Papers by Ari Sintya Rini
Komunikasi Fisika Indonesia
Synthesis of silver nanoparticles was carried out by a reduction method using yellow watermelon r... more Synthesis of silver nanoparticles was carried out by a reduction method using yellow watermelon rind extract. Variation of sample on this synthesis was doing with ratio volume extract and ag, i.e., 1:3 and 3:1. This synthesis has been successfully carried out using 1M NaOH as a stabilizer. The formation and stability of silver nanoparticles was observed through Uv-vis absorbance spectrum. The results of the analysis using Uv-Vis spectroscopy show the formation of silver nanoparticles at wavelengths of 440-446 nm with absorbance values of 0.8356 a.u and 1.0458 a.u respectively. The FTIR analysis showed the existence of a polyphenol group functional with a range of wave numbers 601.82-3359.18 cm-1. This result concludes that yellow watermelon rind extract is involved in reducing Ag+ to Ag0.
The effect of heating rate on BaZrxTi1-xO3 thin film for x=0.4 and x=0.6 as capacitors
Journal of Materials Research and Technology
Journal of Technomaterials Physics, 2019
The Simulations of X-ray diffraction patterns of MgO, BaO and ZnS ceramics were successfully perf... more The Simulations of X-ray diffraction patterns of MgO, BaO and ZnS ceramics were successfully performed by VESTA program, based on the crystal structures visualization. The aim of this research was to obtain the relationship between ionic radius to the diffraction pattern. The X-ray diffraction pattern was generated from visualization of the crystal structure. The crystal structure information was obtained from JCPDS data which contained lattice parameter, atomic coordinate and the space group. The X-ray diffraction pattern parameters which are taken into account in this research are diffraction angle of 2 Theta and Intensity. The results indicated that the peak position and intensity of the diffraction pattern are influenced by ionic radius of the cations. Structural transformation was also detected from this simulation.
POSITRON, 2021
Zinc oxide (ZnO) synthesized with natural reductants has attracted the attention of researchers b... more Zinc oxide (ZnO) synthesized with natural reductants has attracted the attention of researchers because it is environmentally friendly and non-toxic. In this study, ZnO was prepared using Sandoricum koetjape (S. koetjape) peel extract. An aqueous extract of S. koetjape peel was used as biological reduction agent for the synthesis of ZnO from zinc nitrate hexahydrate. The ZnO powder obtained was annealed at different temperatures i.e, 300°C, 400°C, and 500°C for 1 hour. Structural, morphological, optical properties, and functional groups of samples were analyzed using X-Ray Diffraction, Scanning Electron Microscopy, UV-Vis Spectroscopy, and Fourier Transform Infrared Spectroscopy, respectively. The X-ray diffraction pattern shows that pure hexagonal wurtzite structure of ZnO particles can be achieved after annealing. The crystal size has also increased with increasing annealing temperature. SEM photo demonstrates the transformation of ZnO particle from spherical to microflower due to...
Communications in Science and Technology, 2021
This study aims to investigate the physical characteristics and photocatalyst activity of biosynt... more This study aims to investigate the physical characteristics and photocatalyst activity of biosynthesized ZnO with pineapple (Ananas comosus) peel extract under microwave irradiation. The ZnO powder was prepared in two different concentrations of zinc nitrate hexahydrate (ZNH) at 200mM (Z-200) and 500 mM (Z-500). The optical, structural, and morphological properties of ZnO were analyzed using UV-Vis spectroscopy, X-Ray Diffraction (XRD), and Scanning Electron Microscopy (SEM), respectively. The UV-Vis absorption spectrum showed a wide absorbance peak of ZnO at the wavelength of 300-360 nm with a bandgap energy of 3.22 and 3.25 eV. The XRD result confirmed the wurtzite structure of ZnO with high crystallinity. SEM morphology showed spherical particles with an average particle size of 190-220 nm. For photocatalytic application, ZnO film was fabricated via the doctor blade method from microwave-assisted biosynthesized ZnO powder. ZnO films were then applied under UV-irradiation to exami...
Abstrak . Sel surya berbasis perovskite merupakan sel fotovoltaik generasi terakhir yang mampu me... more Abstrak . Sel surya berbasis perovskite merupakan sel fotovoltaik generasi terakhir yang mampu memanfaatkan energi surya dengan efisiensi tinggi dan dapat difabrikasi melalui proses yang sederhana dan murah. Sejak diperkenalkannya perovskite solar cell (PSC), efisiensi konversi dayanya telah mencapai efisiensi di atas 23% dalam waktu yang relatif singkat diiringi dengan peningkatan publikasi ilmiah di bidang ini. Penggunaan semikonduktor ZnO sebagai Electron Transport Material (ETM) yang merupakan salah satu bagian utama dalam PSC mulai dilirik akibat proses pembuatan yang lebih sederhana dibandingkan TiO 2 . Seng oksida (ZnO) masih memiliki kelemahan yang dapat diatasi dengan penambahan ZnS untuk mengurangi rekombinasi pembawa muatan dari lapisan perovskite ke ETM. Tujuan dari artikel ini adalah untuk menyajikan tinjauan singkat tentang status terkini mengenai komposit ZnO/ZnS sebagai elektron transport material pada sel surya perovskit. Ulasan ini juga membahas peran penambahan Zn...
Structural and morphological studies of silver nanoparticles prepared using Citrullus lanatus rind extract
In early 2020, the world was shocked by the outbreak of new pneumonia that started in Wuhan, Hube... more In early 2020, the world was shocked by the outbreak of new pneumonia that started in Wuhan, Hubei Province which then spread rapidly to more than 190 countries and territories. This outbreak is named coronavirus disease 2019 (Covid-19) which is caused by Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2). People are not aware that their hands are often contaminated with bacteria and viruses during their activities. One of the simplest ways and can be done to prevent this is to wash your hands using soap or antiseptic, hand sanitizer. Washing your hands can reduce the number of bacteria by up to 58%. The advantages of hand sanitizers can kill germs in a relatively fast time. The active ingredients of hand sanitizers are generally alcohol group compounds with a concentration of ± 60% to 80% and the phenol group (triclosan) so that they have a mechanism of action by denaturing and coagulating cell protein germs. Therefore, making hand sanitizers in simple stages can be done ...
HJBAH KOMPETITIF PENELITiAN KERJASAMA INTERNASIONAL DALAM RANGKA PUBLIKASI INTERNASIONAL BATCH II TAHUN KE-1 (2009)
Salah satu alat diagnostik kedokteran yang menggunakan gelombang suara lebih dari 20 KHz adalah ... more Salah satu alat diagnostik kedokteran yang menggunakan gelombang suara lebih dari 20 KHz adalah ultrasnografi (USG). USG digunakan untuk mendiagnosa keadaan janin dalam kandungan dan mendeteksi suatu keadaan penyakit misalnya kanker. Penelitian ini memanfaatkan hasil rekaman USG janin dan mengolahnya dengan menggunakan program pengolahan ECG, EEG, pencitraan rekaman, dalam keadaan ini akan menampilkan bentuk sinyal denyut jantung janin (ECG) yang tidak terdapat pada hasil rekaman USG, serta melihat perbedaan pencitraan hasil rekaman dengan menggunakan frekuensi 0,5MHz, 1,5MHz, 10MHz. Dengan menggunakan rekaman USG janin pada frekuensi tersebut dapat ditampilkan bentuk sinyal ECG dan perbedaan pencitraan, dimana hasil pengolahan rekaman USG usia 16 minggu menampilkan bentuk sinyal ECG, EEG pada hasil program sama dengan keadaan sinyal ECG, EEG keadan janin normal, dan bentuk resolusi pencitaan hasil program lebih jelas antara warna cairan, tulang dan jaringan janin
Investigation of the Distribution of Aquifers and Groundwater Quality in the Village of Rimbo Panjang, Kampar District
The study using the geoelectric method produces apparent resistivity values with different color ... more The study using the geoelectric method produces apparent resistivity values with different color images. The Data is displayed in the form of a collection of 1-dimensional (1D) and 2-dimensional (2D) pseudosection points which are then processed using PROGRESS and RES2DINV software. The 1-dimensional cross-section results in the appearance of the subsurface structure vertically or shows the depth and thickness of the subsurface layers. The results of Wenner and Schlumberger configuration data processing show that there are differences in resistivity and depth values on each path but have the same lithology. This is because the Schlumberger configuration can only display 1 point of depth vertically, so the data obtained cannot compare the resistivity horizontally. But the advantage of the Schlumberger configuration is that it is capable of displaying a large depth compared to the Wenner configuration so that it is difficult to read a thin layer of this configuration. The Wenner Confi...
Metode-metode yang telah dilakukan dalam pengukuran ketebalan logam adalah metode manual (jangka ... more Metode-metode yang telah dilakukan dalam pengukuran ketebalan logam adalah metode manual (jangka sorong) dan metode ultrasonic thickness. Kelemahan dari kedua metode ini yaitu data yang dihasilkan kurang akurat karena sulitnya proses pembacaan dan harga yang relative mahal. Pengembangan teknologi di bidang sensor memungkinkan pembuatan detektor ketebalan logam yang dapat mengatasi kelemahan dari kedua metode tersebut yaitu menggunakan eddy current. Sensor eddy current dapat mengukur ketebalan lapisan logam non magnetik melalui hubungan tegangan dengan variasi ketebalan dimana ketebalan yang digunakan untuk Cu yaitu 0,4 mm, 1 mm, 1,5 mm, 2 mm, 4 mm, 4,2 mm, 5 mm, 5,1 mm sedangkan Al yang digunakan yaitu 0,25 mm, 0,4 mm, 0,5 mm, 0,6 mm, 1 mm, 1,2 mm, 1,5 mm, 2 mm, 2,2 mm, 3 mm, 4 mm, 5 mm dengan frekuensi yang diperoleh 700 KHz, 1 MHz dan 1,33 MHz. Kurva tegangan vs ketebalan untuk alumunium dan tembaga memiliki hubungan eksponensial. Jarak antara sensor dengan material non magnetik d...
Sulfur-doped zinc oxide (S-ZnO) nanorod has been successfully synthesized via the seed-mediated h... more Sulfur-doped zinc oxide (S-ZnO) nanorod has been successfully synthesized via the seed-mediated hydrothermal method with different sulfur concentrations (0%, 1%, 2.5%). This research aims to study the influence of the concentration of sulfur on the structure, morphology, and optical properties of ZnO as a promising material in a wide range of applications. Crystal structure, morphology, and optical properties of the samples were characterized using X-Ray Diffraction (XRD), Field Emission Electron Scanning Microscopy (FESEM), and UV-Vis Spectroscopy, respectively. The XRD pattern shows the strongest peak at 2θ = 34.43° for crystal orientation of (002). The crystallinity properties of the S-ZnO sample are higher compared to the ZnO sample. The FESEM images of the 1% S-ZnO sample exhibit the highest nanorod density arrangement. The optical absorbance of the higher sulfur dopant possesses a higher optical absorption peak on the UV-Vis spectrum. The results indicate that S doping to ZnO ...
Journal of Aceh Physics Society, 2021
Abstrak. Dalam rangka mengurangi pemakaian bahan kimia berbahaya, kini telah mulai dikembangkan ... more Abstrak. Dalam rangka mengurangi pemakaian bahan kimia berbahaya, kini telah mulai dikembangkan penggunaan bahan alami pada proses pembentukan nanopartikel. Pada penelitian ini, biosintesis nanopartikel ZnO dilakukan menggunakan ekstrak kulit Ananas comosus sebagai agen capping sekaligus agen pereduksi. Seng nitrat digunakan sebagai prekursor dari ion seng, sedangkan kulit nanas dibuat menjadi ekstrak untuk dimanfaatkan kandungan antioksidannya. Sampel ZnO dipelajari sifat fisisnya dari hasil karakterisasi X-ray diffraction (XRD), scanning electron microscopy (SEM) dan spektroskopi UV-Vis. Berdasarkan pola XRD, nanopartikel ZnO memberikan fasa kristal heksagonal wurtzite dengan ukuran kristal 14 nm. Morfologi SEM masing-masing sampel didapatkan berbentuk bunga atau micro-nanoflower dengan ukuran diameter rata-rata 510 nm dan 560 nm untuk sampel 0,01 M dan 0,025 M. Hasil spektrum absorbansi UV-Vis menunjukkan peningkatan puncak penyerapan cahaya dengan penambahan konsentrasi seng ni...
Fabrication of Carbon Electrodes from Sago Midrib Biomass with Chemical Variation for Supercapacitor Cell Application
Journal of Physics: Conference Series, 2021
Activated carbon with high porosity and controlled pores structure are widely applied as supercap... more Activated carbon with high porosity and controlled pores structure are widely applied as supercapacitor electrodes biomass derived from sago midrib (PS). Activated carbon based on sago midrib without chemical agent and using chemical agent ZnCl2 and NaOH by a concentration 0,5 M has been fabricated with a purpose to produce distribution of mesopores and micropores. Samples were carbonized at temperature 600°C using N2 gas followed by a physical activation process using CO2 gas at temperature of 700°C. The highest mass loss percentage of carbon electrode PS-ZnCl2 was 51,6% Microstructure analysis shows that amorphous structure for the activated carbon electrodes is shown by the presence of the peaks of 2θ around 240 and 440 with the highest Lc presented by ZnCl2. SEM characterization showed the domination of mesopores and a few of micropores presented by ZnCl2. EDX characterization showed the highest atomic carbon percentage is 90,27%. Specific capacitance was determined by cyclic vo...
Low-cost activated carbon bio-wasted-based for enhanced capacitive properties of symmetric supercapacitor
Journal of Physics: Conference Series, 2021
Low-cost, abundant, simple, and facile approaches to exhibit bio-waste-based porous carbon are ne... more Low-cost, abundant, simple, and facile approaches to exhibit bio-waste-based porous carbon are needed to enhance the high performance of electrode materials as energy storage devices. Here, the bio-waste-based activated carbon with a low-cost and easy-to-prepare approach was studied via chemical impregnation of ZnCl2 at single-stage integrated high-temperature pyrolysis. Furthermore, the activated carbon is prepared in the form of a monolith by optimizing the self-adhesive properties of the precursor. The application of different chemical concentrations can significantly improve the material properties with relatively good amorphous carbon structures. Furthermore, the maximum surface area was found to be 1129 m2 g−1. Moreover, it exhibits high electrochemical behavior with a specific capacitance of 145 Fg−1 at a constant current density of 1.0 Ag−1. In addition, the highest energy density was found at 16.25 Whkg−1 with a maximum power density of 82.70 Wkg−1 in 1 M H2SO4 aqueous elec...
Analysis of Ferroelectric Thin Film BaZr0.6Ti0.4O3 with Annealing Temperature Increase Variations Using x-ray Diffraction
Journal of Physics: Conference Series, 2020
Ferroelectric is a dielectric material which has spontaneous polarization and has the ability to ... more Ferroelectric is a dielectric material which has spontaneous polarization and has the ability to change its internal polarization using a suitable electric field. The aim of this research is to decrease the FWHM value and increase the crystal size so that the dielectric constant increases for capacitor applications. Thin film ferroelectric material of Barium Zirconium Titanate (BZT) with the composition BaZr0.6Ti0.4O3 was prepared using the sol-gel method. The substrate used was FTO glass which has been treated etching and coated with BZT and in annealing at 800° C with annealing temperature increase of 5°C and 10°C. Samples were characterized using XRD with an angle interval of 2θ between 20° to 60°. The results of XRD characterization show that there were peaks indicating that there was a crystal structure. The resulting crystal structure was in a plane 100 at an angle of 2θ = 22.55°, a plane 110 at an angle of 2θ = 32.00°, a plane 111 at an angle of 2θ = 38.54°, and a plane 200 a...
Anti-Reflecting Coating to Improve the Performance of Polycrystalline Photovoltaic Module
Journal of Physics: Conference Series, 2020
Photovoltaic performance module (PV) is affected by surface temperature panel, which can reduce o... more Photovoltaic performance module (PV) is affected by surface temperature panel, which can reduce output efficiency represented by output power and internal parasitic resistance. Series resistance (Rs) and shunt resistance (Rsh) are needed to determine the characteristics and performance of PV modules for long-term operations. In this work, an anti-reflecting coating (AR layer) has been used to improve the efficiency of solar cells and to determine the stability of the parasitic resistance Rs and Rsh. A 10Watt Visero Polycrystalline PV module coated with AR layer is irradiated using direct sunlight, and using an artificial light of 500W halogen lamp at various temperature ranges from 30 °C to 60 °C. Rs and Rsh are determined based on the current-voltage curve using three parameters; short circuit current, open-circuit voltage, and the maximum power point generated for the Lambert-W calculation. Results show an increase of 11% output power using AR coated module, while the internal res...
Sains Malaysiana, 2020
Pristine ZnO and selenium doped ZnO (Se-ZnO) nanorods were successfully synthesized using seed-me... more Pristine ZnO and selenium doped ZnO (Se-ZnO) nanorods were successfully synthesized using seed-mediated hydrothermal method. The growth solution of both pure and Se-doped ZnO nanorods employed zinc nitrate hexahydrate (ZNH) and hexamethylenetetramine (HMT) as a precursor and surfactant, respectively. As a dopant source, selenium salt solution was obtained by reacting selenium powder with sodium borohydride at low temperature. The as-prepared pure ZnO and Se-doped ZnO nanorods were characterized using field effect scanning electron microscopy (FESEM), X-ray diffraction (XRD), UV-Visible spectroscopy (UV-Vis), and Photoluminescence (PL) spectroscopy. FESEM images show that the geometric shape of Se-ZnO nanoparticles is nanorods with a hexagonal cross-section. The XRD pattern shows the diffraction peak of the sample at the angles of 2θ: 34.44°, 36.25° and 47.54° which represents the hkl plane of (002), (101) and (102), respectively. The crystalline size calculated from XRD data is foun...
Journal of Aceh Physics Society, 2020
Abstrak. Ferroelektrik merupakan bahan yang mempunyai polarisasi spontan serta mempunyai kemampua... more Abstrak. Ferroelektrik merupakan bahan yang mempunyai polarisasi spontan serta mempunyai kemampuan mengubah polarisasi internalnya dengan menggunakan medan listrik yang sesuai. Ferroelektrik juga diaplikasikan sebagai kapasitor. Material ferroelektrik buat dalam bentuk film tipis. Barium Zirconium Titanate (BZT) dengan komposisi BaZr0.4Ti0.6O3 dibuat menggunakan metode sol-gel. Substrat yang digunakan yaitu FTO yang telah di etching dan di lapisi BZT serta di annealing pada suhu 800°C selama 2 jam dengan kenaikan laju suhu annealing yaitu 5°C dan 10°C. Sampel di karakterisasi menggunakan XRD. Hasil karakterisasi XRD menunjukkan adanya puncak-puncak yang menandakan terdapat struktur kristal. Struktur kristal yang dihasilkan berada pada bidang 100 pada sudut 2θ = 22.78°, bidang 110 pada sudut 2θ = 32.17°, bidang 111 pada sudut 2θ = 38.42°, bidang 200 pada sudut 2θ = 47.73°. Struktur yang dihasilkan pada penelitian ini yaitu tetragonal dimana a = b = 3.91 nm dan c = 4.05 nm. Laju ken...
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Papers by Ari Sintya Rini