Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.



Evolution of dealloying induced strain in nanoporous gold crystals

Author affiliations

Abstract

We studied the evolution of dealloying-induced strain along the {111} in a Ag–Au nano-crystal in situ, during formation of nanoporous gold at the initial stage of dealloying using Bragg coherent X-ray diffractive imaging. The strain magnitude with maximum probability in the crystal doubled in 10 s of dealloying. Although formation of nano-pores just began at the surface, the greatest strain is located 60–80 nm deep within the crystal. Dealloying induced a compressive strain in this region, indicating volume shrinkage occurred during pore formation. The crystal interior showed a small tensile strain, which can be explained by tensile stresses induced by the non-dealloyed region upon the dealloyed region during volume reduction. A surface strain relaxation developed, attributed to atomic rearrangement during dealloying. This clearer understanding of the role of strain in the initial stages of formation of nanoporous gold by dealloying can be exploited for development of new sensors, battery electrodes, and materials for catalysis.

Graphical abstract: Evolution of dealloying induced strain in nanoporous gold crystals

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 14 Dec 2016, accepted on 08 Apr 2017 and first published on 10 Apr 2017


Article type: Paper
DOI: 10.1039/C6NR09635B
Citation: Nanoscale, 2017, Advance Article
  •   Request permissions

    Evolution of dealloying induced strain in nanoporous gold crystals

    Y. K. Chen-Wiegart, R. Harder, D. C. Dunand and I. McNulty, Nanoscale, 2017, Advance Article , DOI: 10.1039/C6NR09635B

Search articles by author