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All Journal J-Sil (Jurnal Teknik Sipil dan Lingkungan) BERKALA FISIKA Jurnal Ilmu Dasar Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Sains Materi Indonesia Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) TELKOMNIKA (Telecommunication Computing Electronics and Control) Jurnal Pendidikan Fisika Indonesia Jurnal Matematika & Sains Journal of Mathematical and Fundamental Sciences Journal of Engineering and Technological Sciences Widyariset Science and Technology Indonesia Indonesian Journal of Chemistry Jurnal Otomasi Kontrol dan Instrumentasi WIDYA LAKSANA Jurnal Teori dan Aplikasi Fisika Indonesian Journal of Electrical Engineering and Computer Science Widyariset El-Hekam : Jurnal Studi Keislaman Pharmaceutical Sciences and Research (PSR) Indonesian Journal of Physics (IJP)

Khairurrijal Khairurrijal

Kelompok Keilmuan Fisika Material Elektronik, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Teknologi Bandung

Author-ID : 297948

Aerospace Engineering Astronomy Automotive Engineering 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 Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Physics Social Sciences Transportation Other

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LUMINESCENCE NANOPARTIKELEMISI CAHAYATAMPAK SEBAGAI TINTAPENGAMAN Widhya Budiawan; Aunuddin Syabba; Mikrajuddin Abdullah; Khairurrijal Khairurrijal
Jurnal Sains Materi Indonesia EDISI KHUSUS: OKTOBER 2006
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

LUMINESCENCE NANOPARTIKELEMISI CAHAYATAMPAK SEBAGAI TINTAPENGAMAN. Nanopartikel ZnO disintesis dengan metode sol-gel dengan menggunakan LiOH sebagai agen hidrolisisnya. Hasil sintesis dikarakterisasi dengan difraksi sinar X (XRD) untuk mengkaji kristalinitas dan UV Vis untuk menentukan lebar celah pita energi. Koloid nanopartikel yang dihasilkan memiliki ukuran sekitar 3 nm yang menghasilkan celah pita energi sekitar 3,53 eV. Kristalinitas nanopartikel dipengaruhi oleh konsentrasi LiOH yang digunakan. ZnO berukuran 3 nm dapat menghasilkan luminescence cahaya biru jika disinari ultraviolet. Pembesaran ukuran partikel menyebabkan pergeseran luminescence ke arah merah. Luminescence cahaya tampak pada koloid dimanfaatkan sebagai tinta pengaman. Pada penelitian ini juga dilaporkan uji tinta menggunakan nanopartikel dengan memvariasikan sejumlah parameter seperti jenis kertas, warna kertas dan komposisi tinta.

DEPOSISI FILM TIPIS CERIA DIDADAH Nd MENGGUNAKAN TEKNIK PULSED-LASER ABLATION DEPOSITION (PLAD) lis Nurhasanah; Khairurrijal .; Mikrajuddin Abdullah; Bambang Ariwahjoedi; Maman Budiman; Sukirno .
Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Vol 7, No 2 (2006): Agustus 2006
Publisher : BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jstni.2006.7.2.2137

DEPOSISI FILM TIPIS CERIA DIDADAH Nd MENGGUNAKAN TEKNIK PULSED-LASER ABLATION DEPOSITION (PLAD). Film tipis ceria didadah Nd (Nd-doped ceria/NDC) telah berhasil dideposisikan di atas substrat Si(100) pada ~temperatur 400°C menggunakan teknik pulsed-laser ablation depostion (PI‑AD) dalam kondisi vakum dan tekanan 02 antara 15 - 29 mTorr. Analisis difraksi sinar-x, scanning electron microscopy (SEM), dan energy dispersive x-ray (EDX) digunakan untuk mengamati struktur, ketebalan dan komposisi kimia film. Hasil studi ini menunjukkan bahwa tekanan 02 selama proses deposisi menentukan kristalisasi, ketebalan film dan komposisi atom dalam film. Film tipis NDC dengan struktur kompak dan komposisi beragam yang diperoleh menunjukan bahwa teknik PLAD berpotensi untuk menghasilkan film tipis elektrolit yang penting bagi solid electrolyte fuel cell (SOFC).

Fabrication of Microporous Water Filter Using Titanium Dioxide Particles, Silica Particles, and Polyethylene Glycol Aris Priatama; Mikrajuddin Abdullah; Khairurrijal Khairurrijal; Hernawan Mahfudz
Journal of Engineering and Technological Sciences Vol. 42 No. 1 (2010)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.eng.sci.2010.42.1.3

We report the fabrication of microporous filter for use in filtering both inorganic and organic substances from liquid materials. Titania (TiO 2) anatase was used as the main material for this filter. Polyethylene glycol (PEG) with average molecular weight of 20,000 was also used as additive to control the formation of pores, especially pore sizes. The mixture of titania and PEG was pressed into cylindrical tablet shape at room temperature and then simply heated inside a furnace up to temperature where the PEG decomposed into gas to leave only connected titania particles. The use of titania as base material for the filter allows the organic substances that trapped inside the filter pores to be easily removed by heating up the used filter at above decomposition temperature of the trapped organics. We also made other filter by adding small amount of silica (SiO2) particles to reduce the size of the pores as well as to improve the mechanical strength. We observed that filters containing silica particles, with smaller in size compared to titania, resulted in better mechanical strength, smaller in pore sizes and better filtering results in term of turbidity and dissolved oxygen (DO) content. This method is potential for development of larger scale and cheaper water filters for use in various applications.

Axial and Lateral Small Strain Measurement of Soils in Compression Test using Local Deformation Transducer Hasbullah Nawir; Dayu Apoji; Riska Ekawita; Khairurrijal Khairurrijal
Journal of Engineering and Technological Sciences Vol. 50 No. 1 (2018)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2018.50.1.4

This paper presents the development of a method using local deformation transducers (LDTs) to locally and sensitively measure small axial and lateral strains in soil in a compression test. A local strain measurement system comprising of axial and lateral LDTs was developed referring to the original LDT system and the cantilever LDT system, respectively. The LDTs were calibrated both in air and under water. Their insensitivity to pressurized water was confirmed. The calibration factors for the axial and lateral LDTs were found to be 1.695 mm/volt and 1.001 mm/volt, respectively. The performance in terms of repeatability and stability of the LDT system was evaluated. The repeatability test showed that the average standard deviation of the lateral LDT was 0.015 volt, while the stability test showed that the average standard error of the axial and lateral LDT were 3.13 Ã— 10-5 volt and 2.65 Ã— 10-5 volt, respectively. Unconfined compression tests were conducted on three reconstituted clay samples to examine the proposed axial and lateral LDT system. The stress-strain relationship indicates a nonlinear relationship between the axial and lateral strain of soil instead of the conventionally assumed constant relationship. The results demonstrate this nonlinear behavior even at small strain levels, which were successfully measured using a domestically built axial and lateral LDT system.

Effect of Polystyrene Latex Addition on Size and Pore Volume of Porous Calcium Oxide Particles Prepared by Spray-Pyrolysis Method and Its Ability for SO2 Retention Ricky Dwi Septianto; Ferry Iskandar; Mikrajuddin Abdullah; Khairurrijal Khairurrijal; Lee Myong Hwa
Journal of Engineering and Technological Sciences Vol. 50 No. 2 (2018)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2018.50.2.6

In this study, the effects of polystyrene (PS) latex addition on the particle morphology and the pore content of calcium oxide (CaO) were investigated. The CaO particles were prepared using an ultrasonic nebulizer-assisted spray-pyrolysis method with variation of the PS/Ca(NO3)2·4H2O mass ratio in the precursor. Good crystallinity of CaO was obtained at 825°C of synthesis temperature under 2 l/min of nitrogen gas flow, which was confirmed by Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). According to scanning electron microscope (SEM) characterization, the CaO particles synthesized with 0 and 25 wt% PS addition had an almost spherical shape with an average size of 1.58 and 1.48 µm, respectively. In addition, macropores were formed in the CaO particles prepared with 25 wt% PS addition that had an average pore diameter of 583.26 nm. Meanwhile, the CaO particles prepared with 75 wt% PS addition had a random shape and an average size of 1.41 µm. The mesopore content was investigated by Barret-Joyner-Halenda (BJH) analysis, which showed improvement of the pore size from 3.45 nm to 5.42 nm for 0 and 25 wt% PS addition, respectively, which is proportional to the pore volume, pore surface area, and the capacity of SO2 retention.

Kekuatan Struktur Jembatan terhadap Beban Gempa (Studi Kasus: Jembatan Cisomang Tol Purbaleunyi STA 100+700): Strength Analysis of Bridge Structure Based on Earthquake Load (Case Study: Cisomang Bridge Pubaleunyi Toll STA 100+700) Khairurrijal; Muhammad Fauzan; Sekar Mentari
Jurnal Teknik Sipil dan Lingkungan Vol. 7 No. 1: April 2022
Publisher : Departemen Teknik Sipil dan Lingkungan, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.7.1.17-32

Kejadian-kejadian gempa besar yang pernah terjadi di Indonesia, mengisyaratkan bahwa upaya preventif perlu dilakukan dalam perancangan struktural pada suatu jembatan. Tujuan dari penelitian ini adalah menganalisis besarnya gaya dalam maksimum pada kondisi layan dan ultimit, menghitung jumlah tulangan PCI girder dan pier column, serta menganalisis periode getar, kekakuan struktur, dan displacement yang terjadi. Penelitian menggunakan data sekunder as built drawing jembatan berupa data gambar dan dimensi girder, deck, pier head, dan pier column serta data material Jembatan Cisomang. Metode yang digunakan adalah pemodelan dan analisis gaya dalam menggunakan software CSI Bridge ver 22. Nilai kekakuan dari struktur Jembatan Cisomang didapatkan sebesar 176.682,1 kN/m. Besarnya perpindahan yang terjadi masih dibawah nilai displacement izin sebesar 168 mm. Girder dapat menahan momen dengan jumlah tendon 21 diameter 13 mm dan tulangan lentur (162D16). Namun, jumlah tendon dan tulangan lentur tersebut tidak memenuhi syarat tulangan lentur maksimum. Tulangan eksisting pada pier column mampu menahan gaya dalam yang bekerja sehingga tidak diperlukan tambahan tulangan.

A STUDY ON APPLICATION ZINC OXIDE (ZNO) NANOPARTICLES AS SECURITY INK FOR VALUABLE DOCUMENTS Widhya Budiawan; Mikrajuddin Abdullah; Khairurrijal Khairurrijal
Widyariset Vol 15, No 2 (2012): Widyariset
Publisher : Pusbindiklat - LIPI

Ink made from zinc oxide (ZnO) nanoparticles colloid has been synthesized by using a sol-gel method. Employing an XRD, it was obtained that the sizes of particles were around 3–4 nm. Utilizing a UV-Vis spectrometer, it was found that the band gap energies were 3.5 and 3.45 eV for the sizes of 3 and 4 nm, respectively. For the purpose of testing the ink effectiveness, the ZnO colloid was mixed with polyethylene glycol (PEG) 400 or glycerine. Using pure ZnO colloid as printer ink, invisible characters under natural illumination had been successfully printed on specific papers. Under ultraviolet (UV) illumination, the invisible characters became visible. The developed ink, therefore, has potential applications for security of bank notes or passbooks.

Silver Nanorods Layer Based on Polyvinyl Alcohol on Glass Substrates by Dip-Coating Method Junaidi Junaidi; Agus Riyanto; Kuwat Triyana; Khairurrijal Khairurrijal
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 9 No. 1 (2019)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v9n1.p1-9

This research reports the investigation of the performance of a thin layer based on silver nanorods using the dip-coating method. The synthesis was conducted by polyol method at an oil bath temperature of 140 °C. In the synthesis of silver nanorods, materials used were silver nitrate (AgNO3) as the main raw material, ethylene glycol (EG) as the solvent, and a small amount of sodium chloride (NaCl) as a mediated-agent (precursor). Polyvinyl alcohol (PVA) used as a capping agent and stabilizer in this process. Diameter and length of silver nanorods were 800 nm and 15 µm, respectively. Furthermore, the silver nanorods suspension was deposition onto a glass substrate with a variety of dipping cycles. The result showed the thickness of the thin layer is linear with a number of dipping cycles. Electrical and optical properties of thin layer show that sheet resistance about of 30 Î© sq-1 by transmittance above of 80%. The silver nanorods thin film can be used as a conductive and transparent electrode for various optoelectronic applications.

Effect of Thickness and Temperature of SiO2 Layer on Leakage Currents in MOS Capacitor Materials with High Dielectric Constant by Involving the Charge Trap Fatimah A. Noor; Masturi Masturi; Mikrajuddin Abdullah; Khairurrijal Khairurrijal
Jurnal ILMU DASAR Vol 15 No 1 (2014)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Modeling of the leakage current in a field-effect transistor metal-oxide-semiconductor (MOSFET) with high dielectric material has been developed by taking into account the effect of charge traps formed at the interface of high-k material/SiO2. Transmittance calculated using Airy wave function approach and involving the anisotropic electron mass and the effect of coupling between transverse and longitudinal energy represented by the speed of the electrons in the metal gate. Transmittance obtained is then used to calculate the leakage current in the structure of n+Poly-Si/HfSiOxN/trap/SiO2/p-Si for oxide voltage variations, temperature, and thickness of the SiO2. From the calculation that the leakage current decreases with decreasing of oxide voltage and increasing of the thickness of the oxide layer of SiO2. Also obtained that the temperature of the device does not give a great influence on the change of leakage current. Keywords: Leakage current, electron speed, charge traps

Transmission Coefficient of an Electron through a Heterostructure with Nanometer-Thick Trapezoidal Barrier Grown on an Anisotropic Material Lilik Hasanah; Fatimah A. Noor; Khairurrijal Khairurrijal; Mikrajuddin Abdullah; Toto Winata; Sukirno Sukirno
Journal of Mathematical and Fundamental Sciences Vol. 38 No. 1 (2006)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.sci.2006.38.1.3

Transmission coefficient of an electron incident on a heterostructure potential with nanometer-thick trapezoidal barrier grown on anisotropic materials are derived by solving the effective-mass equation including off-diagonal effective-mass tensor elements. The boundary condition for an electron wave function (under the effective-mass approximation) at a heterostructure anisotropic junction is suggested and included in the calculation. The analytic expressions are applied to the Si(110)/Si0.5Ge0.5/Si(110) heterostructure, in which the SiGe barrier thickness is several nanometers. It is assumed that the direction of propagation of the electrons makes an arbitrary angle with respect to the interfaces of the heterostructure and the effective mass of the electron is position dependent. The transmission coefficient is calculated for energy below the barrier height, varying the applied voltage to the barrier. The transmission coefficient depends on the valley where the electron belongs and it is not symmetric with respect to the incidence angle.

Co-Authors A. Suhendi A. Y. Nuryantini A.A. Ketut Agung Cahyawan W Adhha, Nurul Adi Bagus Suryamas Adi Bagus Suryamas Adi Bagus Suryamas Afifah Rosyidah Agus Riyanto Ahmad Aminudin Ahmad Fahmi Alan Maulana Alan Maulana Alvian Hayu Sudibya Ambran Hartono Andika Putra Anrokhi, Mohamad Samsul Apoji, Dayu Arif Surachman Aris Priatama Aris Priatama Astuti Astuti Aunuddin Syabba Azzahwa, Taufik Bambang Ariwahjoedi Bambang Ariwahjoedi Bebeh Wahid Nuryadin Bimastyaji Surya Ramadan Cuk Imawan Darsikin Darsikin Dayu Apoji Deddy Kurniadi Djulia Onggo Edi Sanjaya Edi Wibowo Edy Wibowo Ekawita, Riska Endah Rahmawati Fatimah A. Noor Fatimah A. Noor Fatimah A. Noor Fatimah A. Noor Fatimah A. Noor Fatimah A. Noor Fatimah A. Noor Fatimah A. Noor Fatimah Arofiati Noor Fauzi Ahmad Bogas Ferry Iskandar Freddy Haryanto Freddy Haryanto H Mahfudz Hasbullah Nawir, Hasbullah Hermawan K. Dipojono Hernawan Mahfudz Hernawan Mahfudz Heru Susanto Hutapea, Alfon Hutwan Syarifuddin Hwa, Lee Myong Iis Nurhasanah Indra Wahyudin Fathonah Ismunandar Ismunandar Jarwinda Junaidi Junaidi Kurniawan, Setyo Budi Kuwat Triyana Lee Myong Hwa Lilik Hasanah Lilik Hasanah Lilik Hasanah lis Nurhasanah M. Barmawi M. M. Munir M. P. Ekaputra Maharati Hamida Maman Budiman Maman Budiman Maman Budiman Maman Budiman Maman Budiman Mamat Rokhmat Maria Evita Masturi Masturi Masturi Masturi Memoria Rosi Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajuddin Abdullah Mikrajuddin Mikrajuddin Mikrajuddin Mikrajuddin Mikrajudin Abdullah Mitra Djamal Mitra Djamal Mohamad Barmawi Muhammad Fauzan Muhammad Fauzul Imron Muhammad Miftahul Munir Novriadi, Novriadi Nur A. Aprianti Rahmayanti, Handika Dany Rahmondia N. S Rajak, Abdul Ramli Ramli Ramli Ramli Rezeki, Ningsih Ricky Dwi Septianto Risa Suryana Riska Ekawita Riska Ekawita S Saehana Sekar Mentari Septia Mahen, Ea Cahya Septianto, Ricky Dwi Silvia Surini Sukirno . Sukirno Sukirno Sukirno Sukirno Sukirno Sukirno Sukirno Sukirno Sukirno Sukirno Sukirno Sukirno Suprijadi Suprijadi Suprijadi Suprijadi Sutisna Sutisna Syahputra, Tri Siswandi T. Suciati Tarmizi Taher Taufik Adi Nugraha Togar Saragi Toto Winata Toto Winata Toto Winata Widhya Budiawan Widhya Budiawan Yudha Gusti Wibowo Yudi Darma Yulkifli Yulkifli Zaki Suud

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