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v3i01.1238

Abstract

Multilayer thin films of cobalt and samarium with the structur of 20[Co (4.2 nm)/Sm (3.8 nm)] have been fabricated using dc magnetron sputtering technique. Crystalline formation due to heat treatment of about 450oC of the sample is responsible for increase of coercivity from 300Oe to 3500 Oe. Due to heat treatment (annealing) of the sample caused the value of the magnetization of the sample decreases. This is due to the formation of none magnetic phase ininterfacial mixing between the layers as a result of inter-diffusion between the layers. Structural properties of as deposited and annealed samples was studied using transmission electron microscope (TEM). Electron diffraction patterns for as deposited sample exhibit diffused rings for samarium reflection however, for the annealed sample of about 450oC for 30 minutes produces sharp diffraction rings. This indicates that alloys of CoSm in interfacial mixing has a crystalline properties. By modifying the annealing temperature and time one can obtain higher value of coercivity of alloy of CoSm between the layers as one of therequirements for higher density magnetic recording media.
Pengaruh Penggunaan Binder terhadap Densitas dan Kalor Pembakaran Briket dari Limbah Sagu Hendri Widiyandari; Wahyu Setiabudi; Agus Subagio; Sri Haryanti; Parsaoran Siahaan; Heru Tjahjana
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 3, No 02 (2013): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v3i02.1270

Abstract

Biomass fuel such as briquette is one of an alternative energy regarded to the shortage of the fosil fuel and rising its prices. The byproduct of sago starch industry is the waste that remain the environmental problem because of the odor. However this agricultur waste such as trunk cortex and fibre has a potential application as a raw material for briquette.The fibre and trunk cortex act as matrix material of briquette. The utilizing of sago waste as a biomass briquette and the effect of ratio of matrix/binder to the density, time of compustion and gross heat of the briquette have been elucidated sistematically. The analyzing of gross heat using adiabatic calorimetry indicated that the briquette prepared with the ratio of binder/matrix of 3:4 (mass ratio) had the maximum value of 3929.5 kal/g. The duration of combusion was proposional with density of the briquette.
Studi Katalis Ni Nano pada Material Penyimpan Hidrogen MgH2 yang Dipreparasi melalui Teknik Mechanical Alloying Nirmala Sari; Adi Rahwanto; Zulkarnain Jalil
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 6, No 01 (2016): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v6i01.1788

Abstract

The main obstacle which hinders the application of fuel cell fuels in motor vehicles today is the hydrogen storage tubes. One of the latest efforts in hydrogen storage research is to insert hydrogen in certain metals or called solid state hydrogen storage. Magnesium (Mg) is regarded as one of the material potential candidates absorbing hydrogen, because theoretically, it has the ability to absorb hydrogen in the large quantities of (7.6 wt%). This amount exceeds the minimum limit which is targeted Badan Energi Dunia (IEA), that is equal 5 wt%. However Mg has shortage, namely its kinetic reaction is very slow, it takes time to absorb hydrogen at least 60 minutes with very high operating temperatures (300-400 °C). The aim of this study is to improve the hydrogen desorption temperature hydrogen storage material based MgH2. In this method, milling of material is done in the time of 10 h with the variation of catalyst inserts a for 6wt%, 10wt% and 12 wt%. The results from XRD measurements in mind that the sample was reduced to scale nanocrystal. Phase that appears of the observation of result XRD is MgH2 phase as the main phase, and followed by Ni phase as minor phase. The result of observations with DSC, to the lowest temperature obtained on the sample with a weight of catalyst 12 wt% Ni catalyst that is equal to 376 °C. These results successfully repair pure temperature of Mg-based hydrides.
Estimasi Kedalaman Bitumen Batubara di Desa Banjaran Kecamatan Salem Kabupaten Brebes Berdasarkan Data Anomali Magnetik Sehah S; Sukmaji Anom Raharjo; Adi Chandra
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 02 (2014): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i02.4986

Abstract

The Estimation of coal bituminous depth in Village of Banjaran, District of Salem, Regency of Brebes based on magnetic anomaly data has been done. The Village of Banjaran is located in the geology basin which called as Bentarsari Basin. The activities stages that carried out in this research include of magnetic data acquisition in the field, data processing, and interpretation. The interpretation of the anomalies data is done through the modeling using the Mag2DC for Window software on the local magnetic anomalies data. Based on this modeling results, then obtained six anomalous objects that can be interpreted as the subsurface rocks in the research area, which consists of sediments of gravel, sand, clay, and silt ( = 0.0020 cgs units); tuff and tuffaceous sandstone ( = 0.0069cgs units); andesite breccia, tuff, and tuffaceous sandstone ( = 0.0085cgs units); solid andesite breccia which not layered ( = 0.0115 cgs units); coarse sandstones, limestones, and sandy marl ( = 0.0109cgs units); andesite sandstone that layered with claystone and thin insertions of new coal bituminous alternately ( = 0.0008cgs units). Based on the modeling results and the geological information of this research area, it can be estimated that the coal bituminous found in the Kaliglagah formation, with its depths ranging between 104.48 m – 505.97m, and the value of the magnetic susceptibility is 0.0008 cgs units.
Pembuatan Ba0,8Sr0,2TiO3 menggunakan Metode Co-precipitation dengan Variasi Suhu Sintering Isma Alvia Nita; Yofentina Iriani; Fahru Nurosyid
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 1 (2017): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v7i1.1776

Abstract

Ba0,8Sr0,2TiO3 was made by co-precipitation method with the sintering temperature of 600oC, 700oC, 800oC and 900oC for 4 hours. Sintering temperature was varied to investigate its effect on microstructure and dielectric constant of Ba0,8Sr0,2TiO3. microstructure characterization was performed by X-Ray Diffraction (XRD) instrument. Dielectric constant characterization was perform by LCR meter. The crystal size increased significantly with increasing sintering temperature. Measurements of dielectric constant were performed at range of frequency 0.01 to 100 KHz. Dielectric constant value is highest at the lowest frequency. Dielectric constant value size increased significantly with increasing sintering temperature.
Back Matter Vol 06 No 02 2016 Mohtar Yunianto
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 6, No 02 (2016): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v6i02.19966

Abstract

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