Controlling of optical energy gap of Co-ferrite quantum dots in poly (methyl methacrylate) matrix

被引：8
|
作者：
El-Sayed, H. M. [1 ]
Agami, W. R. [1 ]
机构：
[1] Ain Shams Univ, Fac Sci, Dept Phys, Cairo 11566, Egypt
来源：
SUPERLATTICES AND MICROSTRUCTURES | 2015年 / 83卷
关键词：
Nanocomposites; PMMA polymer; Co-ferrite; Energy gap; MAGNETIC-PROPERTIES; SIZE DEPENDENCE; COPRECIPITATION;
D O I：
10.1016/j.spmi.2015.04.013
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Different crystallite sizes of Co-ferrite nanoparticles were prepared and dispersed in the matrix of poly (methyl methacrylate) (PMMA) polymer. The effect of crystallite size on the structure and optical energy gap of Co-nanoferrite/PMMA composite has been studied. The optical energy gap of Co-ferrite was greatly affected by the crystallite size. This result was discussed in terms of the formation of electron hole exciton using particle in a box model. The effective mass and the Bohr radius of the formed exciton have been calculated from the spectroscopic measurements. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：651 / 658
页数：8
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