Transmission Electron Microscopy for Materials Science
Transmission Electron Microscopy for Materials Science
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In this last video on dynamical scattering effects, we look at the case of double diffraction, which gives rise to the appearance of diffraction spots that are…
Dynamical scattering: double diffraction
From Cécile Hébert
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In this video we illustrate and explain the dynamical scattering effect of bend contours, as may be seen in bright-field and dark-field TEM images of crystalline samples.
Dynamical effects: bend contours
From Cécile Hébert
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In this video we illustrate and explain the dynamical scattering effect of thickness fringes, as may be seen in bright-field and dark-field TEM images.
Dynamical effects: thickness fringes
From Cécile Hébert
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In this addendum video, we relate our notations for dynamical scattering to various other notations you may find in the literature.
Notations for dynamical scattering
From Cécile Hébert
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In this video we introduce the concept of dynamical scattering – i.e. multiple elastic scattering – in the TEM. We further present the relevant scattering…
Dynamical scattering introduction
From Cécile Hébert
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In this video we show how the Ewald sphere/reciprocal lattice construction can be used to explain multiple beam scattering on a zone axis, by accounting for the effect…
Shape effects in the reciprocal lattice
From Cécile Hébert
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In this video, we show how a zone axis diffraction pattern can give scattering to multiple diffracted beams at the same time, and present a first theoretical way in…
Multiple beam scattering in electron diffraction
From Cécile Hébert
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In this video we now elaborate on the sample shape effect on the reciprocal lattice nodes in the case of 2-beam electron diffraction, by applying the theory of Fourier…
Deviation from Bragg scattering
From Cécile Hébert
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In this video we introduce the Ewald sphere, and show how its interaction with the reciprocal lattice can be used to explain 2-beam electron diffraction.
The Ewald sphere
From Cécile Hébert
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