Analysis of Dislocations in Quasicrystals Composed of Self-assembled Nanoparticles

Liron Korkidi, Kobi Barkan, Ron Lifshitz

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We analyze transmission electron microscopy (TEM) images of self-assembled quasicrystals composed of binary systems of nanoparticles. We use an automated procedure that identifies the positions of dislocations and determines their topological character. To achieve this, we decompose the quasicrystal into its individual density modes, or Fourier components, and identify their topological winding numbers for every dislocation. This procedure associates a Burgers function with each dislocation, from which we extract the components of the Burgers vector after choosing a basis. The Burgers vectors that we see in the experimental images are all of lowest order, containing only 0s and 1s as their components. We argue that the density of the different types of Burgers vectors depends on their energetic cost.
Original languageEnglish
Title of host publicationAperiodic crystals
EditorsSiegbert Schmid, Ray L. Withers, Ron Lifshitz
Place of PublicationDordrecht
PublisherSpringer
Chapter16
Pages117-124
Number of pages8
ISBN (Electronic)9789400764316
ISBN (Print)9400764308, 9789400764309, 978-94-024-0065-6, 9400764316
DOIs
StatePublished - 2013

Keywords

  • Bragg
  • Density
  • Topological analysis

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