Ambient-stable tetragonal phase in silver nanostructures

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

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Author(s)

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

Detail(s)

Original languageEnglish
Article number971
Journal / PublicationNature Communications
Volume3
Publication statusPublished - 2012
Externally publishedYes

Link(s)

Abstract

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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Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

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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