We describe high-resolution imaging on gold decahedral nanoparticles and Ag/ZnO metal-semiconductors using off-axis electron holography in the dual-lens configuration. The spatial distribution found for Au nanoparticles facets was achieved by adjusting the objective dual-lens configuration to determine a field of view from 35 nm to 2.5 μm. The reliability of the electron holograms in the transmission electron microscope was obtained using the biprism voltage versus fringe spacing (θ) and versus fringe width (W) curves through an efficient scripting user interface that for gold particles considers the mean inner potential within the nanostructure, to determine the morphological shape of metallic nanostructures. Similarly, we report on the charge distribution observed around Ag/ZnO, a feature that enhances the potential of electron holography as a technique that is capable to resolve the spatial amplitude as well as phase distributions at a nanoscale level.
|Revista Cubana de Fisica
|Published - 2016
ASJC Scopus subject areas
- General Physics and Astronomy