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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Novel Approach for High-Resolution Elastic Behavior Assessment of Alloyed Strained Nanostructures

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Montoro, Luciano A. [1] ; Medeiros-Ribeiro, Gilberto [1, 2] ; Ramirez, Antonio J. [1]
Total Authors: 3
[1] Brazilian Synchrotron Light Lab, BR-13083970 Campinas, SP - Brazil
[2] Hewlett Packard Labs, Palo Alto, CA 94303 - USA
Total Affiliations: 2
Document type: Journal article
Source: Journal of Physical Chemistry C; v. 114, n. 29, p. 12409-12415, JUL 29 2010.
Web of Science Citations: 3

The quantification of the strain/stress state with high spatial resolution of nanostructured materials is essential for several applications and recent technologies. Several methods have been proposed and applied to address the strain state of such materials, for example, the traditional strain state analysis from high-resolution transmission electron microscopy (HRTEM) images. However, most of these methods fail when dealing with alloyed strained nanostructured materials. Such systems presents both intrinsic (due to chemical variations) and extrinsic (due to externally imposed stresses) strain which make proper analysis difficult. Here is presented a new methodology for high-resolution elastic behavior (strain, stress, elastic energy) assessment of alloyed strained nanostructures based on quantitative high-resolution transmission electron microscopy. The application of this technique to quantify the elastic behavior of the model system Si-Ge:Si(001) shows that this methodology arises as a remarkable tool for accurate chemical and elastic state evaluation, which can be applied to several strained alloyed nanostructures, such as epitaxial islands, nanowires, nanocrystals, and thin films. (AU)

FAPESP's process: 02/04151-9 - Analytical transmission electron microscope for spectroscopic nanocharacterization of materials
Grantee:Daniel Mario Ugarte
Support type: Regular Research Grants
FAPESP's process: 07/05165-7 - Quantitative transmission electron microscopy (QHRTEM): developments and application to a study of a nanostructured semiconductor
Grantee:Luciano Andrey Montoro
Support type: Scholarships in Brazil - Post-Doctorate