Microstructure, stability and thermomechanical behavior of crack-free thin films of nanoporous gold

Ye Sun, Kalan P. Kucera, Sofie A. Burger, T. John Balk

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

Nanoporous gold thin films were prepared by dealloying and were completely crack-free, with a continuous ligament network across grain boundaries. Film stress increases during dealloying, and thermal cycling causes thermoelastic deformation. Ligament width coarsens during cycling to 200 °C, but at higher temperatures the porous structure densifies. The stability of nanoporous films may also depend on film thickness. From the biaxial film stress, the equivalent yield strength of nanoporous gold was calculated to be at least 1.8 GPa.

Original languageEnglish
Pages (from-to)1018-1021
Number of pages4
JournalScripta Materialia
Volume58
Issue number11
DOIs
StatePublished - Jun 2008

Bibliographical note

Funding Information:
Acknowledgment is made to the Donors of the American Chemical Society Petroleum Research Fund, for support of this research.

Keywords

  • Dealloying
  • Gold
  • Nanoporous
  • Thin film

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

Fingerprint

Dive into the research topics of 'Microstructure, stability and thermomechanical behavior of crack-free thin films of nanoporous gold'. Together they form a unique fingerprint.

Cite this