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All Journal Reaktor BERKALA FISIKA Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Sains Materi Indonesia Chem Info YOUNGSTER PHYSICS JOURNAL Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Bulletin of Chemical Reaction Engineering & Catalysis JITEK (Jurnal Ilmiah Teknosains) Indonesian Journal of Chemistry Journal of Physics and Its Applications Astonjadro Jurnal Pijar MIPA Bulletin of Chemical Reaction Engineering & Catalysis JURNAL REKAYASA KIMIA & LINGKUNGAN
Iis Nurhasanah
Department Of Physics, Faculty Of Science And Mathematics, Diponegoro University, Jl. Prof. Soedarto SH, Tembalang, Semarang 50275, Indonesia
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Energy Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Veterinary

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Journal : BERKALA FISIKA

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EVALUASI PERUBAHAN STRUKTUR AKIBAT SUBSTITUSI PARSIAL ION Mn +2 DAN ION Ti PADA M HEKSAFERIT BaFe 12-2X Mn MENGGUNAKAN ANALISIS RIETVELD Widiyanto, Widiyanto; Priyono, Priyono; Nurhasanah, Iis
BERKALA FISIKA Vol 14, No 3 (2011): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Cationic interaction of Mn+2and Ti +4substitution on conventional hexaferriteBaFe O have been studied using X-ray diffraction (XRD) and  analysis by the Rietveld method. These Research was conducted by combining compound of Fe O12 19 TiO2 to form  (Fe,MnTi)2O  phase3BaCO3 phase and heated at 1200. Then, Compound of (Fe,MnTi)0 C to form of BaFe12-2xresult of rietveld analysisshowed that the composition of Hexaferrite BaFe22 3, MnCO  and3O  phase mixed withMn Ti O3x x 19 compounds. The  as main phase and Fe2Oas a second phase. At all compositions showed that the largerfraction of ions Mn+23  and Ti+4 ions able to change latice parameter from  the volume unitcell of conventional hexaferrite. The results reatveld iteration of the phaseBaFe MnTiO (x = 1.0) obtained values of lattice parameters a = 5.9116 Ǻ and c =23.2532 Ǻ or shrinkage abaut 5,0 % volume unit cell and at  BaFe Mn Ti O10 19 (x=2.5)the volume unit cell 7,0% lower  than conventional hexaferrite.Keywords: Rietveld, unit cell, substitusi io,  hexaferrite, 12-2x7 2.5 2.5 19Mn Ti Ox x 19
PENGUKURAN PERMITIVITAS KOMPLEKS MATERIAL MAGNETIK MENGGUNAKAN METODE S-PARAMETER DENGAN PENDEKATAN NICOLSON ROSE-WEIR Priyono, Priyono; Abidin, Nur; Nurhasanah, Iis
BERKALA FISIKA Vol 22, No 2 (2019): Berkala Fisika Vol. 22 No. 2 Tahun 2019
Publisher : BERKALA FISIKA

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Dielectric properties of material are important properties because it describes the interaction of material with electromagnetic waves. The complex permittivity value of material is interesting because it can represent on how much energy savings and dissipation when the material gets exposed to electromagnetic waves. The aim of this paper was to determine complex permittivity by Nicolson-Ross-Weir (NWR) method. The NWR method was based on the phenomenon of reflection and transmission of electromagnetic wave that drip on materials. The values of the reflection coefficient () and the transmission coefficient (T) were derived from reflection (S11) and transmission (S12) parameters. Determination of real permittivity in the frequency range of 10 GHz to 15 GHz of BaFe12O19 material was ε ’ = 4.36 and ε ” = 6.23. The second sample was BaFe9 (MnCo)1,5Ti1,5O19, the values of ε ’ = 5.49, while ε ” = 9.35. From the two test materials, it was revealed that in the frequency range of 10 GHz to 15 GHz, absorption did not occur in BaFe12O19, while in BaFe9 (MnCo)1.5Ti1,5O19 absorption occured at 13.0 GHz.Keywords: Ferromagnetic, S-parameter, complek permittivity
SINTESIS LAPISAN TIPIS SENG OKSIDA DIDOPING PERAK (ZnO:Ag) DAN APLIKASINYA UNTUK PENDEGRADASI POLUTAN ORGANIK AIR Sutanto, Heri; Nurhasanah, Iis; Hidayanto, Eko
BERKALA FISIKA 2015: Berkala Fisika Vol. 18 No. 4 Tahun 2015
Publisher : BERKALA FISIKA

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Zinc Oxide (ZnO) is a semiconductor material that is used for photo-catalyst to degrade organic pollutants. The addition of doping silver (Ag) in ZnO can increase the photo-catalytic activity in the degradation process. In this study, the addition of doping Ag in ZnO thin film on a glass substrate deposition using thermal spray coating method has influence on the micro-structure and photo-degradation in presence of bacteria Escherichia coli (E. coli) as an organic pollutants has been investigated. Micro-structure of ZnO : Ag layer were characterized by Scanning Electron Microscopy (SEM) and photo-degradation activities of bacteria were tested with Total Plate Counter (TPC). The results show that doping Ag in ZnO give affect the topography of the surface that can increase in amount of grains and grain size in order to increase the photo-catalytic activity. It indicated by decrease in amount of E. coli bacteria from the initial sample with percentage of degradation is 99,99951% Keywords: Semiconductor, photo-catalyst, ZnO, doping Ag, micro-structure, photo-degradation
Sintesis Nanopartikel Cerium Oxide Menggunakan Metode Presipitasi dan Sifat Optiknya Nurhasanah, Iis; Sutanto, Heri; Muhlisin, Zaenul; Nurdianik, Sulistia; Nursanti, Ida
BERKALA FISIKA Vol 15, No 2 (2012): Berkala Fisika
Publisher : BERKALA FISIKA

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Cerium oxide nanoparticles have been synthesized using precipitation method in mixed-solvent system of aquades DM and isopropanol with volume rasio of 1:6.  Presipitation wascarried out by dropping amonium hidroxide to cerium nitrate hexahydrate solution until pH of 9. Precipitated was dried at temperature of 60oC for 2 hours and then calcined  for 2 hours attemperatur of 200oC, 300o and 400oC. Optical properties of cerium oxide nanoparticles werecharacterized using UV-Vis spectrophotometer. Cerium oxide nanoparticles exhibit goodtransparency in visible region and strong UV absorbance. These reults suggesting that ceriumoxide nanoparticles are potential as bionanomaterial for application in UV-blocker.Keywords: cerium oxide, nanoparticles, precipitation, UV filter, band gap energy, UV-Visspectrophotometer
STRUKTUR NANOKRISTAL CeO YANG DISINTESIS MENGGUNAKAN METODE PRESIPITASI DENGAN VARIASI LAMA WAKTU KALSINASI 2 Nursanti, Ida; Muhlisin, Zaenul; Sutanto, Heri; Nurhasanah, Iis
BERKALA FISIKA Vol 14, No 4 (2011): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Nanocrystalline CeO have been synthesized by using a precipitation method. in a mixedsolvent system of aqua DM and isopropanol. Precipited was calcined at temperature of 300 C forvarious calcination time.  X-ray difractometer was used to investigate resulting presipitedmicrostructure.  X-ray diffraction patterns were analyzed to study effect of calcination time tostructure and crystallite size. Refinement process of x-ray diffraction pattern was carried out byusing Rietveld method.  The results show that all of precipited were CeO  nanocrystalline withsingle phase of cubic fluorite.  The difference in lattice parameter was correlated to oxygenvacancy.  Crystallite size was found in the range 9 – 11 nm, its incresed as calcination timeincreased.   The increasing of calcination time did not significant influence to  crystallite size. These result indicated that CeO  nanocrystalline  exhibited weak-agglomeration.Keywords: CeO222, nanocrystalline, microstructure, x-ray diffraction, precipitation 2o
Pengaruh Laju Molar Mn Larutan Terhadap Mikrostruktur Lapisan Tipis GaN:Mn yang Dideposisi di atas Substrat Si Menggunakan Metode Sol-Gel Sutanto, Heri; Hidayanto, Eko; Nurhasanah, Iis; Istadi, Istadi
BERKALA FISIKA Vol 14, No 2 (2011): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

A thin layer of material deposition of GaN: Mn by sol-gel method has done using spin-coating technique. Solution of gallium-citrate-amine maganese-Ga2O3 synthesized using as a source of Ga and Mn MnO2 as the source. Solution varied with the mole fraction solution of 60-80% Mn. Brown crystals that formed subsequently dissolved in ethylenediamine to form a gel. Subsequent gel superimposed on top of Si substrates with a spin-coater at a rate of 1100 rpm. Layers formed at temperatures of 900oC and then disintering in UHP N 2 gas environment to form the decomposition of GaN: Mn. The results of spectral analysis of energy dispersive X-ray (EDX) showed incorporation of Mn into the GaN mole fraction increased with the addition of a solution of Mn in the solution used. EDX Test results show that thin films of GaN: Mn impurity contained carbon (C) up to 36.71%. Image scanning electron microscopy (SEM) a thin layer of GaN: Mn shows in general have been obtained surface roughness (rms) morphology of the layer reaches the order of nanometers up to 24.36 nm. From the results already obtained show that the sol-gel deposition method has been able to produce a thin layer of magnetic semiconductors with a nearly homogeneous surface morphology. Thus the sol-gel method could be developed for alternative methods of deposition of thin layers that are economical and simple. Key words: GaN: Mn, CSD, Thin Layer, Mn incorporation.
Mikrostruktur Semikonduktor GaN di Atas Substrat Silikon Dengan Metode Sol-Gel Sutanto, Heri; Nurhasanah, Iis; Istadi, Istadi; Maryanto, Maryanto; Ambikawati, Wahyu; Marlini, Nofi
BERKALA FISIKA Vol 13, No 2 (2010): Berkala Fisika
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Abstract

Gallium nitride (GaN) semiconductor thin films have been successfully deposited on Si substrate (004) by sol-gel method. Gel prepared from the crystal gallium-citrate-amines. These crystals formed from a solution containing the ions Ga+3 and citric acid (CA). Gel in place on the substrate and then rotated with a speed of 1100 rpm. The gel layers are obtained and then placed on the programmable furnace. Deposition temperature varied of 800, 900 and 1000oC in a nitrogen gas environment during 2 hour. The crystal quality of GaN thin films have characterized by XRD measurement. The surface morphology and cross section of the films observed by SEM. The film compositions determined by EDX characterization. The results showed that all the GaN thin films on silicon substrate have oriented polycrystalline structure. The crystal quality of GaN film is formed is influenced by the deposition temperature. In a deposition temperature range is used, increasing the deposition temperature can improve the crystal quality of GaN films.   Keywords: GaN Thin Films; Spin-Coating Technique; Silicon Substrate
KRISTALINITAS DAN UKURAN NANOPARTIKEL ZnO YANG DIKALSINASI PADA TEMPERATUR 100oC dan 200oC Hernowo, Alfian; Nurhasanah, Iis
BERKALA FISIKA Vol 22, No 4 (2019): Berkala Fisika Vol. 22 No. 4 Tahun 2019
Publisher : BERKALA FISIKA

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Abstract

The purpose of this researh is to analyze a crystalinity and size of zinc oxide (ZnO) nanoparticles. ZnO nanoparticles were synthesized using precipitation method followed by ultrasonic radiation. Precipitation products were calcined at temperature of 100oC and 200oC. ZnO nanoparticles were characterized using X-Ray Diffractometer (XRD) and Scanning Electron Microscope (SEM). The XRD pattern showed formation of ZnO nanoparticles with wurtzite hexagonal structure. ZnO nanoparticles with crystalinity higher than 50% was obtained at calcination temperature of 200oC. ZnO nanoparticles composed by a collection of crystallites that form spherical particle with size in the range 150–250 nm.Keywords: zinc oxide, nanoparticles, precipitation, crystal structure, crystallinity
ESTIMASI UKURAN KRISTAL DAN PARAMETER ELASTISITAS NANOKRISTAL ZnO:Ce MENGGUNAKAN METODE SIZE-STRAIN PLOT Kinasih, Diah Ayu Suci; Nurhasanah, Iis
BERKALA FISIKA Vol 23, No 2 (2020): Berkala Fisika
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The physical properties of nanocrystals depend on the crystallite size that correlates with the characteristics of the crystal structure. This research aims to estimate the crystal size and elasticity parameters of ZnO:Ce nanocrystals based on x-ray profile analysis using the sizestrain pot method. Nanocrystal of ZnO:Ce was synthesized using the precipitation method with a calcination temperature of 500 oC. X-ray diffraction measurements were used to analyze the crystal structure of ZnO:Ce. Identification of x-ray diffraction peaks revealed the formation of ZnO:Ce nanocrystals with hexagonal wurtzite structure and lattice parameter smaller than bulk ZnO. The crystal size of 112 nm and the correlation coefficient of 0.97 obtained from the sizestrain plot method is greater than the Scherrer formula. These results indicate that lattice strain contributes significantly to the broadening of the spectrum profile of x-ray diffraction peaks of ZnO:Ce nanocrystal.
ANALISIS PERMUKAAN NANOPARTIKEL FERIT SENG BERDASARKAN ADSORPSI ISOTERM GAS NITROGEN Kadarisman, Kadarisman; Nurhasanah, Iis
BERKALA FISIKA Vol 23, No 3 (2020): Berkala Fisika
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Abstract

This research aims to analyze surface characteristic of zinc ferrite nanoparticles based on the N2 adsorption isotherm. The morphology and size of zinc ferrite nanoparticles were observed using a scanning electron microscope. Analysis of N2 adsorption isotherm using the Brunauer- Emmett-Teller  equation  obtained  a  specific  surface  area  of  9.78  m2/g  and  mesoporous structure.    Zinc  ferrite  nanoparticles  were  composed  of  spherical  primary  particles  with  a diameter  of  67  nm.  The  size  of  the  nanoparticles  obtained  from  the  specific  surface  area analysis was greater than the scanning electron microscope image analysis. This finding shows that zinc ferrite nanoparticles are agglomerating to form larger secondary particles.Keywords: Zinc ferrite, nanoparticle, surface area, agglomeration 
Co-Authors . Istadi Abidin, Nur Ade Ika Susan Affandi Faisal Kurniawan Agus Bashori Agus Subagio Aldilla Lutfia Ali Khumaeni Andi Wibowo Kinandana Andi Wibowo Kinandana Anwar Usman Arkadea Pringgodani, Andra Arnelli Arnelli Bambang Ariwahjoedi Eko Hidayanto Eko Hidayanto Fajar Arianto Fajar Arianto Fatikasari, Tanty Fauzan Musthafa Gunawan Gunawan H Hadiyanto Hella Arofah Heri Sutanto Hernowo, Alfian Holyness Nurdin Singadimedja I. Istadi Isrina Nur Laili Kadarisman Kadarisman Karnaji Karnaji Karnaji, Karnaji Khairurrijal Khairurrijal Kinasih, Diah Ayu Suci Maman Budiman MARIA BINTANG Maryanto - Mikrajudin Abdullah Muhammad Nur Muhammad Nur Mukti, Nursanti Ajune Nasrullah, Faiz Ndaru Adyono Nofi Marlini Nursidi Yunanto Nurul Wahyu Puspaningrum P Priyono, P Pandji Triadyaksa Paramita, Safira Arta Pratama Jujur Wibawa Priyono Priyono Ririn Futikhaningtyas Rukmono, Dito Andi Rulhendri Rulhendri Sari Pratiwi Singgih Wibowo Sukirno Sukirno Sulistia Nurdianik Sumariyah Sumariyah Susanto Haryadi, Eri Syamsul Arifin Syifa Avicenna Tri Windarti Triadiyaksa, Pandji Ummi Kaltsum Very Richardina Very Richardina Wahyu Ambikawati Weni Safitri Widiyanto Widiyanto Yayuk Astuti Yunita Indriyani Zaenal Arifin Zaenul Muhlisin Zaenul Muhlisin