kJ mol -1 . While for the Hexadecane results z 0 = 0.18 nm, z 1 = 0.4 nm and z 2 = 1.8 which yielded ∆µ 0 sa = -32.4 kJ mol -1 . For the adsorption of GMO from PAO4, we used z 0 = 0.22 nm, z 1 = 0.59 nm and z 2 = 1.4 nm and obtained an adsorption energy ∆µ 0 gmo = -41.8 kJ mol -1 . Whereas for the corresponding Hexadecane results z 0 = 0.25 nm, z 1 = 0.57 nm and z 2 = 1.63 which yielded ∆µ 0 gmo = -39.0 kJ mol -1 . For GMS the same values of z 0 , z 1 and z 2 are used as in GMO-PAO4 and the adsorption energy is ∆µ 0 gms = -34.2 kJ mol -1 . The value of n c was taken as 17 for SA and GMS and 15 for GMO, since the C atoms involved in the alkene group are not counted.