I am a novice using Material Studio and the version I am using is 2019. I am currently using the Forcite module to calculate the adsorption effect of citric acid on the surface of diamond. The surface of diamond is saturated with hydroxyl groups to form bonds. When the lower surface is not saturated with bonds, adsorption can be clearly observed, but the adsorption energy is incorrect. When the lower surface is saturated with bonds, no adsorption is clearly observed. Could someone please help me? Thank you very much.