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Transmission electron microscopy observation of oxide layer growth on Cu nanoparticles and formation process of hollow oxide particles

Published online by Cambridge University Press:  31 January 2011

D. Tokozakura ,
R. Nakamura ,
H. Nakajima ,
J.-G. Lee  and
H. Mori
D. Tokozakura
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
R. Nakamura*
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
H. Nakajima
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
J.-G. Lee
Affiliation:
Korea Institute of Machinery and Materials, Changwon-City 641-831, Korea
H. Mori
Affiliation:
Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, Ibaraki, Osaka 567-0047, Japan
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The growth of a Cu2O layer on Cu nanoparticles at 323–373 K was investigated by transmission electron microscopy to elucidate the influence of voids formed at the Cu/Cu2O interface on the oxidation rate. The thickness of the Cu2O formed on Cu nanoparticles with an initial diameter of 10 to ∼35 nm was measured as a function of oxidation time. During the initial oxidation stage until the oxide film is about 2.5 nm thick, the oxide film on nanoparticles of 10 to ∼35 nm in diameter grows rapidly at an almost consistent rate. After that, however, the growth rate of smaller nanoparticles decreases drastically compared with that of larger ones, suggesting that the voids formed near the Cu/Cu2O interface prevent Cu atoms from diffusing outward, because the volume ratio of voids to inner Cu in the case of smaller nanoparticles is considerably higher than that for larger ones at the same oxidation time.

Keywords

OxidationNanoscaleTransmission electron microscopy (TEM)
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 10 , October 2007 , pp. 2930 - 2935
Copyright
Copyright © Materials Research Society 2007

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References

REFERENCES

1Xia, Y.Halas, N.J.: Shape-controlled synthesis and surface plasmonic properties of metallic nanostructures. MRS Bull. 30, 356 2005CrossRefGoogle Scholar
2Kim, S.W., Kim, M., Lee, W.Y.Hyeon, T.: Fabrication of hollow palladium spheres and their successful application to the recyclable heterogeneous catalyst for Suzuki coupling reactions. J. Am. Chem. Soc. 124, 7642 2002CrossRefGoogle Scholar
3Sun, Y.Xia, Y.: Mechanistic study on the replacement reaction between silver nanostructures and chloroauric acid in aqueous medium. J. Am. Chem. Soc. 126, 3892 2004CrossRefGoogle Scholar
4Lee, J., Sohn, K.Hyeon, T.: Fabrication of novel mesocellular carbon foams with uniform ultralarge mesopores. J. Am. Chem. Soc. 123, 5146 2001CrossRefGoogle ScholarPubMed
5Mandal, T.K., Fleming, M.S.Walt, D.R.: Production of hollow polymeric microspheres by surface-confined living radical polymerization on silica templates. Chem. Mater. 12, 3481 2000CrossRefGoogle Scholar
6Graf, C.Blaaderen, A.: Metallodielectric colloidal core-shell particles for photonic applications. Langmuir 18, 524 2002CrossRefGoogle Scholar
7Casuo, F., Casuo, R.A.Möhwald, H.: Nanoengineering of inorganic and hybrid hollow spheres by colloidal templating. Science 282, 1111 1998Google Scholar
8Yin, Y., Robert, R.M., Erdonmez, C.K., Hughes, S., Somorjai, G.A.Alivisatos, A.P.: Formation of hollow nanocrystals through the nanoscale Kirkendall effect. Science 304, 711 2004CrossRefGoogle ScholarPubMed
9Yin, Y., Erdonmez, C.K., Cabot, A., Hughes, S.Alivisatos, A.P.: Colloidal synthesis of hollow cobalt sulfide nanocrystals. Adv. Funct. Mater. 16, 1389 2006CrossRefGoogle Scholar
10Wang, C.M., Baer, D.R., Thomas, L.E., Amonette, J.E., Antony, J., Qiang, Y.Duscher, G.: Void formation during early stages of passivation: Initial oxidation of iron nanoparticles at room temperature. J. Appl. Phys. 98, 093408 2005CrossRefGoogle Scholar
11Nakamura, R., Lee, J-G., Tokozakura, D., Mori, H.Nakajima, H.: Formation of hollow ZnO through low-temperature oxidation of Zn nanoparticles. Mater. Lett. 61, 1060 2007CrossRefGoogle Scholar
12Nakamura, R., Lee, J-G., Tokozakura, D., Mori, H.Nakajima, H.: Hollow oxide formation by oxidation of Al and Cu nanoparticles. J. Appl. Phys. 101, 074303 2007CrossRefGoogle Scholar
13Young, F.W., Cathcart, J.V.Gwathmey, A.T.: The rates of oxidation of several faces of a single crystal of copper as determined with elliptically polarized light. Acta Metall. 4, 145 1956CrossRefGoogle Scholar