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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
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| Cite this article: |
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YUAN Zhi-hao, YOU Wei, JIA Jun-hui et al 1998 Chin. Phys. Lett. 15 535-536 |
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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.
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| Keywords:
78.20.Ci
78.66.Jg
81.05.Ys
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Published: 01 July 1998
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| PACS: |
78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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78.66.Jg
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(Amorphous semiconductors; glasses)
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81.05.Ys
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