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All Journal Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Sains Materi Indonesia The Journal of Pure and Applied Chemistry Research JFA (Jurnal Fisika dan Aplikasinya) Omega: Jurnal Fisika dan Pendidikan Fisika InfoTekJar : Jurnal Nasional Informatika dan Teknologi Jaringan Science and Technology Indonesia Journal of Physics: Theories and Applications INDONESIAN JOURNAL OF APPLIED PHYSICS Spektra: Jurnal Fisika dan Aplikasinya PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
Saptari, Sitti Ahmiatri
Department Of Physics, Faculty Of Science And Technology UIN Syarif Hidayatullah Jakarta
Aerospace Engineering Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Physics Other

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Sintesis dan Karakterisasi Barium Heksaferit dengan Variasi Pengurangan Massa Fe2O3 Ryan Rizaldy; Sitti Ahmiatri Saptari; Wisnu Ari Adi
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.1
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (548.693 KB) | DOI: 10.15408/fiziya.v1i2.9504

Abstract

Barium Heksaferit berhasil disintesis dengan menggunakan metode solid state reaction, dalam upaya untuk menghasilkan fase yang tunggal, kami melakukan pengurangan massa dari Fe­2O3. Dimana kami mengurangi dengan komposisi tertentu, kami menggunakan faktor pengurangan x dengan variasi x = 1, 2, 3, dan 4. Hasil dari sintesis di karakterisasi menggunakan XRD untuk melihat fase-fase apa saja yang terbentuk. Hasil data XRD kami analisis menggunakan metode penghalusan Rietveld, dan mendapakan hasil dimana berkurangnya komposisi pengotor (dalam hal ini Fe2O3) pada hasil sintesis seiring dengan pengurangnya massa bahan baku Fe2O3
MICROWAVE ABSORBING PROPERTIES OF LaMn1-x NixO3. Sitti Ahmiatri Saptari; Azwar Manaf; Budhy Kurniawan
Jurnal Sains Materi Indonesia Vol 15, No 4: JULI 2014
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (230.577 KB) | DOI: 10.17146/jsmi.2014.15.4.4335

Abstract

MICROWAVE ABSORBING PROPERTIES OF LaMn1-x NixO3. The doped lanthanum manganites have unusual magnetic and transport properties, which makes it possible for this material to be used for microwave absorbing. In this study, LaMn1-xNixO3 (x = 0, 0.02, 0.04, and 0.06) were prepared by solid state reaction method as microwave absorption material. The crystal structure and magnetic properties were characterized byX-Ray Diffractometer (XRD) and Vibrating SampleMagnetometer (VSM), respectively. Refinement results of X-Ray diffraction pattern using High Score Plus Software showed that the samples with various x = 0 to x = 0.04 had a single phase with monoclinic crystal structure, while the sample with x = 0.06 had two phases with monoclinic and hexagonal structures. Hysteresis loops showed that the LaMn1-xNixO3 (x = 0, 0.02, 0.04, and 0.06) samples are soft magnetic materials. Microwave absorption properties were investigated in the frequency range of 8-12 GHz using Vector Network Analyzer (VNA). An optimal reflection loss of -8.85 dB is reached at 11.58 GHz for x = 0.04 with sampel thickness of 2 mm.
Dye Sensitized Solar Cell (DSSC) Efficiency Derived from Natural Source Muhammad Fajri Maulana; Elvan Yuniarti; Ai Nurlaela; Sitti Ahmiatri Saptari
Jurnal Fisika dan Aplikasinya Vol 17, No 3 (2021)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i3.9616

Abstract

Dye Sensitized Solar Cell (DSSC) with natural dye from Leunca fruit (Solanum Nigrym L) and Jamblang fruit (Syzygium Cumini L) extract as sensitizer has been created. This DSSC is composed of ZnO doping TiO2 using milling tool for 30 minutes which would be used as photoelectrodes. This study used two natural dyes which are Leunca and Jamblang fruit. The characterizations were performed to examine crystal structure of ZnO-TiO2 with XRD, to measure ZnO-TiO2 particle size with SEM, to examine optical properties from the dye using UV-Vis spectrophotometer, and to run an electrical test to find the efficiency from DSSC. The results indicate that the use of Jamblang fruit as sensitizer is better than Leunca fruit. This is because Jamblang fruit extract has light absorption area on the range of 250 - 800 nm which is higher absorbance than that of Leunca fruit. In addition, the milling time applied was found to be not long enough to produce semiconductor with smaller crystal size. The electrical test result shows Jamblang fruit based DSSC performance is better than Leunca fruit. The maximum power output values are 4.01 x 10−8 Watt with the efficiency of 22.57 x 10−4 % and 2.16 x 10−7 Watt with efficiency of 6.02 x 10−4 % when radiated with Halogen lamp and sunlight, respectively. Aside from the fact that the preparation technique is relatively easy, natural dye material can be found abundantly in nature and its price is also cheap, hence this study is very promising. However, several changes are needed to gain better results. The brief of this research is to develop alternative energy from solar energy, so that its use can be maximized as environmentally-friendly energy source.
Sistem Deteksi Banjir Dan Pintu Air Otomatis Menggunakan Raspberry Pi 3 Berbasis Website Ana Hasanah; Sitti Ahmiatri Saptari; Dewi Lestari
InfoTekJar : Jurnal Nasional Informatika dan Teknologi Jaringan Vol 4, No 2 (2020): InfoTekJar Maret
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/infotekjar.v4i2.2286

Abstract

Bendungan merupakan pusat pantauan utama bagi warga Jakarta mengenai air banjir yang akan dikirimkan dari bendungan tersebut. Informasi yang lambat mengenai kiriman air tersebut menyebabkan Jakarta sering mengalami banjir secara tiba-tiba hingga menimbulkan kerugian karena masyarakatnya tidak sempat untuk mengevakuasi barang-barang berharga mereka. Salah satu cara yang dapat dilakukan untuk meminimalisir kerugian dari banjir kiriman adalah dengan memberikan informasi dini sebelum terjadinya banjir. Penelitian yang dibuat kali ini bertujuan untuk memberikan informasi dini mengenai banjir kiriman yang dapat diakses melalui website dengan cara membangun alat pendeteksi yang dirancang pada Raspberry Pi 3 dengan menggunakan  dua buah sensor yaitu sensor HCSR-04 sebagai pengukur ketinggian air dan Motor Servo sebagai pengatur pintu air otomatis. Penelitian menghasilkan karakteristik sensor HCSR-04 dengan ketelitian 99.4% dan motor servo 00. Sistem ini memiliki kecepatan respon rata-rata 2 detik dari Raspberry Pi hingga ke website. Dengan adanya website ini masyarakat dapat mengetahui status ketinggian air dan waktu pembukaan pintu air secara realtime sebelum banjir memasuki wilayah mereka.
Perovskite Manganit Analysis Based on La0.7Ca0.3Mn1-xTixO3 (x=0, 0.1, 0.2, and 0.3) as Potential Microwave Absorber Material with Sol-Gel Method Fira Rizky; Sitti Ahmiatri Saptari; Arif Tjahjono; Deni Shidqi Khaerudini
Journal of Physics: Theories and Applications Vol 6, No 1 (2022): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v6i1.59142

Abstract

Electromagnetic wave is an energy flow in the form of electric and magnetic field as the technology development causes electromagnetic wave exposure level changes significantly and resulting an electromagnetic wave radiation that leads bad impacts on human health. In this case, manganite perovskite became an interesting topic of study that aims to produce material engineering to obtain a material with the best property as absorber. This study is based on lanthanum manganite La0.7Ca0.3Mn1-xTixO3 (  and ) using sol-gel method with the with a heating temperature in the oven of 200oC for 2 hours, calcination temperature of 600oC for 6 hours, and sintering temperature of 1000oC for 12 hours. The sample is characterized using X-Ray Diffraction (XRD) that shows the sample had succeeded to form single phase and had crystal cubic structure with space group p m -3 m, the substitution of Ti3+ions did not cause the structural changes, but it was marked with the changes of lattice parameter, unit cell volume and average crystallite size. Meanwhile Vector Network Analyzer (VNA) on the frequency range 8-12 GHz shows that the sample has ability to absorb microwave until 90.16% on 10.4 GHz frequency. Therefore, the material based on lanthanum manganite La0.7Ca0.3Mn1-xTixO3has the potential as the microwave absorber material.
Analysis Perovskite Material Absorber Based on Nd0.6Sr0.4MnxFe1/2(1-x)Ti1/2(1-x)O3 (x = 0, 0.1, 0.2) by Sol-Gel Method Fajar Arif Kurniawan; Sitti Ahmiatri Saptari; Arif Tjahjono; Deni Shidqi Khaerudini
Journal of Physics: Theories and Applications Vol 6, No 1 (2022): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v6i1.59122

Abstract

The purposes of this research is to synthesis Nd0.6Sr0.4MnxFe1/2(1-x)Ti1/2(1-x)O3 (x = 0. 0.1, 0.2) materials as electromagnetic wave absorber using the sol-gel method. Materials characterized using X-Ray Diffraction (XRD) to determine the phase formed and Vector Network Analyzer (VNA) to determine the ability or strength of absorption of electromagnetic waves. The result of  XRD material has a structure orthorhombic with space group P b n m (62-3), the substitution of Mn+3 ions on Fe+3 ions and Ti+4 ions causes a phase change of the material from when x  =0 in the absence of Mn+3 ions 2 phases are formed, while when Mn+3 is substituted 1 phase is formed. The result of VNA with a frequency range of 8 – 12 GHz shows that the material has the ability to absorb electromagnetic waves up to 98,22% at a frequency of 9,5 GHz when x = 0.2. Thus, the material synthesis Nd0.6Sr0.4MnxFe1/2(1-x)Ti1/2(1-x)O3 has been successfully synthesized and has the ability to absorb electromagnetic waves.
PENGARUH DOPING NI TERHADAP RESISTIVITAS SENYAWA LA0.67SR0.33MN1-XNIXO3 Utami Widyaiswari; Budhy Kurniawan; Agung Imaduddin; Sitti Ahmiatri Saptari
Spektra: Jurnal Fisika dan Aplikasinya Vol 1 No 2 (2016): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 1 Nomor 2, Desember 2016
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (401.581 KB) | DOI: 10.21009/SPEKTRA.012.08

Abstract

Abstrak Penelitian terhdap sifat listrik material lanthanum manganat telah dilakukan. Perubahan sifat listrik senyawa mixed valence manganites dipengaruhi oleh pemberian doping pada site La dan Mn. Dalam penelitian kali ini, senyawa La0,67Sr0,33Mn1-xNixO3 dibuat dengan metode sintesa sol gel. Senyawa yang dibuat kemudian dikarakterisasi dengan menggunakan X-Ray Diffractometer (XRD) untuk mengetahui struktur sampel, selanjutnya diuji dengan menggunakan cryogenic magnetometer untuk mengukur resistivitas sampel sebagai fungsi temperatur. Hasil karakterisasi XRD menunjukkan bahwa senyawa yang dibentuk memiliki struktur Rhombohedral dengan space group R-3c dan ukuran kristalit kurang dari 100 nm. Pemberian doping Ni tidak merubah struktur kristal namun berpengaruh terhadap penurunan parameter kisi kristal dan ukuran kristalit. Hasil pengukuran resistivitas menunjukkan bahwa senyawa yang diuji berperilaku sebagai isolator dan doping Ni meningkatkan resistivitas sampel. Kata-kata kunci: Resistivitas, mixed valence manganites, doping Ni, metode sol gel. Abstract Transport properties of lanthanum manganites have been studied. Mixed valence manganites material transport properties changed with doping at La and Mn site. In this study, La0,67Sr0,33Mn1-xNixO3 material was synthesized using sol gel method. These samples were characterized using X-Ray Diffractometer (XRD) to investigate the structure of samples. While the resistivity of samples as a function of temperature was measured using cryogenic magnetometer. XRD result showed that samples were having Rhombohedral structure with R-3c space group and crystallite size smaller than 100 nm. Ni doping have not changed crystal structure but decreased lattice parameter and size of the crystal. Resistivity measurement result showed insulator behavior of the samples and Ni doping enhanced the resistivity of samples. Keywords: Resistivity, mixed valence manganites, Ni doped, sol gel method.
ANALISIS KARAKTERISASI XRD SINTESIS MATERIAL La0,7Ca0,3(Mn,Co)O3 MELALUI METODE MECHANICAL ALLOYING Anggita Prasanti; Riser Fahdiran; Sitti Ahmiatri Saptari; Erfan Handoko
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 4 (2015): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2015
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 (685.602 KB)

Abstract

Perovskite manganites materials La0,7Ca0,3Mn1-xCoxO3 with x = 0 and x = 0.1 through mechanical alloying method to characterize x-ray difraction has been synthesized. Material consisting of La2O3, CaO, MnCO3, and Co3O4 mixing by high energy ball mill for 1 hour and produce a homogeneous mixture followed by calcination at 750 ° C and molding sample pellets and sintering at 1100 ° C for 3 hours and monoclinic crystal structure with lattice parameters for x = 0 a = 7.752 Å; b = 5.463 Å; c = 5.466 Å and 231.54 A3 cell volume with 39.27 nm crystal size and density ρ = 6.93 g / cm3, while for x = 0.1 a = 7.742 Å; b = 5.470 Å; c = 5.460 Å and 231.23 A3 cell volume with 40.29 nm crystal size and density ρ = 6.95 g / cm3 with x-ray diffraction measurements as a result. Specification phase as a resukt of qualitative analysis and crystal size as a result of quantitaive analysis explained that the substitution can be done. Keywords: perovskite manganites, mechanical alloying, High Energy Ball Mill, X-ray Diffraction, Monoclinic.
Analysis of crystal structure and reflection loss of material based on La0.7Sr0.3Mn1-x(Ni, Ti)x/2O3 (x=0.1, 0.3, and 0.5) applications for microwave absorbers Sitti Ahmiatri Saptari; Nada Hashida Lathifah; Arif Tjahjono; Deni Shidqi Khaerudini
Journal of Physics: Theories and Applications Vol 6, No 2 (2022): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v6i2.60178

Abstract

In this research, structural engineering of lanthanum manganite material based on La0.7Sr0.3Mn1-x(Ni,Ti)x/2O3 (x = 0.1; 0.3 and 0.5) was synthesized using the sol-gel method. The prepared samples were then characterized using X-ray Diffraction (XRD) and Vector Network Analyzer (VNA). X-Ray Diffraction (XRD) characterization results obtained a single. Substitution of Ni and Ti ions with a concentration of x = 0.1; 0.3; and 0.5 indicate that the formed sample has a rhombohedral structure with a space group R -3c, the presence of Ni and Ti ion substitution does not cause a change in the structure but there is a change in the lattice parameters and crystal size. Vector Network Analyzer (VNA) characterization in the range of 8 – 12 GHz produces the most optimal reflection loss intensity value of -11.8 dB at an optimal frequency of 10.58 GHz at a concentration of x = 0.5 with the ability to absorb microwaves of 93.39%. Thus the material La0.7Sr0.3Mn1-x(Ni,Ti)x/2O3 (x = 0.1; 0.3 and 0.5) can be used as a microwave absorbent material.
Properties of Bacterial Cellulose/Polyvinyl Composite Membrane for Polymer Electrolyte Li ion Battery qolby sabrina; Hilwa Kamilah; Christin Rina Ratri; Titik Lestariningsih; Sitti Ahmiatri Saptari
The Journal of Pure and Applied Chemistry Research Vol 12, No 1 (2023): Edition January-April 2023
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2023.012.01.663

Abstract

High ionic conductivity and more porous have extraordinary significance to solid polymer electrolyte in Li ion battery application. In this study, bacterial cellulose (BC) based polymer was modified by polyvinyl pyrrolidone (PVP) and polyvinyl acetate (PVA) to get composite solid polymer electrolyte. Blending the polymer host is one more approach to work on the morphology pore and electrochemical properties of polymer electrolytes. The slurry of BC is rich in fibers that contribute to forming the pore template of the solid electrolyte membrane. Polyvinyl work to make more pore and increases the polymer segmental ion lithium mobility. Pore morphology of BC PVA composite membrane homogeneously distributed by SEM observations. The presence of many pores makes the tensile strength of the BC PVA membrane lower, for use in solid electrolytes it does not affect battery performance. The presence of pores that contribute a lot to the absorption of electrolytes. Enhancement of the conductivity upon addition of salt is correlated to the enhancement of more pore of polymer electrolyte. The conductivity of BC PVA composite 8.45 x 10-7 Scm-1 higher than PVP at room temperature. In the future, PVA can be relied on to be a mixed material for solid electrolyte membranes based on cellulose.  
Co-Authors Adhika Junara Karunianto Agung Imaduddin Ahmad Firdaus Ana Hasanah Anggita Prasanti Anugrah Azhar Apriatin, Apriatin Arif Tjahjono Arif Tjahjono Arif Tjahjono Azwar Manaf Bagus Septyanto Bambang Prihandoko Betty Haifa Sarwono Budhy Kurniawan Christin Rina Ratri Deni Shidqi Khaerudini Dewi Lestari Dian Nurdiana Dwi Nanto, Dwi Elvan Yuniarti Erfan Handoko Fajar Arif Kurniawan Fajriah, Nurul Fira Rizky Haiqal, Amanda Hanuarjie, Baskan Hapitanur, Dinda Hilwa Kamilah Juli Hartati Kumila, Biaunik Niski Kurniawan, Budhy Kurniawan, Budhy Laksanawati, Wahyu Dian Lediliocza Lediliocza Loua, Lamin Rene Mar’ah, Mufidatul Muhammad Fajri Maulana Muhammad Umar Faruqi Mujadid Al-Rabi Nada Hashida Lathifah Nadhia Fairuz Syafira Nanang Sudrajat, Nanang Nur Fitriani Nuras, Muhammad Ishaq Nurlaela, Ai Pratama, Elfriani Dita Priambodo, Danang Pamungkas qolby sabrina Rahman, Ikhwan Nur Riser Fahdiran Ryan Rizaldy Sarah Aulia Slamet Priyono Taryana, Yana Titik Lestariningsih Tjahjono, Arif Utami Widyaiswari Widyaiswari, Utami Wisnu Ari Adi Yuniarti, Elvan Yuniarti, Elvan