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What is a HAADF-STEM image?

HAADF-STEM: High-Angle Annular Dark Field Scanning Transmission Electron Microscopy

■Principle HAADF-STEM (High-angle Annular Dark Field Scanning TEM) images are obtained by scanning a finely focused electron beam across the sample and detecting the electrons that are scattered at high angles using an annular detector. ■Features Materials with a larger Z2ρ scatter more at high angles ↓ Heavy elements appear dark in STEM images and bright in HAADF-STEM images. Since contrast is obtained that is proportional to atomic number (Z), it is also referred to as Z-contrast imaging.

Related Link - https://www.mst.or.jp/casestudy/tabid/1318/pdid/30…

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Shape evaluation and composition distribution evaluation

What is a HAADF-STEM image?

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