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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 INDONESIAN JOURNAL OF APPLIED PHYSICS Spektra: Jurnal Fisika dan Aplikasinya Communications in Science and Technology PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)

Saptari, Sitti Ahmiatri

Department Of Physics, Faculty Of Science And Technology UIN Syarif Hidayatullah Jakarta

Author-ID : 660990

Aerospace Engineering Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering 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

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

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

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

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.

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

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)

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 Â° C and molding sample pellets and sintering at 1100 Â° C for 3 hours and monoclinic crystal structure with lattice parameters for x = 0 a = 7.752 Ã…; b = 5.463 Ã…; c = 5.466 Ã… and 231.54 A3 cell volume with 39.27 nm crystal size and density Ï = 6.93 g / cm3, while for x = 0.1 a = 7.742 Ã…; b = 5.470 Ã…; c = 5.460 Ã… and 231.23 A3 cell volume with 40.29 nm crystal size and density Ï = 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.

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

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.

Sintesis dan Analisis Struktur Material Aktif Katoda LiFe0,7Mn0,2Ni0,1PO4 Betty Haifa Sarwono; Sitti Ahmiatri Saptari; Bambang Prihandoko
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 | DOI: 10.15408/fiziya.v1i1.8998

Abstrak. Sebuah sintesis material katoda LiFe0,7Mn0,2Ni0,1PO4 dengan metode solid-state telah selesai dilakukan. Bahan dasar yang digunakan adalah LiOH.H2O, α-Fe2O3, MnO2, Ni dan H3PO4. Bahan yang digunakan ada yang berasal dari bahan baku lokal yaitu α-Fe2O3 dan MnO2 dan sisanya menggunakan bahan import dari china. Pada penelitian ini digunakan variasi waktu sintering yaitu 4 jam, 6 jam,8 jam dan total 10 jam dengan temperatur 800oC. Karakterisasi dilakukan dengan menggunakan pengujian Difraktometer Sinar-X (XRD). Analisis data XRD dilakukan dengan menggunakan perangkat lunak PDXL Rigaku. Hasil analisis menunjukkan bahwa sintering pada temperatur 800oC selama total 10 jam menghasilkan fasa LiFe0,7Mn0,2Ni0,1PO4 yang satu fasa. Dan co-doping Mn dan Ni berhasil didoping pada LiFePO4. Abstract. Synthesis Cathode material, LiFe0,7Mn0,2Ni0,1PO4, has been synthesized by the solid-state method. Basic materials that used in this research are LiOH.H2O, α-Fe2O3, MnO2, Ni, and H3PO4. Several basic materials that used in this research obtained from the local raw material such as α-Fe2O3 and MnO2, and the remaining materials obtained by importing from China. Sintering time in this research are varied from 4 hours, 6 hours, 8 hours, and 10 hours, and all varied time are treated at 800°C. The characterization that used in this research is X-Ray Diffractometer (XRD). XRD data are analyzed using PDXL Rigaku software. The results of this research show that sintering at 800°C during total time 10 hours yields LiFe0,7Mn0,2Ni0,1PO4 in one phase. Co-doping Mn and Ni had been successfully doped in LiFePO4.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v1i2.9504

Library Visitor Noise Monitoring System Design With Warning Using LED and Telegram Nur Fitriani; Sitti Ahmiatri Saptari; Elvan Yuniarti
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.6, N
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v6iI.34280

Abstract. The library supports education and is used as a place to learn and gain knowledge. To maximize its use, visitors need comfort by not making noise or upheaval that can disturb other visitors. According to the decision of the Ministry of Environment in 1996, the maximum standard for noise levels in libraries is 55 dB. This research was conducted to design a tool that can monitor the noise that occurs in the library by providing information on room conditions usingLED (Light Emitting Diode) lights, LCD (Liystal Displayquid Cr), and giving notifications to librarians in the form of messages on the Telegram application if the noise exceeds the limit. maximum. The tool is designed using ESP32 as a control, a GY-MAX4466 sensor to detect sound, and the output system uses red, yellow, and greenLED (Light Emitting Diode), LCD (Liquid Crystal Display) 16x2, and the Telegram application. The results of this study concluded that the noise monitoring system was running well, with a GY-MAX4466 sensor error rate of 0.4%, and the best R Square value was obtained at a distance of 1 meter from the sound source with an R Square value of 0,7202.

Co-Authors Adhika Junara Karunianto Admi, Ratna Isnanita Agung Imaduddin Ahmad Firdaus Ana Hasanah Anggita Prasanti Apriatin, Apriatin Arif Tjahjono Arif Tjahjono Arif Tjahjono Aulia, Sarah Azhar, Anugrah 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 Hadiyawarman 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 Manawan, Maykel T 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 Ryan Rizaldy Slamet Priyono Taryana, Yana Titik Lestariningsih Tjahjono, Arif Utami Widyaiswari Widyaiswari, Utami Wisnu Ari Adi Yuniarti, Elvan Yuniarti, Elvan

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