Abstract
The technology supporting the development of electron microscopy systems has reached such a high level that it is currently possible to investigate in a direct way the structure and composition of nanostructures at a sub-Angstrom resolution. Specifically, with the use of ultra-high resolution high angular annular dark field scanning transmission electron microscopy (HAADF-STEM) in the study of metal nanoalloys, it is now possible to describe in detail how two or more metals arrange themselves at atomistic level to form nanoparticles. In this chapter, we describe how the use of HAADF-STEM in conjunction with numerical simulations of the STEM process can be used as a direct way of analyzing chemical composition and structure at the nanoscale, and how the information obtained by this approach can be used later to investigate how local composition, atomistic arrangement, and shape correlate with the physicochemical properties of the nanostructure.
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Acknowledgements
The authors would like to acknowledge The Welch Foundation Agency Project # AX-1615, “Controlling the Shape and Particles Using Wet Chemistry Methods and Its Application to Synthesis of Hollow Bimetallic Nanostructures.” The authors would also like to acknowledge the NSF PREM Grant # DMR 0934218, Title: Oxide and Metal Nanoparticles—The Interface between life sciences and physical sciences. The authors would also like to acknowledge RCMI Center for Interdisciplinary Health Research CIHR. The project described was supported by Award Number 2G12RR013646–11 from the National Center for Research Resources. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Center for Research Resources of the National Institutes of Health.
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Mejía-Rosales, S., José-Yacamán, M. (2013). Experimental and Simulated Electron Microscopy in the Study of Metal Nanostructures. In: Metal Clusters and Nanoalloys. Nanostructure Science and Technology. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-3643-0_1
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DOI: https://doi.org/10.1007/978-1-4614-3643-0_1
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