Emergent chemical mapping at atomic-column resolution by energy-dispersive x-ray spectroscopy in an aberration-corrected electron microscope.

نویسندگان

  • M-W Chu
  • S C Liou
  • C-P Chang
  • F-S Choa
  • C H Chen
چکیده

Chemical mapping at atomic-column resolution by energy-dispersive x-ray spectroscopy in a spherical aberration-corrected scanning transmission electron microscope (STEM) has been demonstrated for the 1.47-A dumbbell structure in InGaAs. The structural imaging and the chemical information in the two-dimensional map are directly correlated. Comparisons with the other existing mapping techniques of STEM in conjunction with electron energy-loss spectroscopy were discussed from aspects of ionization interactions.

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عنوان ژورنال:
  • Physical review letters

دوره 104 19  شماره 

صفحات  -

تاریخ انتشار 2010