Ultrahigh-resolution Scanning Transmission Microscopy with Sub-?ngstrom-Sized Electron Beams

Journal Article · Sat Jan 01 04:00:00 EST 2005 · Journal of Crystallography Society of Japan

DOI:https://doi.org/10.5940/jcrsj.47.26· OSTI ID:934474

Abe, E. ^[1]; Pennycook, Stephen J ^[2]

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1. University of Tokyo, Tokyo, Japan
2. ORNL

The scanning transmission electron microscope(STEM)with an annular dark-field(ADF) detector provides atomic-resolution incoherent images, whose resolution is dominated, to a good approximation, by the size of convergent electron beams. Improving a spherical aberra- tion of microscope objective lenses has been successful in converging the beam into sub- scale, promising a remarkably higher resolution for STEM. Here we describe the performance of aberration-corrected 300kV-STEM - the world-best STEM available today. The results clearly demonstrate that a sub- ngstrom resolution has been indeed achieved for not only simple structures but also structurally complex systems(quasicrystals).

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 934474
• Journal Information: Journal of Crystallography Society of Japan, Journal Name: Journal of Crystallography Society of Japan Journal Issue: 1 Vol. 47; ISSN 0369-4585
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
ELECTRON BEAMS
ELECTRON MICROSCOPES
GEOMETRICAL ABERRATIONS
LENSES
PERFORMANCE
RESOLUTION
SCANNING ELECTRON MICROSCOPY
TRANSMISSION ELECTRON MICROSCOPY
quasicrystal stem