Probing core-electron orbitals by scanning transmission electron microscopy and measuring the delocalization of core-level excitations

Probing core-electron orbitals by scanning transmission electron microscopy and measuring the delocalization of core-level excitations

By recording low-noise energy-dispersive x-ray spectroscopy maps from crystalline specimens using aberration-corrected scanning transmission electron microscopy, it is possible to probe core-level electron orbitals in real space. Both the 1s and 2p orbitals of Sr and Ti atoms in SrTiO3 are probed, and their projected excitation potentials are determined. This paper also demonstrates experimenta...

Morphology of the ferritin iron core by aberration corrected scanning transmission electron microscopy.

As the major iron storage protein, ferritin stores and releases iron for maintaining the balance of iron in fauna, flora, and bacteria. We present an investigation of the morphology and iron loading of ferritin (from equine spleen) using aberration-corrected high angle annular dark field scanning transmission electron microscopy. Atom counting method, with size selected Au clusters as mass stan...

15. Scanning Transmission Electron Microscopy

Open-core screw dislocations in GaN epilayers observed by scanning force microscopy and high-resolution transmission electron microscopy

Structural investigations of organometallic vapor phase epitaxy grown #-GaN films using high-resolution transmission electron microscopy and scanning force microscopy have revealed the presence of tunnel-like defects with 35–500 Å radii that are aligned along the growth direction of the crystal and penetrate the entire epilayer. These defects, which are termed ‘‘nanopipes,’’ terminate on the fr...

Examination of Lung Parenchyma by Electron Microscopy

In this paper many of the principal struc­ture of the Moral Lung were studied with the help of Electron Microscopy. Detailed descrip­tion was given of Granular Pneumocytes, Membranous Pneumocytes, Macrophages, and Alveolar Capillaries. A discussion followed on the form and function of Granular Pneumo­cytes.  Acknowledgements  I am grateful to the Reza Shah Pahlavi Foundation for its generou...