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Fabrication of In2O3 Oxide Semiconductor Nano-Particles Using Apoferritin

Published online by Cambridge University Press:  01 February 2011

Mitsuhiro Okuda
Affiliation:
Advanced Technology Research Laboratories, Matsushita Electric Industrial Co., Ltd., Hikaridai, Seika, Kyoto 619-0237
Ichiro Yamashita
Affiliation:
Advanced Technology Research Laboratories, Matsushita Electric Industrial Co., Ltd., Hikaridai, Seika, Kyoto 619-0237
Kenji Iwahori
Affiliation:
CREST, Japan Science and Technology Agency, Honcho 4-1-8, Kawaguchi 332-0012
Hideyuki Yoshimura
Affiliation:
Meiji University, Higashimita 1-1-1, Tama Kawasaki Kanagawa 214-8571
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Abstract

In2O3 nanoparticles were fabricated in the cavity of the cage-shaped protein, apoferritin by utilizing a quick chemical reaction of indium oxide. Horse spleen apoferritin in the solution of indium ions buffered at pH 9.5 was incubated for 30 minutes. The transmission electron microscopy (TEM) observation with aurothioglucose staining showed that cores were formed in the apoferritin cavity. The sizes of cores were regulated by the cavity size and their diameters were below 7nm. Energy dispersion X-ray analysis (EDX) indicated that indium was contained in the cores. The high-resolution TEM (HR-TEM) revealed that cores are single or poly crystalline and the lattice space was consistent with that of In2O3. These results confirmed that the In2O3 cores were successfully formed in the apoferritin cavity.

Type
Research Article
Copyright
Copyright © Materials Research Society 2005

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References

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Fabrication of In2O3 Oxide Semiconductor Nano-Particles Using Apoferritin
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