Optical and magnetic properties of elliptical hematite (α-Fe2O3) nanoparticles coated with uniform continuous layers of silica of different thickness
- 作者：Jen-Bin Shi ; Chia-Wei Lee ; Jhe-Wei Guo ; Min-Jung Cheng ; Chien Wu ; Chih-Jung Chen ; Yu-Cheng Chen ; Ya-Ting Lin ; Chung-Chieh Chang
- 关键词：Elliptical α ; -Fe2O3 nanoparticles ; Optical properties ; Magnetic materials ; Nanomaterials
- 刊名：Materials Letters
- 出版年：2007
- 期刊代码：59_0167577x
- 类别：ms
- 出版时间：December 2007
- 卷：61
- 期：30
- 页码：5268-5270
- 文件大小：422 K
摘要
Elliptical-type α-Fe2O3 nanoparticles with/without silica shell have been prepared. The core particles were coated with uniform continuous layers of silica of two different thicknesses by hydrolysis of TEOS. The obtained HCP structure elliptical α-Fe2O3 nanoparticles with 
240 nm length and 100 nm width is polycrystalline in nature. The thicknesses of SiO2 shell coated on α-Fe2O3 are about 55 and 30 nm, respectively. The optical and magnetic properties of these nanoparticles have been investigated.
240 nm length and 100 nm width is polycrystalline in nature. The thicknesses of SiO2 shell coated on α-Fe2O3 are about 55 and 30 nm, respectively. The optical and magnetic properties of these nanoparticles have been investigated.