Fig. 1: Controlling CLF by tuning surface hydrophobicity with OTS SAM.
From: Droplet slipperiness despite surface heterogeneity at molecular scale
a, We observe that CLF depends on heterogeneity of the SAM and has lowest values both at low and high SAM coverage regimes, and highest values at intermediate coverages. b, Schematics of the vapour deposition reactor chamber for growing SAMs, featuring operando spectroscopic ellipsometry for continuous in situ monitoring the growth of SAM films. Numbers represent (1) the reactor chamber with OTS molecules (illustrated by short green lines), (2) the substrate, (3) operando ellipsometer and (4) viewports of the reactor chamber. c, Adsorption mechanisms of OTS SAM on hydroxyl-rich surfaces: (I) OTS molecules first hydrolyse using surface-bound water. The hydrolysed OTS molecules then bond covalently to surface hydroxyl groups. (II) Alternatively, OTS molecules may form covalent bonds directly to surface hydroxyl groups.
