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Synthesis and Characterization of Novel Au(core)-Au/Pt Alloy(shell) Nanostructure

Published online by Cambridge University Press:  21 March 2011

Ru-Shi Liu ,
Hau-Ming Chen  and
Shu-Fen Hu
Ru-Shi Liu
Affiliation:
Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
Hau-Ming Chen
Affiliation:
Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
Shu-Fen Hu
Affiliation:
National Nano Device Laboratories, Hsinchu 300, Taiwan
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Abstract

A systematic study is reported about the amount-dependent morphology change in a series of Au-Pt bimetallic nanoparticles synthesized using chemical reduction. The amount of Au precursor is kept constant throughout whole series of compounds to obtain fixed Au core size (∼7.5 nm). The Au/Pt ratio is varied from 1/1 to 1/4 in order to synthesize Pt shell layer of different thickness. We observed a remarkable shift of surface plasmon band around 410 nm. With the aid of high resolution transmission electron microscope (HRTEM) and energy-dispersive spectrometer (EDS), the composition of shell layer is found to be Pt enriched Au-Pt alloy. As the amount of Pt increases, the Pt clusters formed a string-like shape on the surface of nanoparticles. The average diameter of these Pt clusters is about 2 nm. This special structure may exhibit unique catalytic property.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 818: Symposium M – Nanoparticles and Nanowire Building Blocks-Synthesis, Processing, Characterization and Theory , 2004 , M5.45.1
Copyright
Copyright © Materials Research Society 2004

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References

(1) Toshima, N., Harada, M., Yamazaki, Y. and Asakura, K., J. Phys. Chem. 96, 9927 (1992).Google Scholar
(2) Harada, M., Asakura, K. and Toshima, N., J. Phys. Chem. 97, 5103 (1993).Google Scholar
(3) Toshima, N. and Yonezawa, T., New J. Chem. 1179 (1998).Google Scholar
(4) Beecroft, L. L. and Ober, C. K., Chem. Mater. 9, 1302 (1997).Google Scholar
(5) Sang, W. H., Yunsoo, K. and Kwan, K., J. Colloid. Interface Sci. 208, 272 (1998).Google Scholar
(6) Link, S., Wang, Z. L. and EI-Sayed, M. A., J. Phys. Chem. B 103, 3529 (1999).Google Scholar
(7) Mallin, M. P. and Murphy, C. J., Nano Lett. 2, 1235 (2002).Google Scholar
(8) Mallik, K., Mandal, M., Pradhan, N. and Pal, T., Nano Lett. 1, 319 (2001).Google Scholar
(9) Wu, M.-L., Chen, D.-H and Huang, T.-C., Chem. Mater. 13, 599 (2001).Google Scholar
(10) Remita, S., Picq, G., Khatouri, J. and Mostafavi, M., Radiat. Phys. Chem. 54, 463 (1999).Google Scholar
(11) Mie, G., Ann. Physik, 25, 377 (1908).Google Scholar
(12) Srnova-Sloufova, I., Lrantisek, F., Gemperle, A. and Gemperlova, J., Langmuir 16, 9928 (2000).Google Scholar