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All Journal Reaktor International Journal of Renewable Energy Development Jurnal Sains Materi Indonesia Jurnal Keteknikan Pertanian SAINS TANAH - Journal of Soil Science and Agroclimatology Spektra: Jurnal Fisika dan Aplikasinya Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Ilmu Fisika PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Indonesian Journal of Physics (IJP) International Journal of Renewable Energy Development Biodiversitas Journal of Biological Diversity

Irmansyah Irmansyah

Departemen Fisika, FMIPA - IPB Kampus IPB Darmaga, Bogor

Author-ID : 2793521

Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics Other

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THE USE OF POLYMER GEL ELECTROLYTE CONTAINING I-/I3- REDOX COUPLE TO ASSEMBLY A SOLID STATE DYE SENSITIZED TiO2 SOLAR CELL Akhiruddin Maddu; Irmansyah Irmansyah; Mahfuddin Zuhri
Jurnal Sains Materi Indonesia Vol 9, No 1: OKTOBER 2007
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

THE USE OF POLYMER GEL ELECTROLYTE CONTAINING I-/I3- REDOX COUPLE TO ASSEMBLY A SOLID STATE DYE SENSITIZED TiO2 SOLAR CELL. A solid state dye sensitized TiO2 nanocrystalline solar cells was assembled employing a polymer gel electrolyte contains of iodide/triiodide (I-/I3-) redox couple. The use of solid electrolyte based on polymer matrix for redox ‘couples is aimed to overcome several problems of liquid cell, such as leaks of electrolyte that result in degradation of solar cell. TiO2 nanocrystalline layer was grown on TCO glass substrate by doctor blade technique was stained by synthetic dye Ruthenium 535 for a day. To complete the cell, a polymer gel based on poly(ethylene glycol) (PEG) containing I-/I3- redox couple was sandwiched between a working electrode (nanoporous TiO2 layer on conductive glass substrate) and a counter electrode (graphite sheet). The solid-state cell does not need a clipp, so the gel polymer electrolyte also acts as a glue to join the electrodes. Two cells assembled with different amount of I-/I3- redox couple used in each cell, one of cell use 20 drops of Iodolyte (contains (I-/I3- redox couple) and another cell use 30 drops of Iodolyte solution (purchased fromSolaronix, SA). The cells were characterized their photovoltaic performances included: open-circuit voltage (Voc), short-circuit current (Isc),maximum power (Pmax), fill factor (FF) and energy conversion efficiency.

STRUKTUR DAN SIFAT OPTIK FILM ZnO HASIL DEPOSISI DENGAN TEKNIK SPIN-COATING MELALUI PROSES SOL-GEL Akhiruddin Maddu; Candra A. Basuki; Irmansyah Irmansyah; Sidikrubadi Pramudito
Jurnal Sains Materi Indonesia Vol 7, No 3: JUNI 2006
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

STRUKTUR DAN SIFAT OPTIK FILM ZnO HASIL DEPOSISI DENGAN TEKNIK SPIN-COATING MELALUI PROSES SOL-GEL. Film ZnO telah dibuat pada substrat kaca dengan teknik deposisi spin coating melalui proses sol-gel. Pembuatan film ZnO dari prekursor zinc acetate dengan laju putaran 3.000 rpm selama 60 detik di atas pelat spin coater. Film yang diperoleh dikeringkan pada suhu ruang kemudian dilakukan annealing pada suhu 500 oC selama 3 jam. Hasil XRD menunjukkan bahwa film ZnO yang terbentuk adalah polikristal wurtzite heksagonal dengan nilai parameter kisi masing-masing adalah a = 3,290 Å dan c = 5,2531 Å. Ukuran kristal rata-rata ZnO adalah 29,554 nm. Berdasarkan morfologi permukaan hasil foto SEM menunjukkan film ZnO berbentuk lempengan-lempengan (disks) yang tidak seragamdan tidak beraturan. Karakterisasi spektroskopi UV-Vis menghasilkan karakteristik optik film ZnO, yaitu spektrum transmitansi optik dalam rentang panjang gelombang 370 nm sampai dengan 970 nm. Dari data spektrum UV-Vis tersebut ditentukan lebar celah energi ZnO sebesar 3,2 eV.

The Release of Fertilizer on Corncob Cellulose – Based Acid-Acrylamide Hydrogel Prepared by Chemical Cross-Binding Method Renda Amalia Anggraini; Mersi Kurniati; Christina Winarti; Irmansyah Irmansyah
Reaktor Volume 21 No. 3 September 2021
Publisher : Dept. of Chemical Engineering, Diponegoro University

Farmers' knowledge of the amount and dosage of fertilizers recommended for a practical fertilization system is low. As the result, the plant does not fully absorb the given fertilizer. Some fertilizers are leached by the flowing water and wasted into the soil layer. In long term basis, this practice can cause environmental pollution, especially on the land, water and air. Due to this fertilization problem in agriculture practice, a material with a high-water absorption capacity, which further releases it together with the fertilizer over a desirable period of time, is needed. One way to effectively provide water and nutrients to the plants and improve the physical and chemical properties of the fertilizzer is by the application of hydrogel. In this work, the release of urea fertilizer in a hydrogel-based on corncob cellulose was prepared using N, N'-Methylene Bis-acrylamide (MBA) as a crosslinker was studied. This research aims to produce a hydrogel with good physical and mechanical properties using acrylamide based on corn cobs cellulose and can be applied as a fertilizer carrier matrix whose structure can regulate fertilizer release. The treatments tested were MBA concentrations of 0%, 1%, and 2%, while the ratio of cellulose: solvent was 1: 2 and the addition of urea fertilizer with a concentration of 5%. The results showed that the swelling value increased with increasing acrylamide in the treatment ratio of the concentration of cellulose: acrylamide-acrylamide (NS: AAm). Fertilizer factors also gave a good swelling value. This shows that the addition of fertilizers gives maximum results. The hydrogel with the best treatment, namely the concentration ratio of 1% MBA, produced a swelling value of 7633.3%, a gel fraction of 76.51%, 1.73 miligram fertilizer loading, fertilizer release by 2.9%, a hardness of 7,865 N, with the morphology showing urea crystals in the form of white spots and showing the results of a slow but optimum release rate of fertilizer so that it can be applied for agriculture that requires a lot of nutrients at the beginning of growth.Keywords: corncorb; cellulose; hydrogel; N’,N’-Methylene Bis-acrylamide (MBA), slow released fertilizer

Pengaruh Milling Terhadap Karakteristik Nanopartikel Biomassa Rotan Aminah Balfas; Irmansyah -; Siti Nikmatin; Agus Sukarto
Jurnal Keteknikan Pertanian Vol. 4 No. 1 (2016): JURNAL KETEKNIKAN PERTANIAN
Publisher : PERTETA

AbstractThe huge availability of rattan biomass is a fiber rich natural resource that resulted from rattan processing. Nanoparticles biomass is selected material with high potential to be further developed and studied as filler composites, which rattan has better mechanical physical properties than synthetic. Thefiber objective of this study is to obtain natural fiber nanoparticles from rattan biomass as a reinforcing material of PP (Polypropylene) using milling method with time variation of 15, 30 and 45 minutes. The result of using milling method with Herzong tool, the optimum milling time ws 30 minutes with an average particle size of 24.35 nm in the range 15:49 24.35 - 48.99 through PSA test equipment, which using the method ofdistribution comulant amount (number), the surface morphology of nanoparticles fiber rattan skin shows the longer time milling, the smaller the particle size, and ACS amounted to 0.9833 Å (0.09833 nm) with a FWHM 0.1557 rad.AbstrakKetersediaan biomassa rotan yang melimpah merupakan sumber daya alam kaya serat yang dihasilkan dari pengolahan rotan. Nanopartikel biomassa rotan merupakan pilihan material yang sangat potensial untuk dikembangkan dan diteliti lebih lanjut sebagai filler komposit yang memiliki sifat fisis mekanik lebih baik dari sintesis. Tujuan penelitian ini adalah untuk memperoleh nanopartikel serat alam dari biomassa rotan sebagai bahan penguat polipropilen (PP) menggunakan metode milling dengan variasi waktu 15 menit, 30 menit, dan 45 menit. Hasil dari menggunakan metode milling dengan alat Herzong didapatkan waktu milling optimum 30 menit dengan rata-rata ukuran partikel 24.35 nm dalam rentang 15.49 - 48.99 nm melalui ala uji PSA yang menggunakan metode akumulasi distribusi jumlah (number), Morfologi permukaannanopartikel serat kulit rotan menunjukkan semakin lama waktu milling, semakin kecil ukuran partikelnya, dan ACS sebesar 0.9833 Å (0.09833 nm) dengan FWHM 0.1557 rad.

INTERNET OF THINGS: AUTOMATIC PLANT WATERING SYSTEM USING ANDROID Ridwan Siskandar; Muhammad A Fadhil; Billi Rifa Kusumah; Irmansyah Irmansyah; Irzaman Irzaman
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 9, No 4 (2020): Desember 2020
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v9i4.297-310

Internet of Things (IoT) is a system that connects devices directly or indirectly to the internet. The device can work with remote control. One application of the IoT system on the watering system is able to provide an approach to the ease in the process of growth and development of plants. The research carried out was applied to an IoT-based smart plant watering device. The tool is supported with a soil moisture measuring sensor that acts as a benchmark to determine the condition of soil moisture and automatic control of the process of watering plants. The process of watering plants is scheduled in the morning and evening. Information, as long as the device is run will be displayed on the LCD and screen of an Android-based smartphone application. The data can be a comparison value to determine the suitability of soil moisture data in plants. The volume of water supplied in the watering process also affects the level of soil moisture. IoT-based smart plant sprinklers can automate watering by measuring the percentage of soil moisture as a benchmark for providing water during the watering process. Remote watering control can also be done on this tool by using a WiFi signal to the same access point that is connected to the smartphone client and microcontroller. Keyword: agriculture, automatic sprinklers, engineering, IoT

PENERAPAN REKAYASA MESIN SORTIR SEBAGAI PENENTU KEMATANGAN BUAH JERUK DAN TOMAT MERAH BERBASIS IMAGE PROCESSING Ridwan Siskandar; Noer A Indrawan; Billi Rifa Kusumah; Sesar Husen Santosa; Irmansyah Irmansyah; Irzaman Irzaman
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 9, No 3 (2020): September 2020
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v9i3.222-236

The embedded systems in the industrial, especially image processing, is increasingly leading to the study of production automation systems such as fruit sorting. Post-harvest sorting system implemented by the industry is manual, so it’s not effective. The solution was to conduct research aimed at modifying post-harvest sorting tools by engineering tomato and orange sorting machines based on their color. The method uses image processing. It’s the most efficient alternative in terms of cost and complexity of hardware design, does not require many sensors, but produces an accurate output. The camera is placed on the mechanical sorting machine system, taking images to determine the sorting execution after the fruit color type are recognized. The results of the research were carried out through several tests, namely: light intensity, color image data, and organoleptics. Light intensity test showed that the position of the tool had a value of 0.78% of the outside light disturbance. Color image shows the range of ripeness values (R/G) for raw tomatoes 0<=1.04; half ripe tomatoes 1.04<=1.39; ripe tomatoes 1.39<=3.59; raw orange 0<=0.92; undercooked oranges 0.92<=0.98; and ripe oranges 0.98<=1.66. Organoleptic test from five observers had the same results as the reading on the fruit sorting tool. Keywords : engineering, fruit maturity, oranges, sorting machines, tomatoes

ANALYSIS OF LATTICE PARAMETER, ERROR, AND THE BANDGAP ENERGY IN CADMIUM SULFIDE (CdS) SEMICONDUCTOR MATERIAL Kamelia Fikriah; Talitha Alya Syaharani; Fitri Melinda; Lulu Lutfiah; Nada Huwaidah; Agnes Tiara Vinanda; Indriyati Rahmi Setyani; Meutia Awani; Alfi Afriliani; Irmansyah Irmansyah; Irzaman Irzaman
Spektra: Jurnal Fisika dan Aplikasinya Vol 6 No 2 (2021): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 6 Issue 2, October 2021
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.062.04

Has successfully analyzed the lattice parameter, error, and energy band gap of Cadmium Sulfide (CdS) material. CdS is a semiconductor material. In this study, the CdS used is a material with a cubic crystal structure using database from the International Center for Diffraction Data (ICDD), then the data is calculated using the Cramer-Cohen method. From these data the resulting lattice parameter of a = b = c = 5.823791777 Å with an average error of 0.00034%. The band gap energy calculation of CdS material is 2.477 eV.

THE SIMULATION AND DATA ANALYSIS OF TEMPERATURE SENSOR Hilal Fauzi Ramadhan; Retno Dwi Kartika Sari; Adnan Prasetyo Alamsyah; Adrian Fadhillah; Rizki Nurhikmah; Sarah Aribah Miftahulfallah; Widya Rahma; Ari Firia; Dea Amelia Saputri; Irmansyah Irmansyah; Irzaman Irzaman
Spektra: Jurnal Fisika dan Aplikasinya Vol 6 No 2 (2021): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 6 Issue 2, October 2021
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.062.06

The study have successfully simulated 40 units data of temperature sensor during heating process and cooling process. Simulated data in temperature sensor has interval time 3 to 18 seconds for 5 iterations that are combined with other 7 data temperature sensor until get 40 data iterations. The data which has been simulated and then plotted into a graph with the x-axis is time and y-axis is average heating process or cooling process. The graph formmed cupped-down with quadratic function for heating process and cupped-up for cooling process.

THE PARAMETER ANALYSIS OF CUBICAL STRUCTURED CADMIUM TELLURIDE (CdTe) SEMICONDUCTOR MATERIALS Sinta Puspita Apriliani; Susi Susilawati; Koharudin Koharudin; Sarah Nabilah; Dwi Lestariningsih; Witri Desmulyani; Anis Munir Rukyati; Muhammad Fikri Fakhrurozi; Stefiana Sondary Az Zahrah; Irmansyah Irmansyah; Irzaman Irzaman
Spektra: Jurnal Fisika dan Aplikasinya Vol 6 No 2 (2021): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 6 Issue 2, October 2021
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.062.05

Cadmium telluride (CdTe) semiconductor materials will be used to analyze the energy gap, lattice parameters, and error value of these cubical structured crystal materials. The data that we used to be analyzed is using data from the International Center for Diffraction Data (ICDD) that used the X-ray Diffraction (XRD) method. This research has been successfully analyzing energy gap, lattice parameters, and the error value of Cadmium telluride (CdTe) materials which have a cube-shaped crystal structure. The result of the gap energy analysis of Cadmium telluride (CdTe) with a cubical structure yields a value of 1.43 eV. The lattice parameters of Cadmium telluride (CdTe) with a cubical structure analyzed by the Cramer-Cohen method yields a value of a = b = c = 9.922 Å. The error value of Cadmium telluride (CdTe) with a cubical stcucture yields a value of 6.75 x 10-4 %.

Effect of Different Hydrothermal Temperatures on the Properties on Nano-Silica (SiO2) of Rice Husk Irzaman Irzaman; Irmansyah Irmansyah; Siti Aisyah; Nazopatul Patonah Har; Aminullah Aminullah
International Journal of Renewable Energy Development Vol 11, No 3 (2022): August 2022
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2022.43904

Rice husk has high silica (SiO2) content and can be used as the primary material for making nano-silica. One of the methods for synthesizing nano-silica was the hydrothermal method. The objective of this study was to synthesize nano-silica from rice husks by observing the effect of temperature in the hydrothermal process on the structure, electrical and particle properties of nano-silica. The hydrothermal process temperature was 150, 200, and 250 °C for 4 hours. The results showed that all nano-silicas were in the amorphous phase. The particle size was in the range of 0.16-13.49 nm with more uniform size distribution on nano-silicas of 200 °C and 250 °C than nano-silica at 150 °C. These three nano-silicas were included in the semiconductor category by increasing temperature and frequency. In addition, these treatment variations resulted 200 °C for 4 hours and pressure of 2 atm as the optimum treatment for manufacturing nano-silica of rice husk ash. This nano-silica could be used as semiconductor material for electronic industry.

Co-Authors A. Harsono Supardjo Ade Kurniawan Adnan Prasetyo Alamsyah Adrian Fadhillah Agnes Tiara Vinanda Agus Kartono Agus Sukarto Akhiruddin Maddu Alfi Afriliani Aminah Balfas Aminullah Aminullah Ana Fitriana Anis Munir Rukyati Ari Firia Aris Purwanto Arya Rezavidi Billi Rifa Kusumah Candra A. Basuki Christina Winarti Dea Amelia Saputri Dendy Handy Saputra DEWI SARTIAMI Dwi Lestariningsih Fitrah Hadi Firdaus Fitri Melinda Gagat Mughni Pradipta GILLIAN W. WATSON Halimah Sa'diyah Hannif Izzatul Islam Heriyanto Syafutra Hilal Fauzi Ramadhan Hilda Meiranita Prastika Dewi I Wayan Budiastra IDHAM SAKTI HARAHAP Indriyati Rahmi Setyani Irlian Nurmaniah Irzaman, Irzaman Kamelia Fikriah Koharudin Koharudin Lulu Lutfiah Mahfuddin Zuhri Maya Risanti Mersi Kurniati Meutia Awani Mila Seri Rezeki Muhammad A Fadhil Muhammad Fikri Fakhrurozi Muhammad Firman Azima Nada Huwaidah Nazopatul Patonah Har Nida Nabilah Noer A Indrawan Pramudito, Sidikrubadi Renda Amalia Anggraini Retno Dwi Kartika Sari Ridwan Siskandar Rizki Nurhikmah Rofiqul Umam Salamet Nur Himawan Sarah Aribah Miftahulfallah Sarah Nabilah Sesar Husen Santosa Sigit Ahmad Fatoni Sinta Puspita Apriliani Siti Aisyah Siti Nikmatin Sofyan Sa'id Atsaurry Stefiana Sondary Az Zahrah Susi Susilawati Talitha Alya Syaharani Verra Mellyana Widya Rahma Witri Desmulyani

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