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Microdiffraction Studies of Small Gold Metallic Particles

Published online by Cambridge University Press:  21 February 2011

Miguel Jose-Yacaman ,
Alfredo Gomez  and
Krystyna Truszkowska
Miguel Jose-Yacaman
Affiliation:
Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20–364, Delegación Alvaro Obregón, México 01000, D. F.
Alfredo Gomez
Affiliation:
Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20–364, Delegación Alvaro Obregón, México 01000, D. F.
Krystyna Truszkowska
Affiliation:
Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20–364, Delegación Alvaro Obregón, México 01000, D. F.
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Abstract

The crystalline structure of small gold particles in the size range between 50–200 Å is studied using STEM in microdiffraction.

It is found that some single-crystalline particles showed an anomalous diffraction pattern. In some cases these pattern be indexed as an hexagonal lattice with a ratio c/a= 2.46. A number of models to explain the hexagonal diffraction are discussed. In some other cases the patterns correspond to fcc structures but with a large splitting effect. The results reveal the strong dynamical character of the diffraction by small gold particles.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 31: Symposium N – Electron Microscopy of Materials , 1983 , 233
Copyright
Copyright © Materials Research Society 2006

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References

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