Optical Properties of Fe3O4 Thin Films Prepared from the Iron Sand by Spin Coating Method

2nd International Conference on Mathematics, Science, Education and Technology

数学;自然科学;教育

Yulfriska, N.^1 ; Rianto, D.^1 ; Murti, F.^1 ; Darvina, Y.^1 ; Ramli, R.^1

Physics Department, Faculty of Mathematics and Sciences, Universitas Negeri Padang, Indonesia^1

关键词: Characterization tools;    Experimental research;    Nanoparticle sizes;    Sol-gel spin coating method;    Speed of rotation;    Spin-coating method;    Transmittance and reflectances;    UV-Vis spectrophotometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/335/1/012010/pdf
DOI  :  10.1088/1757-899X/335/1/012010

来源: IOP

【 摘 要 】

Research on magnetic oxide is growing very rapidly. This magnetic oxide can be found in nature that is in iron sand. One of the beaches in Sumatera Barat containing iron sand is Tiram Beach, Padang Pariaman District, Sumatera Barat. The content of iron sand is generally in the form of magnetic minerals such as magnetite, hematite, and maghemit. Magnetite has superior properties that can be developed into thin films. The purpose of this research is to investigate the optical properties of transmittance, absorbance, reflectance and energy gap from Fe3O4thin films. This type of research is an experimental research. The iron sand obtained from nature is first purified using a permanent magnet, then made in nanoparticle size using HEM-E3D with milling time for 30 hours. After that, the process of making thin film with sol-gel spin coating method. In this research, variation of rotation speed from spin coating is 1000 rpm, 2000 rpm and 3000 rpm. Based on XRD results indicated that the iron sand of Tiram beach contains magnetite minerals and the SEM results show that the thickness of the thin films formed is 25μm, 24μm and 11μm. The characterization tool used for characterizing optical properties is the UV-VIS Spectrophotometer. So it can be concluded that the greater the speed of rotation the thickness of the thin layer will be smaller, resulting in the transmittance and reflectance will be greater, while the absorbance will be smaller. Energy gap obtained from this research is 3,75eV, 3,75eV and 3,74eV. So the average energy gap obtained is 3,75eV.