Physical Factors That Determine The Work Function For A Given Material
Due to the complications described in the modelling section below, it is difficult theoretically predict the work function with good accuracy. Various trends have however been identified. The work function tends to be smaller for metals with an open lattice, and larger for metals in which the atoms are closely packed. It is somewhat higher on dense crystal faces than open crystal faces, also depending on surface reconstructions for the given crystal face.
Read more about this topic: Critical Absorption Energy
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