Multi-slice HRTEM image simulations

In this paper, we review the determination of the shape and the structure of metal particles by electron microscopy as illustrated by examples of Pd clusters epitaxially oriented on oxide single crystals and thin films of MgO and ZnO. The metal-oxide interfaces are characterized by HRTEM profile-view imaging, numerical analysis of the images, and image simulations by the multi-slice technique. 

The HRTEM images of the particles annealed under UHV or in low pressures (10 torr) of O2 show that the junction between the (111) and (100) faces is sharp. Comparison of the experimental images with images simulated by the multi-slice technique shows that this junction is atomically sharp. On annealing at higher pressures (10 torr) progressive rounding occurs at the corners this is completely reversible by reduction in H2. 

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