In the second part of the talk, I will present a general method for determining 3D local structures at atomic resolution. By combining scanning transmission electron microscopy with a novel tomographic technique known as equally sloped tomography, we have imaged metallic nanoparticles at atomic resolution in three dimensions and revealed new atomic structure information that are hidden in conventional 2D projections. We expect this general method to find broad application in materials sciences, nanoscience, physics and chemistry.
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2. M. C. Scott, C.-C. Chen, M. Mecklenburg, C. Zhu, R. Xu, P. Ercius, U. Dahmen, B. C. Regan and J. Miao, “Electron tomography at 2.4 Å resolution”, Nature 483, 444–447 (2012).
3. C.-C. Chen, C. Zhu, E. R. White, C.-Y. Chiu, M. C. Scott, B. C. Regan, L. D. Marks, Y. Huang and J. Miao, “Three-dimensional imaging of dislocations in nanoparticles at atomic resolution”, Nature, in press (2013).