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Thermal coarsening of nanoporous gold: Melting or recrystallization

Published online by Cambridge University Press:  31 January 2011

Masataka Hakamada  and
Mamoru Mabuchi
Masataka Hakamada*
Affiliation:
Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology (AIST), Shimoshidami, Moriyama, Nagoya 463-8560, Japan
Mamoru Mabuchi
Affiliation:
Department of Energy Science and Technology, Graduate School of Energy Science, Kyoto University, Yoshidahonmachi, Sakyo, Kyoto 606-8501, Japan
*
a) Address all correspondence to this author. e-mail: masataka-hakamada@aist.go.jp
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Abstract

The thermal coarsening of nanoporous Au was examined and compared with the thermal instability of Au nanoparticles. The nanoporous Au was coarsened at temperatures far below the melting temperature of Au nanoparticles, which possess sizes similar to the nanoligaments. Differential scanning calorimetry characterization of nanoporous Au exhibited an exothermal peak around 470 K. These results suggest that solid-state process like recrystallization, rather than melting, is responsible for the thermal coarsening of nanoporous Au.

Keywords

AuNanostructurePorosity
Type
Rapid Communications
Information
Journal of Materials Research , Volume 24 , Issue 2 , February 2009 , pp. 301 - 304
Copyright
Copyright © Materials Research Society 2009

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