A new mechanism of stabilization of large decahedral nanoparticles

Gilberto Casillas, J. Jesús Velázquez-Salazar, Miguel Jose-Yacaman

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

The stability of decahedral shaped nanoparticles depends upon size. Ino and Marks introduced new mechanisms for the stabilization of decahedra nanoparticles that involves the faceting and formation of surfaces different from {111}. These mechanisms have relevance for small size nanoparticles; however, they do not thoroughly explain how decahedral particles can grow up to 300 nm or more. Here, we report new mechanisms that help stabilize very large decahedra. With the use of aberration-corrected scanning transmission electron microscopy, we observed the formation of high index facets, determined to be of the {511} family, on all five sides of the particles. Surface dislocations strings are also observed. In addition, surface reconstruction of the {001} surfaces can also be observed in two different orientations: with hexagonal strings along the [110] and [410] directions.

Original languageEnglish (US)
Pages (from-to)8844-8848
Number of pages5
JournalJournal of Physical Chemistry C
Volume116
Issue number15
DOIs
StatePublished - Apr 19 2012
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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