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All Journal Jurnal Ilmu Dasar Jurnal Sains Materi Indonesia IPTEK The Journal for Technology and Science Journal of Mathematical and Fundamental Sciences JFA (Jurnal Fisika dan Aplikasinya) Jurnal Fisika FLUX INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Pengabdian Pada Masyarakat Indonesian Journal of Chemistry Communications in Science and Technology Jurnal Ilmu Fisika SEMAR Prosiding University Research Colloquium Bulletin of Chemical Reaction Engineering & Catalysis

Budi Purnama

Department Of Physics, Faculty Of Mathematics And Natural Sciences, Universitas Sebelas Maret, Jl. Ir. Sutami 36A Kentingan Surakarta 57126

Author-ID : 349063

Agriculture, Biological Sciences & Forestry Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Social Sciences Other

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Ketergantungan Mobilitas pada Temperatur Pengukuran Lapisan Porphyrin Alam Elly Fatmawati; Utari Utari; Budi Purnama; Kamsul Abraha
Jurnal Fisika dan Aplikasinya Vol 10, No 3 (2014)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Efek temperatur terhadap mobilitas lapisan porphyrin alam diproduksi dengan metode deposisi spin coating di atas substrat Cu didiskusikan. Analisis pembawa muatan dilakukan dengan menggunakan metode pengukuran I-V dari temperatur T = 20C hingga T = 23C. Hasil eksperimen menunjukkan bahwa efek agitasi thermal meningkatkan arus terukur. Mobilitas meningkat secara linier dengan kenaikan temperatur pengukuran. Akhirnya, respon kenaikan nilai mobilitas terhadap temperatur pada sampel dengan N = 14 lebih cepat dibandingkan N = 8.

Pengaruh Medan Magnet pada Pembawa Muatan Lapisan Klorofil Spirulina sp Hasil Spin Coating Septinia Qoirun Nisa; U Utari; Budi Purnama
Jurnal Fisika dan Aplikasinya Vol 12, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Pengaruh medan magnet pada pembawa muatan lapisan Spirulina sp hasil spin coating melalui pengukuran I-V dilaporkan pada makalah ini. Hasil pengukuran magneto konduktansi menunjukkan bahwa medan yang diperlukan untuk mencapai nilai arus terukur konstan pada sampel B lebih kecil dari sampel A. Hal ini mengindikasikan bahwa mekanisme rekombinasi pasangan pembawa muatan disumbang oleh tingkat kemurnian. Akhirnya rasio MC 37,4% dan 50,6% diperoleh untuk masing-masing sampel A dan sampel B.AbstractThe magnetic field effect on the charge carrier of Spirulina sp thin filmsby spin coating fabrication by mean a I-V measurements is reported in this paper. Magnetoconductance measurements showed that the field required to achieve the saturated currentof sample B is smaller than the sample A. This indicated the mechanism of charge carrier recombination attribute to the degree of purity. Finally, a MC ratio of 37.4% and 50.6% was obtained for sample A and sample B, respectively.

Pengaruh Doping Ion Alumunium pada Kurva Serapan FTIR dan Struktur Kristal Nanopartikel Kobalt Ferit Hasil Kopresipitasi Anisa Khoiriah; U Utari; Budi Purnama
Jurnal Fisika dan Aplikasinya Vol 13, No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Telah dipelajari pengaruh doping ion alumunium pada nanopartikel cobalt ferrite hasil fabrikasi metode kopresipitasi. Ion alumunium dipilih mengingat jari-jari kovalennya sebanding dengan jari-jari cobalt. Hasil analisis FTIR menunjukkan pada tetrahedral site, force constant berubah sebesar 0,23 N/m akibat doping ionalumunium. Berdasar analisis XRD pada puncak tertinggi, ukuran kristalit tanpa dan dengan doping alumunium adalah masing masing 57,75 nm menjadi 46,2 nm. Perubahan ukuran kristalit ini disinyalir akibat substitusi ion cobalt dengan ion alumunium dengan jari-jari kovalen alumunium lebih kecil dibanding ion cobalt.ABSTRACTIt has been studied the aluminum doping effect on co-precipitated cobalt ferrite nanoparticles. Aluminum ion .was chosen considering covalent radius comparable to the radius of cobalt. The analysis of FTIR results showed that the change of constant force without and with doping aluminum ion on tetrahedral site was 0.23 N / m. The calculated of crystallite size from the strongest peak of XRD pattern indicated that the crystallite size reduces from 57.75 to 46.20 nm after doped aluminum. The change of the crystallite size was presumably due to the substitution of cobalt ions with aluminum ions since the aluminum covalent radius was smaller than cobalt ions.

Inisiasi Kemampuan Berwirausaha melalui Pengenalan E-Commerce bagi Anak Panti Asuhan Yatim Muhammadiyah Cabang Blimbing Sukoharjo Mohtar Yunianto; Budi Purnama; Kusumandari Kusumandari; Utari Utari
Jurnal Pengabdian Pada Masyarakat Vol 4 No 3 (2019)
Publisher : Universitas Mathla'ul Anwar Banten

INITIATING ENTREPRENEURIAL SKILLS THROUGH THE INTRODUCTION OF E-COMMERCE FOR ORPHANS OF THE MUHAMMADIYAH ORPHANAGE IN BLIMBING SUKOHARJO. Efforts to improve skills and the cultivation of entrepreneurial spirit have been carried out at the Orphanage PKU Muhammadiyah Cabang Blimbing. This institution is home to 20 orphans located in Wonorejo, Polokarto, Sukoharjo. Wonorejo village is a convection village where most of the population work as convection producers, which in the sale of their clothes still use conventional methods, which are sold in stores and in markets. The pattern of mutually beneficial cooperation between convection entrepreneurs and orphans is initiated by technopreneurship activities namely by selling convection through online stores.

Surface Morphology of Fe(III)-Porphyrin Thin Layers as Characterized by Atomic Force Microscopy Utari Utari; Kusumandari Kusumandari; Budi Purnama; Mudasir Mudasir; Kamsul Abraha
Indonesian Journal of Chemistry Vol 16, No 3 (2016)
Publisher : Universitas Gadjah Mada

Surface morphology of Fe(III)–porphyrin thin layers was studied using atomic force microscopy. The thin layer samples used in these experiments were deposited by spin coating methods on indium–tin-oxide substrates at room temperature under atmospheric conditions. Variations of thin layer of Fe(III)-porphyrin were done by modifying the rotational speed and the concentration of the solution. The experimental results demonstrated that the Fe(III)–porphyrin layers were observed as discrete nanomolecular islands. Both the number of nano-islands and thickness of the layer increased significantly with increasing concentration. A layer thickness of 15 nm was obtained for low concentrations of 0.00153 M and become 25 nm for dense concentrations of 0.153 M. Conversely, the higher number of islands were deposited on the surface of the substrate at a lower rotational speed.

Kajian Simulasi Mikromagnetik: Ketergantungan Medan Koersif dengan Besaran Intrinsik Nano-Dot Magnetik dengan Anisotropi Tegak Lurus Budi Purnama; Ismail Ismail; Suharyana Suharyana
Jurnal Fisika dan Aplikasinya Vol 9, No 1 (2013)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Kajian simulasi mikromagnetik magnetisasi reversal pada nano-dot magnetik dengan anisotropi tegak lurus telah dilakukan dengan menyelesaikan persamaan Landau-Lifshitz-Gilbert. Model yang disimulasikan nano-dot bahan magnetik pada unit sel Heat Assisted Magnetic Recording (HAMR) dengan dimensi 50 nm × 50 nm × 20 nm, 4MS = 2500 gauss, TC = 373 K dan konstanta anisotropi K? = 5.105 erg/cm3. Simulasi ini dilakukan untuk mengetahui faktor-faktor fisis yang berpengaruh pada koersifitas dari pengamatan proses magnetisasi reversal. Hasil simulasi menunjukkan medan koersif meningkat sebesar 18% dengan penurunan redaman Gilbert dari = 1 hingga = 0,3. Akhirnya, peningkatan medan koesif juga teramati sebesar 32,7% dengan penurunan konstanta exchange stiffness dari A = 1.10−6 erg/cm hingga A = 1.10−7 erg/cm.

Photocatalytic Properties of Co-precipitated Bismuth Cobalt Ferrite Abi Catur Saputri; Nurdiyantoro Putra Prasetya; Utari Utari; Budi Purnama
Jurnal Ilmu Fisika Vol 14 No 2 (2022): September 2022
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.14.2.116-123.2022

Bismuth substituted cobalt ferrite nanoparticle is studied for photocatalytic in this paper. Bismuth cobalt ferrite has been synthesized by the coprecipitation method and low-temperature annealing treatment. The characterization results showed that the XRD spectral pattern is consistent with ICDD 221086. The crystallite size of bismuth cobalt ferrite increases with increasing annealing temperature. FTIR results confirm the available metal-oxide at number wave around 570/cm and 475/cm which is the appearance of octahedral and tetrahedral sites owing cobalt ferrite. The photocatalyst test was carried out by varying the catalyst mass and UV irradiation time. The absorption spectrum decreases with increasing catalyst mass. The increase in UV irradiation time causes the formation of more holes (h+) and electrons (e-). So that the hydroxide reaction occurs that produces free radicals. The results of this study indicate that cobalt ferrite-based nanoparticles have potential as photocatalyst materials.

Magnetic Characterization of Fine Sediment in the Solo Basin Indonesia Budi Legowo; Anti Fatkhul Qoiriah; Artono Dwijo Sutomo; Shandiyano Putra; Wiwit Suryanto; Budi Purnama
Journal of Mathematical and Fundamental Sciences Vol. 55 No. 2 (2023)
Publisher : Directorate for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2023.55.2.1

The magnetic characteristics of fine sediment samples from the Solo Basin are reported in this paper. Magnetic fine sediment was identified by magnetic susceptibility mapping based on sampling of 182 points. Then, a depth analysis (on 7 selected sampling points) was performed using X-ray fluorescence spectrometry, which showed an iron oxide content of up to 55.42%, while X-ray diffractometry confirmed magnetite minerals with crystallite size ≤100 nm. Further, the vibrating sample magnetometry results verified the magnetic characteristics under a single-domain configuration. The characteristic magnetic susceptibility map showed that there is a lithogenic effect on sediment in the Solo Basin. In addition, anthropogenic activities seem to play a pivotal role in distributing magnetic materials.

Demonstration of Magneto-Impedance Sensor on Multilayer Coil [Ni80Fe20/Cu]N Result of Electro-Deposition Nahrun, Ahmad Asrori; Wicaksono, B. Anggit; Ismail, Ismail; Nuryani, Nuryani; Purnama, Budi
Jurnal ILMU DASAR Vol 17 No 2 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Demonstration performance magneto - impedance sensor on the coil wire multilayer [ Ni80Fe20/Cu ]N electro - deposition results presented in this paper . At first multilayer [ Ni80Fe20/Cu ]N deposited on a Cu wire into a coil and then the sample is modified by the number of windings 2 and 4. The results of impedance measurements under the influence of the magnetic field shows that the magneto - impedance ratio increases with the increase in the number of windings. Magneto - impedance ratio changed from 15 % to 17.4% with a change in the number of windings of 2 to 4. The fact these results allegedly contributed their self-inductance value of this magnitude greater contribution to the increase in the number of windings.Keywords: Magneto - impedance sensor, electro-deposition , multilayer coils [Ni80Fe20/Cu]N

Annealing temperature modify of crystalline structure, magnetic properties and antibacterial performance in nickel substituted cobalt ferrite nanoparticles utilizing natural-fine-sediment Bestari, Laksmita Farah; Iqlimatussholihah, Lathifah; Prasetya, Nurdiyantoro Putra; Kusumandari; Utari; Riyatun; Purnama, Budi
Communications in Science and Technology Vol 9 No 2 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.2.2024.1495

This study details the nickel-substituted cobalt ferrite nanoparticle employing natural fine sediment (NiCFO-fs) annealing temperature dependency of crystalline and magnetic characteristics. The NiCFO-fs nanoparticles were prepared by the coprecipitation method with varying annealing temperatures (200-500°C with increment of 100°C for five hours). As a comparison, Ni-CFO was also synthesized using pure analytical chemicals (NiCFO-pa). The XRD results showed that the whole Ni-CFO nanoparticles established an inverse spinel face center cubic (fcc) order according to space group Fd-3m for both NiCFO-fs and NiCFO-pa. There was no additional peak, indicating that Ni2+ cations successfully substituted in cobalt ferrite nanoparticles. In case of NiCFO-fs nanoparticle samples, a crystallite size (D) decreased with the increasing annealing temperature (Ta), namely 45.72 nm, 37.35 nm, 25.95 nm, and 20.51 nm. In contrast to NiCFO-pa, the D increased with the increase of the Ta, i.e., 19.67 nm, 20.74 nm, 21.99 nm, and 23.33 nm. Meanwhile, FTIR results showed the presence of metal-oxygen bonds at 551-586 cm-1 and 384-391 cm-1 at tetrahedral (k1) and the octahedral (k2) sites for both NiCFO-fs and NiCFO-pa nanoparticles samples. The VSM result showed that a narrow hysteresis curve was observed for the NiCFO-fs sample compared to NiCFO-pa. The NiCFO-fs nanoparticles owing the smallest coercive field (HC) of 79.5 Oe were attained for the Ta of 300°C. In case of NiCFO-fs samples, magnetization saturation (MS) decreased with the increase of the Ta in contrast to NiCFO-pa samples. Here, the redistribution of two and three plus ions in the sub-lattice k1 and k2 locations should be encouraged by the Jahn-Teller phenomenon through strain-induced magnetism. The findings of the antibacterial test indicated that the potential of NiCFO based on natural materials (fine sediment) was higher than that of NiCFO based on pure analytical chemicals. This result was also supported by the emergence of ZOI magnitudes for all NiCFO-fs materials compared to NiCFO-pa that was only at Ta = 300°C.

Co-Authors Abi Catur Saputri Ahmad Asrori Nahrun, Ahmad Asrori Anisa Khoiriah Anti Fatkhul Qoiriah Artono Dwijo Sutomo Artono Dwijo Sutomo Artono Dwijo Sutomo Artono Dwijo Sutomo B. Anggit Wicaksono, B. Anggit Bestari, Laksmita Farah Budi Legowo Budi Legowo Candra Tirta Putra Cari Cari Dian Afif Rusydan Didik Eko Saputro Dwi Teguh Rahardjo Elly Fatmawati Endang Fauziati Fahru Nurosyid Fatmawati, Elly Fonita, Elvira Freditia Hanafi Eko Prasetyo Hanin Firdausi Iqlimatussholihah, Lathifah Ismail Ismail Ismail Ismail Ismail Ismail Kamsul Abraha Kamsul Abraha Kusumandari Kusumandari, Kusumandari Kusumaningsih, Cyntia Mahardhika Mohtar Yunianto Mohtar Yunianto, Mohtar Mudasir Mudasir Muhammad Amiruddin Musadewi, Adiana Nuryani Nuryani Nuryani Nuryani Ovita, Lala Devi Prasetya, Nurdiyantoro Putra Rahmawati, Ramadona Riyatun Riyatun Riyatun Riyatun, Riyatun Septinia Qoirun Nisa Shandiyano Putra Sri Budiawanti Suharno Suharno Suharno Suharno Suharyana Suharyana Suharyana Suharyana Sulistiyana, Defi Supatmi Supatmi U Utari U Utari U Utari U Utari Utari Utari Utari Utari Utari Utari Utari Vina Oktaria Wahid Sidik Sarifuddin Wahyu Eko Prastyo Wiji Lestari Wisnu Sadnawanto Wiwit Suryanto Yeni Herlina K. Dasi Yofentina Iriani Yundari, Yundari

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