Problem 2

Interactions in the adsorbed monolayer

Henry's Law behavior requires that particles adsorbed on the surface don't interact with each other, which is not the case for higher coverages. In this problem you will look at such effects.

1. At T = 0.9, $\epsilon = 7.5$, run simulations at log(P) = -4.5, -4.0, -3.5 and -3.0. At each pressure, obtain the average adsorption and the average potential energy of the simulation.

2. Determine the average potential energy per adsorbed particle (note that the surface area is 64 (8x8) in the atomic-diameter units used in the simulation (see Simulation model).

3. Each surface-particle interaction is worth 7.5 energy units. Use this to determine the average energy of interaction between a particle and its neighbors. Explain how this changes as the coverage increases.