What is it about?
We demonstrated how to make a copper foam with a very low density (2.5% dense) with ligament dimensions in the 100's of nm dimensions. Starting with an electrospun polymer containing metal acetates, we convert the polymer mesh to a copper oxide foam, and then reduce the ceramic foam to a metal. The resulting structure has a hierarchical structure, with rough and porous ligaments forming a larger foam, and the foam ligaments are polycrystalline. The foam is extremely compliant and flexible.
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Why is it important?
The polymer templated foam fabrication method allows us to control a large space of density, and the "foam of foam" structure means we have a very larger surface area in the foam. This could be useful for filtering and catalysis.
Perspectives
Not often do we work on a paper that has polymers, metals, AND ceramics (which of course we then proceed to measure using nanoindentation).
David F Bahr
Purdue University System
Read the Original
This page is a summary of: Synthesis, microstructure, and mechanical properties of polycrystalline Cu nano-foam, MRS Advances, January 2018, Cambridge University Press,
DOI: 10.1557/adv.2018.128.
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