Strong, Ductile, and Tough Nanocrystal-Assembled Freestanding Gold Nanosheets.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 35029994.
- Also identified by DOI 10.1021/acs.nanolett.1c04553.
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Abstract
The structural and mechanical properties of low-dimensional nanostructured metals have been attracting tremendous interest in the fast-growing fields of nanosciences and nanotechnologies. However, it still remains a challenge today to develop strong yet ductile low-dimensional metals that can support the further development of nanodevices. Here, through the polymer-assisted assembly of gold nanocrystals, we successfully fabricated the freestanding, ultrathin gold nanomaterial. Unlike conventional bulk gold or other low-dimensional gold nanostructures (i.e., nanowires and nanosheets), these gold nanosheets are composed of highly distorted gold nanocrystals that are 3-5 nm in size, which are joined together through nanosized amorphous carbon interphases. As a result, the gold nanosheets exhibit superb strength (up to 1.2 GPa), excellent ductility (>50%), and superior fracture toughness (>100 J/m<sup>2</sup>), outperforming various gold nanostructures hitherto reported.
Medical subject headings
- Nanoparticles
- Nanostructures