lin-controllefporosity-2017.pdf (1.31 MB)
Controlled porosity and pore size of nano-porous gold by thermally assisted chemical dealloying - a SAXS study
journal contribution
posted on 2017-01-01, 00:00 authored by Bao Lin, Lingxue KongLingxue Kong, Peter HodgsonPeter Hodgson, S Mudie, A Hawley, Ludovic DumeeNano-porous metals offer great potential for applications such as bio-sensors, chemical reactors, platforms for cell growth, and media for separation because of their high surface area and reactivity at the nanoscale. The high surface to volume ratio of nano-porous metals also offers advanced plasmonic properties which may be put to use upon refining the control over pore size distributions in the nanoscale range. Here, the impact of the solution temperature on the nature of both ligaments and pores generated across ultra-thin AuAg50 metal leaves by chemical dealloying is demonstrated for the first time. The pores were found to be controllably tuneable within a range from 30 to 54 nm in diameter after 75 min of treatment in an etching solution with a temperature between 5 and 60 °C. The kinetics of the pore formation was studied by an in situ dealloying experiment on the small angle X-ray scattering beamline at the Australian Synchrotron and specific materials properties were thereafter cross-correlated to ex situ morphological experiments. This work demonstrates a straightforward new method to refine porous structures at the nanoscale and fine-tune surface properties across nano-porous metals that will extend their applications.
History
Journal
RSC AdvancesVolume
7Issue
18Pagination
10821 - 10830Publisher DOI
eISSN
2046-2069Publication classification
C1 Refereed article in a scholarly journalCopyright notice
2017, The AuthorsUsage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC