Direct structure determination by atomic-resolution incoherent STEM imaging

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Description

Use of a large, annular dark-field (ADF) detector in a scanning transmission electron microscope is shown to give images that can allow direct structure determination, being a convolution between the illuminating probe intensity and an object function localized at the atomic column positions. The ADF image is also shown to resolve crystal spacings more than twice smaller than the phase contrast point resolution limit of the microscope used, with sub-angstrom structural information being retrieved. ADF image of several semiconductor materials are studied.

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4 p.

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Nellist, P.D.; Xin, Y. & Pennycook, S.J. November 1, 1997.

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Description

Use of a large, annular dark-field (ADF) detector in a scanning transmission electron microscope is shown to give images that can allow direct structure determination, being a convolution between the illuminating probe intensity and an object function localized at the atomic column positions. The ADF image is also shown to resolve crystal spacings more than twice smaller than the phase contrast point resolution limit of the microscope used, with sub-angstrom structural information being retrieved. ADF image of several semiconductor materials are studied.

Physical Description

4 p.

Notes

OSTI as DE98001838

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  • Biennal conference of the Electron Microscopy and Analysis Group of the Institute of Physics, Cambridge (United Kingdom), 2-5 Sep 1997

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  • Other: DE98001838
  • Report No.: ORNL/CP--95489
  • Report No.: CONF-970911--
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 564249
  • Archival Resource Key: ark:/67531/metadc696529

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  • November 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Jan. 25, 2016, 12:25 p.m.

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Nellist, P.D.; Xin, Y. & Pennycook, S.J. Direct structure determination by atomic-resolution incoherent STEM imaging, article, November 1, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc696529/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.