The DCAs also adsorb stronger to larger PAHs because this enables them to bind through a larger number of functional groups. We decompose the adsorption free energies from the MD simulations into entropic and enthalpic components, and find that the enthalpy term dominates for both surfactants. This observation contrasts to surfactant adsorption from aqueous solution, where there is usually an increase in entropy due to the release of surface-bound water molecules.