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Analysis of Superconductor of Nd1Ba2Cu3O7 and Nd3Ba5Cu8O18 Phases Using FTIR Spectrophotometer Putra Adnyana, IGA; Sumadiyasa, Made; Wendri, Nyoman
BULETIN FISIKA Vol 21 No 2 (2020): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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I has been synthesized superconducting materials of the Nd1Ba2Cu3O7, Nd3Ba5Cu8O18 and Y3Ba5Cu8O18 phases. The study was conducted to determine whether the data from the phase Y1Ba2Cu3O7 can be used as a base to identify superconducting material of the Nd3Ba5Cu8O18 phase. Synthesis was done by solid state reaction method with initial mixing in HNO3 solution mixture with Y2O3, Nd2O3, BaCO3, and CuO, with the ratio adjusted to the stoichiometry calculation. Samples in the form of pellets with a diameter of 1.5 cm were sintered at 950 oC for 24 hours in an atmospheric environment. The FTIR measurements have been carried out with a standard KBr. The theoretical calculation spectra and vibration mode data from YBa2Cu3O7-d can be used to identify Nd1Ba2Cu3O7, Nd3Ba5Cu8O18 dan Y3Ba5Cu8O18, with peak absorption in the range of wave numbers that are almost the same, namely 400-450 cm-1, which is the four oxygen atoms O(2,3) mode, 426-439 cm-1 is the in-phase mode of oxygen atom O(2,3), and the vibrational mode of peaks O(4) is observed at 488 cm-1.

Sistem Pendeteksi Banjir Berbasis Sensor Ultrasonik Hc-Sr04 Dan Modul Esp8266-12e Dengan Media Komunikasi Telegram Dan Buzzer Hanan Hanan; Anak Agung Ngurah Gunawan; Made Sumadiyasa
Kappa Journal Vol 5, No 1 (2021): Juni
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v5i1.1622

It has been designed the water surface level detection system based on the ultrasonic sensor HC-SR04 and the ESP8266-12E module through telegram and buzzer communication media.. The research aims to design a water surface-level detection system by using ultrasonic sensors and the ESP8266-12E module. The tools and materials used during the design are: Ultrasonic sensors HC-SR04, module ESP8266-12E, and buzzer as an output to sound the alarm. The ultrasonic HC-SR04 sensor will detect the water surface level, the detection data will be sent to the ESP8266-12E module, then the system will send the information in the form of a message through telegram and buzzer application. The messages delivered are several stages including standby, alert, and danger. The methods used in this design are planning, study libraries, collection of tools and materials, hardware plan, and program creation on the software. The final result is a system capable of detecting water surface level based on the ultrasonic sensor HC-SR04 and the ESP8266-12E module through telegram and buzzer communication media. The success rate of this tool system at several stages among others at a standby of 77%, at a level of alert of 70%, and the level of success at the hazard level is 83%.

BIOSINTESIS NANOPARTIKEL PERAK MENGGUNAKAN EKSTRAK DAUN SAMBILOTO: OPTIMASI PROSES DAN KARAKTERISASI Nyoman Wendri; Ni Nyoman Rupiasih; Made Sumadiyasa
Jurnal Sains Materi Indonesia Vol 18, No 4: JULI 2017
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

BIOSINTESIS NANOPARTIKEL PERAK MENGGUNAKAN EKSTRAK DAUN SAMBILOTO: OPTIMASI PROSES DAN KARAKTERISASI. Pada penelitian ini telah berhasil disintesis nanopartikel perak (AgNP) dengan metode biologi (biosintesis). Sintesis dilakukan dengan menggunakan ekstrak daun Sambiloto (Andrographis paniculata Ness). Penelitian ini meliputi penentuan rasio volume sintesis (larutan AgNO3:larutan ekstrak) yang optimum dan karakterisasi nanopartikel perak yang terbentuk. Konsentrasi larutan AgNO3 yang digunakan 1 M dan larutan ekstrak adalah 7,5 g/L. Karakterisasi meliputi spektrofotometer UV-Vis, EDS, TEM, XRD dan FTIR. Hasil penelitian menunjukkan bahwa rasio volume sintesis optimum adalah 10 µL:10 mL. Karakteristik nanopartikel perak yang diperoleh adalah absorbsi surface Plasmon resonance (SPR) pada panjang gelombang 423 nm. Puncak-puncak difraksi teramati pada sudut 2θ yaitu 38,180, 45,810 dan 64,870, yang bersesuaian dengan bidang hkl: (1 1 1), (2 0 0) dan (2 2 0). Data tersebut menunjukkan bahwa nanopartikel perak yang terbentuk memiliki struktur kristal face centre cubic (FCC) dengan parameter kisi a sebesar 4,03 Å. Hasil karakterisasi dengan TEM diperoleh ukuran partikel sekitar 10-30 nm. ABSTRACT BIOSYNTHESIS OF SILVER NANOPARTICLES USING SAMBILOTO LEAF EXTRACT: OPTIMIZATION PROCESS AND CHARACTERIZATION. It has been synthesized silver nanoparticles (AgNP) with biological method or biosynthesis, successfully. The synthesis is done using extract of Sambiloto leaf (Andrographis paniculata Ness). The study involved determining the optimum volume ratio of synthesis i.e. AgNO3 solution:extract solution and characterization of nanoparticles formed. The concentration of AgNO3 solution used was 1 M and extract solution was 7.5 g/L. The characterization included UV-Vis spectrophotometer, EDS, TEM, XRD and FTIR spectrophotometer. The results obtained were, the optimum volume ratio of synthesis was 10 µL:10 mL. The characteristics of AgNP formed were the Surface Plasmon Resonance (SPR) absorbance at a wavelength of 423 nm. The diffraction peaks observed at angles 2θ of 38.180, 45.810 and 64.870 which corresponded to the hkl (1 1 1), (2 0 0) and (2 2 0). These results showed that the crystal structure of AgNP formed was face center cubic (FCC) with lattice parameter a, of 4.03 Å. TEM characterization showed that the size of AgNP nanoparticles was about 10-30 nm.

PREPARATION, CHARACTERIZATION AND USED OF POLYSULFONE MEMBRANES FOR THE TREATMENT OF WATER SOLUTIONS CONTAINING HUMIC ACIDS Ni Nyoman Rupiasih; Made Sumadiyasa; A.A. Ratnawati; Hery Suyanto
Jurnal Sains Materi Indonesia VOL 13, NO 1: OKTOBER 2011
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

PREPARATION, CHARACTERIZATION AND USED OF POLYSULFONE MEMBRANES FOR THE TREATMENT OF WATER SOLUTIONS CONTAINING HUMIC ACIDS. Polysulfone (PSf) membranes were cast by phase inversion method using PSf as matrix, N,N-Dimethylacetamide (DMAc) as solvent and distilled water as coagulant. The microporous membrane has studied using Scanning Electron Microscope (SEM) and filtration techniques. The filtration experiments were performed on a flat sheet membrane using pure water and humic acids (HA) solution as feeds. The results show, the Pure Water Flux (PWF) and Product Flux (PF) values decrease with increasing thickness of the membranes. They are consistent with the SEM images that thicker membranes have smaller pore size and less in numbers. The Rejection coefficient (R) values showthat the membranes are able to filter HA in the form of solution, with the performance dependent on the characteristics: thickness and microporous structure. They were increased with increase in the thickness of the membranes and with increase in the wavelength from 250-665 nm. It suggests that, the PSf membranes can be used to minimize the amount of Humic Acids from water process to improve the quality of treated to an acceptable quality level.

PEMANFAATAN KOTORAN SAPI SEBAGAI BAHAN BIOGAS SKALA RUMAH TANGGA ANGGOTA SUBAK BANYUMATI DESA UMA ANYAR SERIRIT BULELENG P. Suardana; M. Sumadiyasa; W. G. Suharta; A. A. Ngr. Gunawan; K. N. Suarbawa
Buletin Udayana Mengabdi Vol 16 No 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Telah dilakukan sosialisasi kepada anggota masyarakat Subak Banyumati Desa Uma Anyar mengenai dampak yang diakibatkan oleh polusi gas metana yang dihasilkan dari kotoran sapi dan telah melakukan usaha pemberdayaan anggota masyarakat Subak Banyumati untuk mengembangkan sistim pertanian terintegrasi antara pertanian, peternakan, dan pemanfaatan teknologi untuk meningkatkan nilai tambah kotoran sapi melalui pelatihan “Pemanfaatan Kotoran Sapi Sebagai Bahan Biogas Skala Rumah Tangga”. Dengan terlaksananya program pengabdian masyarakat ini anggota masyarakat Subak Banyumati mampu membuat instalasi biogas skala rumah tangga hingga menghasilkan gas metana dan mengoprasikannya untuk memasak. Dengan demikian masyarakat Desa Ume Anyar pada umumnya dan anggota masyrakat Subak Banyumati pada khususnya mampu memanfaatkan kotoran sapi sebagai bahan biogas dan mampu membuat pupuk kompos dalam waktu yang lebih cepat dari sebelumnya, serta yang tidak kalah pentingnya adalah masyarakat berkontribusi mengurangi polusi udara oleh gas metana.

Sintesis Carbon Dot Dengan Bahan Dasar Asam Sitrat Menggunakan Metode Pemanasan Secara Berulang di Dalam Oven Microwave G. Agus Permana Putra Sujana; Made Sumadiyasa; Isnaeni Isnaeni
BULETIN FISIKA Vol 22 No 1 (2021): BULETIN FISIKA February Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2021.v22.i01.p05

Abstrak â€“ In this research, a carbon dot has been synthesized using citric acid and polyethylene by heating repeatedly in the microwave. The results of the synthesis were characterized by UV-Vis, FTIR, Photoluminescence (PL) and TRPL spectroscopy. The UV-Vis characterizations show that the sample has shown two peaks with the wavelength 200-280 nm and ~330 nm. This marks the pÂ®p* and nÂ®p* excitation transitions which are characteristic of the carbon dot. FTIR characterization has shown the presence of O-H strain vibration bands, C=O aromatic carbonyl, C-O strain and sulfate strain vibration frequencies on wave numbers 3292, 1623, 1129 and 996 cm-1, respectively. From the PL characterization using excitation laser beams of 320, 420 and 530 nm (violet, blue and green) obtained that the carbon dot samples produced radiation emission at wavelengths of 453, 525 and 590 nm, respectively. The TRPL calculation results show that the average lifetime of the photoluminescence is in the order of 10-9 s, which is characteristic of fluorescence photoluminescence. These results show that a carbon dot has been successfully synthesized with radiadifferent emission characteristics depends on the laser beam.

Analysis of Superconductor of Nd1Ba2Cu3O7 and Nd3Ba5Cu8O18 Phases Using FTIR Spectrophotometer IGA Putra Adnyana; Made Sumadiyasa; Nyoman Wendri
BULETIN FISIKA Vol 21 No 2 (2020): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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

I has been synthesized superconducting materials of the Nd1Ba2Cu3O7, Nd3Ba5Cu8O18 and Y3Ba5Cu8O18 phases. The study was conducted to determine whether the data from the phase Y1Ba2Cu3O7 can be used as a base to identify superconducting material of the Nd3Ba5Cu8O18 phase. Synthesis was done by solid state reaction method with initial mixing in HNO3 solution mixture with Y2O3, Nd2O3, BaCO3, and CuO, with the ratio adjusted to the stoichiometry calculation. Samples in the form of pellets with a diameter of 1.5 cm were sintered at 950 oC for 24 hours in an atmospheric environment. The FTIR measurements have been carried out with a standard KBr. The theoretical calculation spectra and vibration mode data from YBa2Cu3O7-d can be used to identify Nd1Ba2Cu3O7, Nd3Ba5Cu8O18 dan Y3Ba5Cu8O18, with peak absorption in the range of wave numbers that are almost the same, namely 400-450 cm-1, which is the four oxygen atoms O(2,3) mode, 426-439 cm-1 is the in-phase mode of oxygen atom O(2,3), and the vibrational mode of peaks O(4) is observed at 488 cm-1.

Determining Crystallite Size Using Scherrer Formula, Williamson-Hull Plot, and Particle Size with SEM Made Sumadiyasa; I.B.S. Manuaba
BULETIN FISIKA Vol 19 No 1 (2018): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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It has been determined the crystallite size by XRD technique using Scherrer equation and Williamson-Hull Plot method. While the particle size is determined by SEM using Image-J software. For this purpose, synthesized samples of compound Gd0,95La0.05Ba2Cu3O7-d phase. From the calculation results, obtained the crystallite size in nanometers order, however the crystallite size resulting from the Scherrer equations and Scherrer Modified is different, i.e. 63.1675 nm and 67.0005 nm. The results of the crystallite size calculation by the scherrer equation directly and modified differed from that of the Williamson-Hull Plot method (97,3040 nm). Meanwhile, the results of the Williamson-Hull Plot methods and SEM show almost the same value (98.7297nm).

SINTESIS SUPERKONDUKTOR SISTEM (Bi,Pb)Sr(Y,Ca)CuO BERFASE 1212 DENGAN METODE PELELEHAN M. Sumadiyasa; Ni N. Rupiasih; P. Suardana
BULETIN FISIKA Vol 13 No 2 (2012): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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Superconductors system BPSCCO 1212 phase have been synthesized by solid state reaction with melting methods. The schedules: calcining at 9000C during 10 h, making of pellet, melting at 10100C for 0.1 h, cooling (cooling rate 350C/h) to 9800C, and sintering at 9800C during 5, 10, 20, and 30 h. From measurement of XRD, all of the sample has showed to be formed of Bi-1212 phase. The highest volume fraction reach 91,23 % given by sample which is sintering at 9800C during 10 h. The spectrum pattern show reflection of its 00l extremely high intensity, showing the existence highly textured which as according to the typical behaviour for materials with the c-axis lying normal to the surface plane. The resistivity as function of temperature, that sample not yet shown the existence of Tc0, not yet had the superconducting properties at temperature above 77 K. The SEM shows morphology of surface, showing the existence of the stacking of plate-like. Analyse EDX at some spots observation, show elements distribution of Bi, Pb, Sr, Y, Ca and Cu nearly homogenous, and its ratio of the spots on grain have been nearly the composition of 1212 phase.

Jarak Pisah Sudut Puncak Difraksi Antara Bidang (hkl) Utama Sebagai Indikator Keorthorhombikan Struktur Kisi Kristal Fase GdBa2Cu3O7-? I Komang Wahyu Surya Permana; Made Sumadiyasa; Windarjoto Windarjoto
BULETIN FISIKA Vol 22 No 1 (2021): BULETIN FISIKA February Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2021.v22.i01.p06

The orthorombicity of a crystal lattice structure is indicated by the difference in lattice parameter values ??a, b and c. This study aims to show that the split distance value between the angles of the diffraction peaks of the two planes (hkl) closest is the same as the orthorombicity value crystal structure on the GdBa2Cu3O7-? phase. For this purpose, in this study, a compound Gd0,85La0,15Ba2-xSrxCu3O7- has been synthesized with variations of x = 0.00, 0.05, 0.10, 0.20, 0.30 and 0.50. Samples were synthesized using a solid reaction method with wet mixing, sintered at a temperature of 900Â°C for 12 hours. From the results of XRD spectrum analysis with Match-3 and Rietica software, it is found that by the increasing the content of Sr the pattern of changes in the value of the split distance the angles of the diffraction peaks of (hkl) planes closest, the measurement and calculation results are the same with the changing pattern of the orthorombicity value. The measurement and calculation results, the split distance value between the diffraction peaks angle for the plane of (020) and (200) is almost equal to one-tenth of the orthorombicity value. Thus, the split distance value between the angles of the diffraction peaks of the two (hkl) planes closest can be used as an indicator of the orthorombicity a GdBa2Cu3O7-? phase crystal structure.

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