Electron Diffraction and Spectroscopy

Table of Contents

Electron Diffraction and Spectroscopy

Electron Diffraction (ED) and Spectroscopy (EDX, EELS)

Electron - Atom interaction

Elastic scattering: single atom

Diffraction & Interference

Elastic scattering: group of atoms

Example calculation of F(q)

Result

Exercise

outcome

Reciprocal lattice

Ewald sphere

Visible Ewald sphere

Ewald sphere of twinned crystals

PPT Slide

Diffraction intensities

Intensity distribution

Illuminating system

Convergent beam ED

HOLZ lines: high order Laue zones

ED applications

Unit cell symmetry

Ordering information: long range

Superreflections

Variant detection

Orientation relationships

Space group from FOLZ

Ordering information: short range

Interpretation diffuse intensities

Conclusion diffuse intensities: Cu3Pd

PPT Slide

Twinning

Long-period stackings

Principle position superreflections

Irregular stackings

In-situ transformations

interpretation

Less crystalline materials

Ring patterns

Spectroscopy

EDX principles

EDX example

EELS principles

Core-shell excitations

EELS detector configuration

EELS example

Energy Filtered TEM (EFTEM)

PPT Slide