Journal
ULTRAMICROSCOPY
Volume 156, Issue -, Pages 1-8Publisher
ELSEVIER
DOI: 10.1016/j.ultramic.2015.04.010
Keywords
Quantitative ADF; Electron channelling; Sample tilt
Categories
Funding
- EPSRC
- Johnson-Matthey
- European Union [312483 - ES-TEEM2]
- Australian Research Council [DP110102228, DP140102538, DE130100739]
- Engineering and Physical Sciences Research Council [1104171] Funding Source: researchfish
- Australian Research Council [DE130100739] Funding Source: Australian Research Council
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An approach towards experiment design and optimisation is proposed for achieving improved accuracy of ADF STEM quantification. In particular, improved robustness to small sample mis-tilts can be achieved by optimising detector collection and probe convergence angles. A decrease in cross section is seen for tilted samples due to the reduction in channelling, resulting in a quantification error, if this is not taken into account. At a smaller detector collection angle the increased contribution from elastic scattering, which initially increases with tilt, can be used to offset the decrease in the TDS signal. (C) 2015 Elsevier B.V. All rights reserved.
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