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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 351 Documents
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Hubungan Sifat Optik terhadap Performa Kinerja Sel Surya DSSC Transparan Berbahan Dye DN-F01 sebagai Sensitizer Agus Supriyanto; Ari Handono Ramelan; Mohd Khairul Bin Ahmad; Febrina Ramadhani; Diani Galih Saputri
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 10, No 2 (2020): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v10i2.46261

Abstract

Dye sensitized solar cell (DSSC) is the third generation of solar cells that currently developing by researchers to get the best performance. The selection of dye as a component of DSSC has a big influence in the light absorption process. In this study, DN-F01 organic dye was used as a sensitizer with various concentrations. The optical properties test was carried out on the DN-F01 dye solution by UV-Vis spectrophotometer (Shimadzu UV-1800) and the DSSC fabricated performance was tested by portable solar simulator (ORIEL Sol1A). From the results, the DN-F01 absorbance has ability to absorb light in the 300-500 nm wavelength range. The greatest efficiency value in this research is 2.44% obtained from the sample was immersed with the largest concentration of dye DN-F01 which has the smallest band gap energy of 2.38 eV.
Vertical to Horizontal Spectral Ratio (VHSR) Response of Seismic Wave Propagation in a Homogeneous Elastic – Poroelastic Medium Using The Spectral Finite Element Method Sudarmaji Saroji; Budi Eka Nurcahya; Nivan Ramadhan Sugiantoro
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 11, No 1 (2021): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v11i1.45969

Abstract

Numerical modeling of 2D seismic wave propagation using spectral finite element method to estimate the response of seismic waves passing through the poroelastic medium from a hydrocarbon reservoir has been carried out. A hybrid simple model of the elastic - poroelastic - elastic with a mesoscopic scale element size of about 50cm was created. Seismic waves which was in the form of the ricker function are generated on the first elastic medium, propagated into the poroelastic medium and then transmitted to the second elastic medium. Pororoelastic medium is bearing hydrocarbon fluid in the form of gas, oil or water. Vertical and horizontal component of velocity seismograms are recorded on all mediums. Seismograms which are recorded in the poroelastic and second elastic medium show the existence of slow P compressional waves following fast P compressional waves that do not appear on the seismogram of the first elastic medium. The slow P wave is generated when the fast P wave enters the interface of the elastic - poroelastic boundary, propagated in the poroelastic medium and is transmited to the second elastic medium. The curves of Vertical to horizontal spectrum ratio (VHSR) which are observed from seismograms recorded in the poroelastic and the second elastic medium show that the peak of VHSR values at low frequency correlated with the fluid of poroelastic reservoir. The highest VHSR value at the low frequency which is recorded on the seismogram is above the 2.5 Hz frequency for reservoirs containing gas and oil in the second elastic medium, while for the medium containing water is the highest VHSR value is below the 2.5 Hz frequency.
Konfigurasi Cekungan Barito Kalimantan Selatan Berdasarkan Analisis Data Gayaberat Eddy Mirnanda
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 10, No 2 (2020): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v10i2.27076

Abstract

Cekungan Barito agak lonjong dengan poros utama berarah Timurlaut - Baratdaya. Penampang cekungan tidak simetris, sayap bagian timur terjal sedang sayap barat relatip datar. Tepat di bagian poros utama cekungan dengan nilai anomali sekitar -25 mGal, batuan dasar Granit sebagai batuan dasar berumur pra-Tersier mencapai kedalaman kurang lebih 11 km di bawah permukaan. Di bagian cekungan ini, diisi batuan sedimen Tersier Tua setebal 5 km dan sedimen Tersier Muda diatasnya setebal 6 km. Ke arah timur sedimen Tersier Muda makin menipis dan diakhiri oleh kemunculan sedimen Tersier Tua akibat seretan intrusi batuan beku. Ke arah barat, nilai anomali gayaberat Bouguer naik secara perlahan mencapai +40 mGal, kemungkinan batuan dasar Granit makin mendekati permukaan sekitar 6 sampai 7 km, diatasnya ditindih oleh sedimen Tersier Tua dengan tebal 5 km yang tertutup oleh sedimen Tersier Muda setebal 1 sampai 2 km.Berdasarkan analisis model rapat massa bawah permukaan diperoleh bahwa sedimen berumur Tersier dan pra-Tersier dengan rapatmassa masing-masing 2,20 gr/cm3 dan 2,40 gr/cm3 merupakan lapisan paling atas, kemudian disusul oleh batuan dengan rapatmassa 2,68 gr/cm3 sebagai cerminan batuan dasar Granitik dan 3,10 gr/cm3 mewakili Mantel Atas. Selain itu batuan Ultrabasa yang tersingkap di bagian pegunungan Meratus yang memiliki rapatmassa 2,90 gr/cm3 yang menumpang di atas batuan Granitik dan diterobos oleh batuan intrusi Granit dengan rapatmassa 2,72 gr/cm3.
Analisis Proses Ekstraksi pada Nano Kafein Terhadap Konsentrasi Kafein Terbuang pada Molecularly Imprinted Polymer (MIP) dan Rongga Tercipta Jumatul Rahmayani; Maimuna Maimuna; Jorena Bangun; Idha Royani
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 11, No 1 (2021): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Molecularly Imprinted Polymer (MIP) nano kafein telah disintesis menggunakan metode cooling-heating dengan melibatkan kafein sebagai analit, Methacrylic Acid (MAA) sebagai monomer fungsional, Benzoil Peroksida (BPO) sebagai inisiator reaksi, Ethylene Glycol Dimethacrylac (EDMA) sebagai pengikat silang dan kloroform sebagai pelarut. Nano kafein diperoleh dengan mengubah kafein ke dalam skala nanopartikel menggunakan alat High Energy Milling (HEM) jenis Shaker Mill-miller 1st selama 10 menit. Ukuran partikel berdasarkan karakterisasi menggunakan XRD adalah sebesar 19,029 nm. Kemudian polimer nano kafein digerus dan dilakukan pencucian berulang untuk membuang kafein dari polimer. Berdasarkan hasil FTIR, terjadi penurunan konsentrasi pada gugus penciri kafein yakni N-H, C-N, dan C=O yang dapat dilihat berdasarkan kenaikan persen transmitansi akibat proses pencucian pada MIP nano kafein. Untuk mengetahui jumlah dan ukuran rongga sebagai tempat yang ditinggalkan kafein maka MIP di karakterisasi menggunakan SEM dan dianalisis menggunakan software porediz dengan bantuan Matlab. Hasilnya menunjukkan bahwa jumlah dan ukuran rongga yang terbentuk pada MIP nano kafein sebanyak 233 rongga pada ukuran rongga di bawah 100 nm. Artinya penggunaan analit dalam skala nano dapat memberikan peluang tercipta rongga yang lebih banyak. Jumlah dan ukuran rongga yang tercipta ini akan meningkatkan selektivitas MIP dalam aplikasinya.
Two Dimensional Modeling of Basaltic Rocks Intrusion Based on The Local Magnetic Anomalies Data in Jatilawang District Banyumas Regency Sehah Sehah; Sukmaji Anom Raharjo; Urip Nurwijayanto Prabowo
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 10, No 2 (2020): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v10i2.41885

Abstract

Two dimensional modeling to basaltic rocks intrusion in Pekuncen and Karanglewas Villages Jatilawang District, Banyumas Regency, Central Java based on the local magnetic anomalies data has been carried out in March – June 2020. The amount of magnetic data obtained from the acquisition in the field was 239 data stretching in position of 109.107222° – 109.134944°E and 7.561361° – 7.577306°S, with the local magnetic anomalies values ranging of -2,961.11 – 1,516.31 nT. To model anomalous sources in the subsurface in two dimensions, then the local magnetic anomalies data is transformed into pseudogravity anomalies data, so that anomalous value can be obtained as -27.815 – 41.087 mGal. Based on the pseudogravity anomalous map, the basaltic rock intrusion is interpreted to be located in the eastern part of the research area, so modeling of anomalous sources is conducted in this area. The results of 2D-modeling to local magnetic anomalies data indicate the presence of anomalous object interpreted as basaltic rock intrusion with magnetic susceptibility contrast value of 0.0223 cgs, located at depth of 52.61 – 505.97 m and a lateral length of 1777.94 m. This rock intrudes sediment rock from the Halang Formation and is connected to other basaltic rock near the surface with magnetic susceptibility contrast value of 0.0165 cgs, located at depth of 1.94 – 80.90 m and lateral length of 751.83 m. The results of lithological interpretation are in accordance with the geological information of the research area.
Analytical Solution to FRW Metric with Variable Speed of Light Gabriel W. Joseph; Terkaa Victor Targema; M. O. Kanu
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 11, No 1 (2021): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v11i1.47318

Abstract

According to the principle of general covariance, the laws of physics are the same in all reference frames. The controversial theory of the Varying Speed of Light (VSL) contradicts the principle of general covariance. Fortunately the VLS theory explains some crucial issues in cosmology such as Lorentz variance, biometric theories, locally Lorentz variance, cosmological constant problem, horizon and flatness problems. Also, recent astronomical observations from quasar show that the fine structural constant depends on redshift and therefore, varies with cosmological time. In other to harness this fascinating and published knowledge, two models where used in this work.  1. Cosmology with variables c; here the Friedmann-Robertson-Walker (FRW) is used in the Einstein field equation with variable c and Λ terms to obtain the scale factor, which shows the continuous exponential expansion of the universe. 2. Variation of the speed of light as a function of the scale factor of the universe; here we obtained: a good approximation to estimate the current age of the universe. The scale factor of the universe depends its content given by the equation of state parameter ω. We obtained the deceleration parameter in terms of the Hubble parameter. We arrived at a conclusion that the universe was decelerating at ω = 1, accelerating at ω = 1/3 and the Hubble parameter diverges at the beginning and end of the universe.
Identifikasi Batuan Pondasi Candi (Andesit) di Bawah Permukaan Sekitar Candi Badut dengan Metode Geolistrik Resistivitas Ahmad Luthfin; Husni Cahyadi K; Jufri Jufri
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 10, No 2 (2020): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v10i2.41384

Abstract

Situs Candi Badut diprediksi memiliki pondasi yang melebar persegi empat untuk menopang bangunan inti candi agar tidak ambles. Situs Candi Badut berdasarkan bentuk fisik bagian atas, susunannya kurang lengkap, sehingga dimungkinkan masih terdapat sisa–sisa batuan yang memenuhi fungsi utuh dari candi tersebut masih terkubur. Berdasarkan asumsi tersebut maka kegiatan penelitian kali bertujuan untuk mengindentifikasi batuan pondasi Candi Badut dan batuan andesit yang terkubur disekitar bangunan candi. Metode yang digunakan adalah metode geolistrik resistivitas, metode ini sering digunakan untuk melakukan investigasi bawah permukaan bumi, karena metode geolistrik resistivitas dapat menentukan jenis dan struktur batuan tanpa harus menggali, hanya berdasarkan sebaran resisitivitas dibawah permukaan. Alat yang digunakan adalah Resisvitimeter OYYO MC OHM lengkap beserta elektrodanya. Konfigurasi untuk susunan elektrodanya menggunakan konfigurasi wenner karena konfigurasi tersebut dianggap mampu memperoleh data yang lebih teliti dibandingkan dengan konfigurasi lainnya. Berdasarkan hasil penelitian pada keseluruhan interpolasi lintasan 1,2,3 dan 4 dengan metode geolistrik resistivitas menggunakan konfigurasi wenner dapat diketahui bahwa batuan pondasi candi (andesit) berada pada kedalaman 0,5-1,5 m,yang merupakan batuan dengan nilai resistivitas terbesar dibandingkan batuan yang lainnya dengan nilai resistivitas batuan kisaran antara 33,87 Ωm-66,8 Ωm, sedangkan pada kedalaman 1,51m-7,91m terdiri dari tanah lanau basah lembek dan tanah lanau, pasiran, tidak ditemukan batuan candi (andesit) yang terkubur didalam tanah.
A Study of Anti-Radiation Weaving Fabric with Plasma Corona Treatment Valentinus Galih Vidia Putra; Irwan Irwan; Ichsan Purnama; Juliany Ningsih Mohamad; Yusril Yusuf
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 11, No 1 (2021): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v11i1.40833

Abstract

In this research, Carbon black particles were applied on the woven fabric by the knife coating technique and pretreatment using plasma corona discharge to build-up conductive cotton-polyester (CVC 50%) fabric electromagnetic shielding material. This paper describes the making of anti-radiation weaving fabric using plasma technology. The anti-radiation patch was developed by first modifying the textile fabric's surface using atmospheric pressure plasma technology using tip-cylinder electrode configuration. The plasma corona discharge was generated using high voltage electricity with asymmetrical electrodes (tip and cylinder). The treated weaving fabric using plasma was then coated with carbon black ink. This research indicates that an anti-radiation weaving fabric was successfully shielded electromagnetic radiation from an electronic device.
Karakterisasi Muatan Nanopartikel Silika (SiO2) dengan Metode Elektroforesis Purwoko Haryadi Santoso; Yohanes Kurniawan; Havid Noor Pamungkas; Suparno Suparno
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 11, No 1 (2021): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v11i1.48326

Abstract

Electrophoresis is one of the experimental methods employed in this study to characterize unique properties of charges of silica nanoparticles (SiO2) by observing their electrophoretic phenomena while they are situated in the electric field. This study is aimed to measure one of the SiO2 properties, namely the charge, using electrophoresis method through the variation of electric fields. The charge dependencies of SiO2 was probed towards five times variation of electric fields 1000, 1250, 1500, 1750, and 2000 V/m in 20 mL of aquades. The displacement of SiO2 could be observed through the light microscope with 160x magnification which the recorded observations then were analyzed by timeline-based software to measure the displacement time of particles during the observation. The results revealed that silica nanoparticles have the kind of positive charges in the colloidal solution. It is caused the magnitude of SiO2 charges is ranged constantly despite the variational effect of electric field in the environment. Light microscope has been optimized in this study to measure the velocity of SiO2 that tends to increase with respect to the magnifying electric fields given in the experiment.
Pengaruh Doping Nikel dan Suhu Sinter pada Pembuatan Kawat Superkonduktor Magnesium Diborida Satrio Herbirowo; M Nur Hanafi; Agung Imaduddin; Edy Priyanto Utomo; Hendrik Hendrik; Aditya Trenggono; Erlina Yustanti
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 10, No 2 (2020): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v10i2.34984

Abstract

Peningkatan sifat superkonduktor MgB2 melalui penambahan doping telah banyak dilakukan. Meskipun begitu, pembuatan kawat superkonduktor MgB2  belum secara optimal dihasilkan akibat porositas yang terbentuk dari struktur lapis MgB2. Tujuan penelitian ini adalah untuk menganalisis efek penambahan doping nikel terhadap nilai kristalinitas dan kepadatan serta temperatur optimum dalam sintesis kawat superkonduktor berbasis MgB2. Variabel proses pada sampel yang digunakan yaitu variasi persen berat doping Nikel dan temperatur sintering. Karakterisasi   yang   digunakan   meliputi   Xray   Diffraction   (XRD),   Scanning   Electron Micoscope-Energy Dispersive Spectroscopy (SEM-EDS), dan Cryogenic Magnet. Pembuatannya menggunakan proses metalurgi serbuk dengan metode powder in tube secara in-situ dan manufaktur pengerolan kawat. Pengerolan dilakukan reduksi ukuran diameter 6 mm menjadi 4 mm, serta panjang awalnya 10 cm menjadi ±26 cm. Dari hasil XRD menunjukkan bahwa sampel dengan doping nikel menghasilkan fasa primer MgB2  dan fasa sekunder MgNi2.5B2  serta beberapa pengotor (MgO dan Mg) dengan ukuran kristalit lebih meningkat dibandingkan MgB2 tanpa doping. Dari gambar SEM, sampel tampak menunjukkan penurunan jumlah porositasnya. Sampel yang disinter 750°C merupakan temperatur optimal dalam  mensintesis superkonduktor MgB2   yang  didoping nikel  karena  memiliki  Tc  onset tertinggi sebesar 42,53 K dan porositas terendah pada pendopingan nikel sebesar 20 persen berat yaitu sebesar 13,5% porositas.

Page 18 of 36 | Total Record : 351

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