Two Parallel Plates Covered with Surface Layers

15 TWO PARALLEL PLATES COVERED WITH SURFACE LAYERS 

It is possible to derive the interaction energy between particles with multilayer structures [4,10,11]. Consider the interaction between two parallel similar plates separated by a distance h (Fig. 19.18). Let the thicknesses of the plate core and the 

FIGURE 19.18 Two parallel similar plates of substance 1 and thickness L covered by a surface layer of substance 2 and thickness d separated at a separation /r in a medium 3. 

For very small h(h d and h 3 L), Eq. (19.59) becomes the interaction energy between the two surface layers of substance 2 in a medium 3, namely. 

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