Article Per Year (5 Year)
p-Index From 2020 - 2025
0
P-Index
This Author published in this journals
All Journal Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Al-Kimia Jurnal Ilmu Fisika
Akrajas Ali Umar
Unknown Affiliation
Astronomy Chemistry Earth & Planetary Sciences Materials Science & Nanotechnology Mathematics Physics

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
Pengaruh Surfaktan Biner Cetil Trimetil Amonium Bromida (CTAB)- Hexametilen Triamin (HMT) pada Pembentukan Perak Nanorods menggunakan Katalis Natrium Hidroksida Atiek Rostika Noviyanti; Iwan Hastiawan; Akrajas Ali Umar; Diana Rakhmawaty Eddy; Gani Abdilah
Al-Kimia Vol 5 No 1 (2017): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v5i1.2843

Abstract

Nanoparticles have different physical properties and more interesting than that of bulk material. Nanoparticles are highly preferred for applications in various technologies as a catalyst, the raw material of electronic components, and as an antimicrobial agent. The aim of the research is synthesize of silver nanorods.  The effect of a binary surfactant CTAB-HMT on the morphology and homogeneity were investigated using UV/Vis spectrophotometer, TEM, and XRD. Base on the UV/Vis spectra and TEM morphology, silver nanoparticles have two types, spherical and rods shapes.  The best product of nanorods was obtained  at the composition of CTAB 0.15 M : HMT 0.15 M. The structure of nanorods obtained were face center cubic (fcc).
PENUMBUHAN DAN KARAKTERISASI NANOPARTIKEL PERAK PADA SUBSTRAT PADAT Rizky Ardie Yani; Iwantono '; Akrajas Ali Umar
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Silver nanoparticles have been successfully grown on solid substrate. The growth of the particles used wet chemical  method which consisted of two steps, seeding and growing steps. The silver nanoparticle growth was carried out by two variations which were surfactant’s concentration and ascorbic acid’s volume.  The UV-Vis spectrum profile of the samples described that the  growth of silver nanoparticles of spherical shape was dominated on the ITO, represented as a sharp single peak of the absorption spectra. Its characterization measured by XRD showed that silver nanoparticles had grown on the substrate with crystal orientation (1 1 1) and (2 0 0). The FESEM images depicted that the shape of silver nanoparticles was a spherical shape with their uniform diameter size of 300-650 nm.
Sintesis Nanopartikel Titanium Dioksida Didoping Rhutenium Abdil Bajili; Dahyunir Dahlan; Akrajas Ali Umar
Jurnal Ilmu Fisika (JIF) Vol 8 No 2 (2016): September 2016
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.8.2.54-59.2016

Abstract

Nanopartikel titanium dioksoda (TiO2) yang didoping ruthenium (Ru/TiO2) ditumbuhi dengan menggunakan metode penumbuhan Liquid Phase Deposition (LPD) telah berhasil dilakukan. Konsentrasi doping ruthenium yang digunakan adalah 2,5 mM. Variasi lama waktu penumbuhan dilakukan selama 3 jam, 5 jam, 7 jam dan 10 jam. Kemudian dilakukan karakterisasi Ultraviolet-visible, fotoelektron sinar-x dan teknik difraksi sinar-x. Energi gap yang didapatkan dengan waktu penumbuhan 3 jam dan 5 jam adalah 3,22 eV dan 3,28 eV. Sedangkan waktu penumbuhan 7 jam dan 10 jam adalah 3,16 eV dan 3,29 eV. Morfologi dari Ru/TiO2 bersifat nanopori dengan fasa adalah anatase. Kata kunci: Liquid Phase Deposition (LPD), nanopartikel Ru/TiO2, doping ruthenium, fase anatase. 
Pengaruh Lama Penumbuhan Titanium Dioksida Didoping Copper Terhadap Energi Gap Ade Usra Berli; Dahyunir Dahlan; Akrajas Ali Umar
Jurnal Ilmu Fisika (JIF) Vol 8 No 2 (2016): September 2016
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.8.2.60-63.2016

Abstract

Deposisi lapisan TiO2 didoping Cu telah berhasil ditumbuhkan dengan menggunakan metoda Liquid Phase Deposition (LPD). Lapisan TiO2-Cu dibuat dengan menggunakan material Ammonium hexafluorotitanate ((NH4)2TiF6), Copper (II) Nitrate hydrate (Cu(NO3)2·xH2O), dan Hexamethylen tetramine (C6H12N4). Dalam penelitian ini dilakukan variasi lama penumbuhan lapisan yaitu 3 jam, 5 jam, 7 jam dan 10 jam. Lapisan TiO2-Cu dikarakterisasi menggunakan Spektrometri Ultraviolet-Visible (UV-Vis) untuk menentukan energi gap melalui spektra difusi reflektansi. Hasil energi gap yang diperoleh pada lapisan TiO2-Cu dengan variasi lama penumbuhan yaitu antara 3,26-3,30 eV.Kata kunci: Titanium dioksida (TiO2), Liquid Phase Deposition (LPD) dan doping 
Co-Authors Abdil Bajili Ade Usra Berli Atiek Rostika Noviyanti Dahyunir Dahlan Diana Rakhmawaty Eddy Gani Abdilah Iwan Hastiawan Iwantono Iwan Barnawi Rizky Ardie Yani