Ambient-stable tetragonal phase in silver nanostructures

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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  • Yugang Sun
  • Yuzi Liu
  • Jianguo Wen
  • John S. Okasinski
  • Dean J. Miller


Original languageEnglish
Article number971
Journal / PublicationNature Communications
Publication statusPublished - 2012
Externally publishedYes



Crystallization of noble metal atoms usually leads to the highly symmetric face-centred cubic phase that represents the thermodynamically stable structure. Introducing defective microstructures into a metal crystal lattice may induce distortions to form non-face-centered cubic phases when the lateral dimensions of objects decrease down to nanometre scale. However, stable non-face-centered cubic phases have not been reported in noble metal nanoparticles. Here we report that a stable body-centred tetragonal phase is observed in silver nanoparticles with fivefold twinning even at ambient conditions. The body-centered tetragonal phase originates from the distortion of cubic silver lattices due to internal strains in the twinned nanoparticles. The lattice distortion in the centre of such a nanoparticle is larger than that in the surfaces, indicating that the nanoparticle is composed of a highly strained core encapsulated in a less-strained sheath that helps stabilize the strained core. © 2012 Macmillan Publishers Limited. All rights reserved.

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Ambient-stable tetragonal phase in silver nanostructures. / Sun, Yugang; Ren, Yang; Liu, Yuzi et al.
In: Nature Communications, Vol. 3, 971, 2012.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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