Optical Absorption Red Shift of Capped ZnFe2O4 Nanoparticle
YUAN Zhi-hao1, YOU Wei2, JIA Jun-hui1, ZHANG Li-de1
1Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031
2Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026
Optical Absorption Red Shift of Capped ZnFe2O4 Nanoparticle
YUAN Zhi-hao1;YOU Wei2;JIA Jun-hui1;ZHANG Li-de1
1Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031
2Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026
Abstract： Nanometer-sized ZnFe2O4 particles capped with a layer of surfactant are synthesized and their optical absorption is investigated. Such capped ZnFe2O4 particles present a strong band edge absorption in visible region and their energy band gap is estimated to be about 1.53eV. It is also found that the capped nanoparticles have a significant red shift of optical absorption band edge in contrast with that of uncapped ZnFe2O4 nanoparticles, which is mainly related to the trapped and self-trapped excitons absorption resulting from an interfacial dipole layer formed on the surface of ZnFe2O4 nanoparticles.
1998, Vol. 15 
