On the interpretation of the forbidden spots observed in the electron diffraction patterns of flat Au triangular nanoparticles

J. Reyes-Gasga, A. Gómez-Rodríguez, Xiaoxia Gao, M. José-Yacamán

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

In many cases nanostructures present forbidden spots in their electron diffraction patterns when they are observed by transmission electron microscopy (TEM). To interpretate their TEM and high resolution transmission electron microscopy (HRTEM) images properly, an understanding of the origin of these spots is necessary. In this work we comment on the origin of the forbidden spots observed in the [1 1 1] and [1 1 2] electron diffraction patterns of flat gold triangular nanoparticles. The forbidden spots were successfully indexed as corresponding to the first laue Zone (FOLZ) and the HRTEM images presented a contrast produced by the interference of the zero-order Laue zone (ZOLZ) and FOLZ spots. We discuss the use of the forbidden spots in the study of the structure of nanoparticles and show that they are related to the shape and incompleteness of layers in the very thin particles.

Original languageEnglish (US)
Pages (from-to)929-936
Number of pages8
JournalUltramicroscopy
Volume108
Issue number9
DOIs
StatePublished - Aug 2008
Externally publishedYes

Keywords

  • Electron diffraction
  • Gold nanoparticles
  • High resolution electron microscopy
  • Nanostructures

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Instrumentation

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