Direct sub-angstrom imaging of a crystal lattice.
Science
; 305(5691): 1741, 2004 Sep 17.
Article
em En
| MEDLINE
| ID: mdl-15375260
ABSTRACT
Despite the use of electrons with wavelengths of just a few picometers, spatial resolution in a transmission electron microscope (TEM) has been limited by spherical aberration to typically around 0.15 nanometer. Individual atomic columns in a crystalline lattice can therefore only be imaged for a few low-order orientations, limiting the range of defects that can be imaged at atomic resolution. The recent development of spherical aberration correctors for transmission electron microscopy allows this limit to be overcome. We present direct images from an aberration-corrected scanning TEM that resolve a lattice in which the atomic columns are separated by less than 0.1 nanometer.
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Base de dados:
MEDLINE
Idioma:
En
Revista:
Science
Ano de publicação:
2004
Tipo de documento:
Article
País de afiliação:
Estados Unidos