Garuda - Garba Rujukan Digital

p-Index From 2021 - 2026

2.189

P-Index

This Author published in this journals

All Journal Jurnal Ilmu Dasar Journal of Mathematical and Fundamental Sciences Science and Technology Indonesia JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika) Jurnal Penelitian Pendidikan IPA (JPPIPA) Spektra: Jurnal Fisika dan Aplikasinya JURNAL EKSAKTA PENDIDIKAN (JEP) Eksakta : Berkala Ilmiah Bidang MIPA Pelita Eksakta Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Journal of Social And Economics Research journal of social and economic research

Ramli Ramli

Universitas Negeri Padang

Author-ID : 3501599

Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

Published : 64 Documents Claim Missing Document

Claim Missing Document

Articles

2 3 4 5 6

The effect of composition MnFe2O4 / PANi nanocomposite on the microstructure that synthesized by spin coating method Lucya Sinurat; Yenni Darvina; - Ramli; - Ratnawulan
PILLAR OF PHYSICS Vol 13, No 2 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Manganese ferrite has the structure of MnFe2O4 which in the process of making it uses manganese mineral powder. Based on the MnFe2O4 testing is one material that is suitable for use as a composite by mixing other binders in it. Polyaniline (PANi) is a polymer that can be used as a binding material which is an attractive conductive polymer because it has unique properties and good thermal stability. This research was conducted by making three variations of the composition of MnFe2O4 / PANi namely 40%: 60%, 50%: 50%, and 60%: 40% made using the spin coating method. This research was conducted to investigate the effect of composition on the microstructure of the MnFe2O4 / PANi nanocomposite layer using the spin coating method. The microstructure to be investigated is the functional group of grain size and thickness of the nanocomposite layer. The tools used in this study are Fourier Transform Infrared (FTIR) used to obtain the functional groups of nanocomposite layers, X-ray Diffraction (XRD) is used to get the size of crystals and microstructure of crystals, and the Scanning Electron Microscope (SEM). Characterization and Scanning Electron Microscope (SEM) are used to obtain grain size and thickness of the nanocomposite layer. The results of the FTIR characterization are the functional groups of MnFe2O4 / PANi which produce absorption bands at wavenumbers 3214.85 cm-1, 3353.86 cm-1, and 3214.03 cm-1, which are O-H groups. The absorption band at wavenumbers 717.00 cm-1, 763.94 cm-1, and 747.31 cm-1 is the C-H group showing PANi. Absorption peaks that are below 1000 cm-1 that is at wavenumbers 874.78 cm-1, 924.18 cm-1, and 895.96 cm-1 show indications of Manganese Ferrit. The results of the XRD characterization were crystal size and microstrain, each of which had a crystal size composition of 49.90478417 nm, 45.29656118 nm, and 44.52213202, and then for the value of the microstrain, each variation was 0.116667149, 0.15983276, and 0.183718732. Then from SEM characterization results obtained grain size values of 0.445 μm, 0.426 μm, 0.318 μm, while the thickness obtained for each variation is 1.29 μm, 2.02 μm, and 2.20 μm. Based on the results of the study, the greater the addition of PANi composition given, the value of crystal size, grain size also increases while the value of microstructure and thickness decreases.

Studi awal rancangan alat colorimeter menggunakan sensor OPT101 untuk menentukan serapan ekstrak pewarna alami berbasis mikrokontroler arduino (Preliminary study of the colorimeter design using OPT101 sensor to determine the absorption of natural dye extracts based on the Arduino microcontroller) Puja Kahar; - Yulkifli; - Ramli
PILLAR OF PHYSICS Vol 12, No 1 (2019)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Colorimeter is a color measuring instrument used to measure the amount of output voltage produced by each different dye. The dyes used here are red and orange color dyes as the beginning of the experiment. The samples used can be used in hazardous and harmless coloring materials, but in this experiment using non-hazardous artificial materials. The results of the trial output are displayed on the LCD. This tool uses LED as a source of light emitted in samples that are red and orange, then captured by the OPT101 Sensor which converts light into an output voltage. The output voltage is amplified by a voltage amplifier circuit. The results of the output voltage are confirmed on the arduino which is then displayed on the LCD. The program from Arduino is programmed using Arduino software which is then compiled or sent to Arduino which is then displayed on the LCD. The results of the colormetical device were made on a 2.4 volt red sample and an orange sample of 3.13 volts. So that from the measurement results we can distinguish colors from the sample used

Pengaruh komposisi MnFe2O4 terhadap sifat magnetik nanokomposit MnFe2O4 / PVDF yang di preparasi dengan metode spin coating (The effect of the MnFe2O4 composition on the magnetic properties of the MnFe2O4 / PVDF nanocomposites prepared by the spin coating method) Romizah Marta; Yenni Darvina; - Ramli; - Desnita
PILLAR OF PHYSICS Vol 13, No 1 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Now is the age of the "Internet of things", where physical devices are able to exchange information between information sources connected to the system. To build a system, it takes a components device which in the manufacturing process is made into Nanocomposites. In this research, the materials used as Nanocomposites are Manganese ferrite (MnFe2O4) and Polyvinilidene Flouride (PVDF). Then the method used is the Spin Coating. The Spin Coating Method is used to grow a thin layer of MnFe2O4 / PVDF Nanocomposites. In the process of making Nanocomposites, Manganese and Iron are used as precursors. In this research, researcher used five variations of the composition of MnFe2O4 / PVDF Nanocomposites, namely 25% : 75%, 33.33%: 66.67%, 50% : 50%, 66.67%: 33.33% and 75%: 25%. There are three characterization tools used in this research namely XRD, FTIR and VSM. The results of XRD characterization as supporting data in this research show each peak has a different angle of 2Ө, intensity, FWHM value and Miller Index. Crystal form of PVDF is Monoclinic and Crystal form of MnFe2O4 is Cubic. The results of FTIR characterization as supporting data found two functional groups, namely Fe-O and CH2. For Fe-O is the MnFe2O4 Function Group, and CH2 is the PVDF Function Group or (C2H2F2)n. The results of the characterization of VSM as the results of the study show the relationship between the variation of the composition of the MnFe2O4 / PVDF Nanocomposites with Saturation Magnetization which tends to decrease which is worth 2.07 at 25% : 75% composition, 1.11 at 33.33% : 66.67% composition, 1 at 50% : 50% composition, 1.54 at 66.67% : 33.33% composition and 1.09 at 75%: 25% composition. The same result also occurs in the relationship of composition variation with Remanent Magnetization, which is worth 0.37 at 25% : 75% composition, 0.35 at 33.33% : 66.67%, 0.47 at 50% : 50% composition, 0.31 at 66.67% : 33.33% composition, 0.25 at 75% : 25% composition. Furthermore, the results of the relationship of variations in the composition of MnFe2O4 / PVDF nanocomposite with Coercivity is high low Coercivity values. This shows the change in nature from Hard Magnetic to Soft Magnetic. The value of Coercivity is 297.08 at 25% : 75% composition, 144.96 at 33.33%: 66.67% composition, 274.05 at 50% : 50% composition, 300.53 at 66.67% : 33.33% composition and 196.57 at 75% : 25% composition.

Pengaruh fraksi konsentrasi nanokomposit Fe3O4/PANi dengan metode sol-gel spin coating untuk material elektroda baterai lithium (Effect of Fe3O4 / PANi nanocomposite concentration fraction by sol-gel spin coating method for lithium battery electrode material ) Varadila Sahanaya; - Ramli; Yenni Darvina
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

In this modern era, technological developments in the field of electronic devices are progressing very rapidly. Therefore, this triggers the demand for storage of electrical energy, one of which is a lithium battery. The performance of the lithium battery depends on the electrode material used. The purpose of this study was to investigate the effect of Fe3O4 concentration on Fe3O4/PANi nanocomposite electrical properties by sol gel method for lithium battery electrode material. In this study, the growth of Fe3O4/PANi nanocomposite layers using spin coating method with a concentration variation of 30%, 40%, 50%, 60% and 70%. Magnetite was prepared using sol-gel technique with precursors (Fe(NO3)3.9H2O). Then the precursor was mixed with PANi polymer with varied concentrations. The results of Fe3O4/PANi Gel are coated on a glass substrate followed by a drying process. Fe3O4/PANi nanocomposite layers were characterized using X-Ray Diffraction and Scanning Electron Microscopy and LCR meters. The results of this study indicate that at a concentration of 30% to a concentration of 40% there is a decrease but at a concentration of 50% an increase in the size of the crystal and at a concentration of 60% to 70% decreased again. FTIR results show the molecular bond formed and the results of SEM imaging show the thickness of the nanocomposite layer. As well as conductivity and electrical capacitance obtained through characterization using LCR meters which are 6.91218303 S/cm and 2.69 x10-10F.

Pengaruh suhu sintering pada penyerapan gelombang mikro nanokomposit NiFe2O 4 / PVDF untuk material penyerap radar (Sintering temperature effect on microwave absorption of NiFe2O4 / PVDF nanocomposite for radar-absorbent materials) Moulia Fadhilah; - Ramli; - Gusnedi; - Yohandri
PILLAR OF PHYSICS Vol 12, No 2 (2019)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Synthesis ofoNiFe2O4/PVDF nanocomposite with sintering temperature variations of 2500C, 280, 3000C, 3500C, 4500C has been done with the solgel method for microwave absorbing material (RAM).This material is to reduce reflections or absorb microwaves, so objects coated with RAM are not detected by Radio Detection and Ranging (RADAR). In making nanocomposite NiFe2O4 / PVDF, it includes the making of Fe3O4 precursor solution using iron sand, making NiFe2O4 solution, making NiFe2O4 / PVDF nanocomposite, printing, and sintering. The samples were characterized by XRD. FTIR and VNA. For the analysis of microwave absorption ability as measured by the Vector Network Analyzerr(VNA), and then maximum Reflection Loss (RL) number was obtained at theesintering temperature of 2800C at -27.5767 dB at aafrequency off11.20 GHz which the X-Band region with microwaveeabsorption in coefficient amounting to 0.0417989142. Nanocomposite NiFe2O4 / PVDF can absorb microwaves ~ 96% at a frequency of 11.20 GHz. So, NiFe2O4/PVDF nanocomposite is suitable for Absorbing Radar Material

Pengaruh variasi komposisi pada sifat magnet dari nanokomposit NiFe2O4/PANi yang disintesis dengan metode sol-gel spin coating (Composition variations effect on the magnetic properties of NiFe2O4 / PANi nanocomposites synthesized by the sol-gel spin coating) - Helmita; - Ramli; - Hidayati
PILLAR OF PHYSICS Vol 12, No 1 (2019)
Publisher : Department of Physics – Universitas Negeri Padang UNP

NiFe2O4-polyaniline nanocomposites (NiFe2O4-PANi) with different contens of NiFe2O4 and PANi (30%,40%,50%,60% and 70% were prepared via sol-gel spincoating methode. The prepared sample were characterized using some teqniques such as X-Ray difraction and magnetic properties of the nanocomposites were measured using vibrating sample magnetometer. Nanocomposites were prepared using sol-gel spin coating technique (Fe(NO3)3.9H2O and Ni(NO3)2.6H2O precursors. Composite gels were coated on a glass substrate followed by drying and annealing to be used as thin films. Thin layers of nanocomposites were characterized using X-Ray Diffraction and Vibrating Sample Magnetometer, crystal size, coercivity, remanent magnetization, saturation magnetization at 30% composition were 44.36nm, 512Oe, 1.02mm, 1.02mm, at 40% variation respectively was 21.20 nm; 579,91Oe; 1,07 mm; 3,15mm; on 50% variation were 42,25nm; 562,42Oe; 1,04mm; 3,50mm; on 60% variation 43,96nm respectively; 639 .0Oe; 1.04mm; 3.01mm, at 60% variation respectively 39.18nm; 447.21Oe; 1.33mm; 4.38. Variations of NiFe2O4 / PaNi nanocomposite composition affect crystal size and magnetic properties of nanocomposite samples NiFe2O4 / PaNi

Sintesis dan karakterisasi sifat optik film tipis hausmannite (Mn3O4) dengan metode spin coating ( Synthesis and characterization of the optical properties of hausmannite thin film (Mn3O4) by spin coating method ) Bevi Lidia; - Ratnawulan; - Ramli
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Hausmannite is applied as a semiconductor electronics material one of them as optoelectronic material. The purpose of this research is to investigate the influence of calcination temperature on the growth of thin film by spin coanting method against the optical properties of hausmannite. Based on the results of the value of transmittance and reflectance of the thin film of hausmannite decreases at a temperature of 200 °C to 400 °C then enlarges at a temperature of 500 °C. And the absorbance value of the thin film of hausmannite enlarges at a temperature of 200 °C to 400 °C and then shrinks at a temperature of 500 °C. Using the value of transmittance obtained large energy gap at the temperature calcination 200 °C, 300 °C, 400 °C and 500 °C is 1.53 eV, 1.64 eV, 2.26 eV and 2.28 eV.

Pengaruh komposisi CoFe2O4 terhadap sifat magnetik nanokomposit CoFe2O4/PVDF yang disintesis dengan metode sol gel (The effect of CoFe2O4 composition on the magnetic properties of the CoFe2O4 / PVDF nanocomposites synthesized by the sol gel method) Sovia Yulianti; - Ramli; - Yulkifli; Yenni Darvina
PILLAR OF PHYSICS Vol 13, No 1 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Cobalt Ferrite (CoFe2O4) is a magnetic material that has high coercivity, magnetic properties, and has electrical resistivity and high saturation magnetization, very suitable for applications in the field of magnetic, magnetic sensors, magnetic sensor constituents, biomedical materials, Magnetic Resonance Imaging (MRI) and hypertamia. The purpose of the survey is to explain the composition of the CoFe2O4 composition on the magnetic properties of the CoFe2O4 / PVDF nanocomposites synthesized by the Sol-Gel Method. There are three research results from vsm test data on hysteresis curves. First, the magnetization saturation data of each variation obtained results of 2.07 memu, 0.97 memu, 2.18 memu, 1.07 memu, and 0.91 memu. Second, the Remanent Magnetization data obtained results are 0.41 memu, 0.28 memu, 0.35 memu, 0.27 memu, and 0.16 memu. Third, the Medan Coercivity data is 208.31 Oe, 293.42 Oe, 163.20 Oe, 335.88 Oe, and 93.86 Oe.

Magnetoresistance characterization of nanocomposite Fe3O4 / PPy that synthesized with sol-gel spin coating method Surya Pertiwi; - Ramli
PILLAR OF PHYSICS Vol 13, No 2 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Indonesia is a rich country that has various natural resources, one of which is in the form of mining materials such as iron sand which contains a lot of magnetite (Fe3O4). Magnetite (Fe3O4) has superior properties compared to others so that magnetite (Fe3O4) is a top priority in research activities that are rapidly developing in world research. Polypyrrole (PPy) is a conductive polymer which has several advantages. Fe3O4 nanoparticles are a type of magnetic material that has considerable potential in GMR magnetic sensor applications. The aim of this research is to synthesize and characterize the effect of Fe3O4 composition on the magnetoresistance properties of Fe3O4/PPy nanocomposites synthesized by the Sol Gel spin coating method. In this study, several stages were carried out, namely: the sample preparation stage, the nanocomposite manufacturing stage, the characterization stage and the data analysis. Fe3O4/PPy thin layer nanocomposite is made from iron sand that has been purified and milled by previous researchers. Fe3O4/PPy nanocomposites were prepared using the sol-gel method with a variation of Fe3O4/PPy concentrations of 30%, 40%, 50%, 60% and 70% and then grown using the spin coating method with a rotating speed of 3000 rpm for 60 seconds, the thin layer formed was dried using a furnace at 5500C for 1 hour. Then the thin layer was characterized using XRF, FTIR, SEM and FPP. Based on all the characterizations that have been obtained, a thin layer of nanocomposite has been successfully grown on glass preparations. Fe3O4/PPy nanocomposite thin layer is a thin layer that has good magnetoresistance properties, this is shown in the results of testing the magnetoresistance properties using the Four Point Probe (FPP) method.

Sintesis lapisan hydrophobic nanokomposit mangan oksida/polystyrene (MnO2/PS) untuk aplikasi self cleaning (Synthesis of manganese oxide / polystyrene nanocomposite hydrophobic coating (MnO2 / PS) for self cleaning applications ) Tia Adriany Putri; - Ratnawulan; - Ramli
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The ability of a self-cleaning surface is widely used as a surface coating such as glass, buildings, textiles, ceramics, and so on. This mechanism is called self-cleaning. The self-cleaning mechanism of the hydrophobic substrate surface is based on the effect of the lotus leaf. The surface of the substrate with a lotus leaf effect makes the impurities accumulated on the surface of the substrate fall due to water repulsion. The purpose of this research is to investigate the synthesis of hydrophobic coating of MnO2 / PS nanocomposites which is expected to be utilized as a surface self-cleaning application. The result of this research is the synthesis of hydrophobic coating of MnO2 / PS nanocomposites shows a large change of contact angle. Where the contact angle increased during the temperature of 25-300 º C, then decreased to 400 ºC.

Co-Authors - Helmita - Rahmi - Yulkifli Adli Dzil Ikhram Ahmad Aminudin Ahmad Fauzi Ahmad Rofiq Ambran Hartono Ambran Hartono Ambran Hartono arifaldi arifaldi Asrizal Bevi Lidia Cici Dwi Tisa Haspen Cuk Imawan Dadang Dadang Desnita Dessi Verawati Djusmaini Djamas Djusmaini Djamas Djusmaini Djamas Edi Sanjaya Edi Sanjaya Elvida Yulia Fadhila Ulfa Jhora Faridah Lisa Supian Fatni Mufit Fildzah Rudyah Putri Nurzam Fitri Anika Freddy Haryanto Gusmita Cahnia Putri Gusnedi Gusnedi Hamdi Rifai Haryona Delvita Herman Bahar Hidayati Hidayati Hifnul Rizky Al Ulfa Iing Rika Yanti Imron Maulana Indah Septia Ningsih Irna Humairah Jalu Ahmad Prakosa Khairunnisa Khairunnisa Khairurrijal Khairurrijal Lathifa Zonesya Putri Letmi Dwiridal Lucya Sinurat Mahrizal Mahrizal masril masril Mitra Djamal Mitra Djamal Mitri Selisne Moulia Fadhilah Muhammad Yogi Rivano Nadia Ardianti Nadya Aztifa Nidya Yulfriska Nurhafizah Nurhafizah Nurul Hasanah Daniyah Putri Onny Gustira Puja Kahar Putri Auliyani Putri Diana Rahadian Zainul Rahmat Hidayat Ramanda Fazrian Ratnawulan . Renol Afrizon Ricca Tiara Rif'il Husniyah Rigis Sugianti Rika Nanda Rio Anshari Riri Jonuarti rizka fauziah Romizah Marta Rumi Yuliska Silvi Trisna Silvi Yulia Sari Silvira Wahyuni Siti Fauziah Sovia Yulianti Suci Wahyuni Sumi Sahara Suparno Satira Surya Pertiwi Syafri Jamain Syafriani Syafriani Syafrijon Syafrijon Tia Adriany Putri Usmeldi Usmeldi Vanessa Febta Sindani Varadila Sahanaya viola sesri wahyuli Viona Zikra Yerman Wahyumin Kurnia Illahi Wahyuni Satria Dewi Yenni Darvina Yessy Arinda Putri Yohandri Yona Sri Mantia Yonira Mike Vindi Marta Yufrizal Yufrizal Yulis Septianas Sari Yulkifli Yulkifli Yulkifli Yulkifli Zaitul Hidayat Zhafrandy Eka Senida Zulhendri Kamus

Title

Found 64 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 64 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 64 Documents
Search