Direct imaging of quantum antidots in MgO dispersed with Au nanoclusters

C. M. Wang, V. Shutthanandan, S. Thevuthasan, G. Duscher

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Abstract

Formation of quantum antidots at the immediate neighborhood of Au nanocluster has been proposed in order to explain the observed nonlinear optical behavior of magnesium oxide (MgO) when Au nanoclusters were dispersed in it. In this letter, using high-angle annular dark-field imaging in an aberration-corrected scanning transmission electron microscope, we report the direct observation of clustering of vacancies in excess of Au atoms to form quantum antidots at the immediate neighborhood of the Au clusters, leading to a spatially associated Au nanoclusters and the quantum antidots. The antidots show a terraced layer structure and are typically faceted along the MgO{100} planes.

Original languageEnglish
Article number153104
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume87
Issue number15
DOIs
Publication statusPublished - 10 Oct 2005
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Wang, C. M., Shutthanandan, V., Thevuthasan, S., & Duscher, G. (2005). Direct imaging of quantum antidots in MgO dispersed with Au nanoclusters. Applied Physics Letters, 87(15), 1-3. [153104]. https://doi.org/10.1063/1.2099518