Decahedra and Icosahedra Everywhere: The Anomalous Crystallization of Au and Other Metals at the Nanoscale

Blake Rogers, Alexander Lehr, J. Jesús Velázquez-Salazar, Robert Whetten, Ruben Mendoza-Cruz, Lourdes Bazan-Diaz, Daniel Bahena-Uribe, Miguel José Yacaman

Research output: Contribution to journalReview articlepeer-review

2 Scopus citations

Abstract

Throughout history, objects with fivefold symmetry have been a popular topic of interest for artists, philosophers, and scientists. This may be because fivefold symmetry is very conspicuous in nature. In the case of crystals, fivefold rotational symmetry is mathematically forbidden, and macroscopic crystals exhibiting fivefold symmetry have never been shown to exist. Nevertheless, in the nanoworld, nanoparticles are often found with decahedral and icosahedral shapes that have an overall pseudo-fivefold symmetry. These structures are observed at many length scales, from 1 nm up to 1 µm. In this review, several reasons for the stability of fivefold nanoparticles are discussed. These include the formation of twin boundaries, surface reconstruction faceting, and other factors.

Original languageEnglish (US)
Article number2200259
JournalCrystal Research and Technology
Volume58
Issue number4
DOIs
StatePublished - Apr 2023

Keywords

  • decahedral and icosahedral nanoparticles
  • electron microscopy
  • nanoalloys
  • nanotechnology

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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