Adsorption parameters as determined by Hill adsorption isotherm for the SAMN formation of DMBOC18 and ISAOC18 at the heptanoic acid/HOPG interface at room temperature.

Molecule	K ± SD (mol dm−3)	n ± SD	Δ SAM G ⊖ ± SD (kJ mol−1)
	(2.34 ± 0.03) × 10−3	7.0 ± 0.5	−15.02 ± 0.03
	(1.39 ± 0.02) × 10−5	15 ± 2	−27.72 ± 0.04