Aberration-Corrected TEM

Aberration-Corrected TEM is a TEM equipped with hardware correctors (multipole lens systems) that eliminate spherical and chromatic aberrations — pushing the resolution limit below 0.5 Å and enabling direct imaging of individual atomic columns with unprecedented clarity.

How Does Aberration Correction Work?

• Spherical Aberration ($C_s$): Corrected using hexapole (Haider/CEOS) or quadrupole-octupole (Krivanek/Nion) corrector systems.
• Chromatic Aberration ($C_c$): Corrected using combined electric-magnetic multipole systems (Wien-type).
• Probe Corrector: Corrects the illumination probe (for STEM). Image Corrector: Corrects the imaging lens (for TEM).
• Resolution: Sub-50 pm (0.5 Å) point resolution — resolving individual atomic columns.

Why It Matters

• Resolution Revolution: Enabled direct imaging of light atoms (O, N, Li) alongside heavy atoms.
• Quantitative: Aberration-corrected images can be directly compared to simulations for atomic structure determination.
• Standard: $C_s$-corrected TEMs are now standard in semiconductor R&D labs worldwide.

Aberration-Corrected TEM is perfect lenses for electrons — removing optical distortions to see individual atoms with sub-angstrom clarity.