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Substrate Dependence in the Growth of Three-Dimensional Gold Nanoparticle Superlattices

Published online by Cambridge University Press:  15 March 2011

S. Sato ,
N. Yamamoto ,
H. Yao  and
K. Kimura
S. Sato
Affiliation:
Department of Material Science, Himeji Institute of Technology, 3-2-1 Koto, Kamigori-cho, Ako-gun, Hyogo 678-1297, JAPAN
N. Yamamoto
Affiliation:
Department of Material Science, Himeji Institute of Technology, 3-2-1 Koto, Kamigori-cho, Ako-gun, Hyogo 678-1297, JAPAN
H. Yao
Affiliation:
Department of Material Science, Himeji Institute of Technology, 3-2-1 Koto, Kamigori-cho, Ako-gun, Hyogo 678-1297, JAPAN
K. Kimura
Affiliation:
Department of Material Science, Himeji Institute of Technology, 3-2-1 Koto, Kamigori-cho, Ako-gun, Hyogo 678-1297, JAPAN
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Abstract

Three-dimensional superlattices consisting of gold nanoparticles were grown at air/suspension or suspension/solid interfaces. The growth of superlattices was found to be strongly dependent on substrate materials: Micrometer-sized superlattices were grown at air/suspension interfaces and upon silver substrates, whereas no growth was observed on silicon, silicon oxide, or amorphous carbon substrates. To explain the observed substrate dependence, Lifshitz theory was used to calculate the Hamaker constants between gold nanoparticle assemblies and substrates through the suspension. Van der Waals interactions estimated from this calculation fully explain the experimental results.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 703: Symposia U/V – Nanophase and Nanocomposite Materials IV , 2001 , V9.20
Copyright
Copyright © Materials Research Society 2002

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References

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