Cambridge Encyclopedia » Cambridge Encyclopedia Vol. 23

electron diffraction - Theory, Electron diffraction in a TEM

electrons solid

An interference effect involving electrons from an incoming beam scattering from different layers of atoms in a solid, giving distinctive intensity patterns which can be used to determine the solid's structure. It is especially useful for surface studies, since electrons (being charged) do not penetrate far into the material. The original observation of electron diffraction was made in 1927 by US physicists Clinton Davisson and Lester Germer, and was crucial in establishing the dual wave-particle nature of electrons.

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