Journal
ULTRAMICROSCOPY
Volume 108, Issue 9, Pages 929-936Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultramic.2008.03.005
Keywords
gold nanoparticles; nanostructures electron diffraction; high resolution electron microscopy
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Funding
- University of Texas at Austin
- Welch Foundation
- NSF
- Conacyt [50368]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0830074] Funding Source: National Science Foundation
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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 [111] and [112] 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. (c) 2008 Elsevier B.V. All rights reserved.
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