Chain length effect of alkanethiol self-assembled monolayers on the maximum spreading ratio of impacting water droplets

Interfacial behavior of alkyltrichlorosilane monolayers on silicon: Control of flat-band potential and surface state distribution using chain length variation

“…The intensity and peak positions of the C-H stretching vibrational modes (-CH 2 ) of monolayer provide information on the monolayer formation rates and structural changes during the course of the growth process. For example specific shifts from 2928 to 2919 cm À1 and from 2856 to 2850 cm À1 for the methylene peaks are well known on going from a liquid to solid alkane [50,51] phase and therefore, the observed wavenumbers in our case are indicative of a densely packed monolayer of alkyl chains. Further, the asymmetric C-H stretching mode of terminal CH 3 appearing at 2958 cm À1 is a clear signature of orientated monolayer formation.…”

Studying the interactions of drugs and hydrophobic model membranes using contact angle goniometry

“…Results suggest that the alkane thiol SAM with longer chain length is more hydrophobic than the one with shorter chain length, which is in good agreement with the literature [24]. However, the contact angle values for the octadecanethiol and decanethiol SAMs reported in this study deviate slightly from the contact angles reported earlier.…”

“…However, the contact angle values for the octadecanethiol and decanethiol SAMs reported in this study deviate slightly from the contact angles reported earlier. This is most probably due to the fact that our values are static contact angles whereas the ones reported elsewhere are dynamic contact angles [24][25][26]. The static contact angle for octadecanethiol SAM is between the advancing and receding contact angle reported in the literature [24][25][26] and also for the decanethiol SAM the static contact angle is less than the advancing one [24].…”

“…This is most probably due to the fact that our values are static contact angles whereas the ones reported elsewhere are dynamic contact angles [24][25][26]. The static contact angle for octadecanethiol SAM is between the advancing and receding contact angle reported in the literature [24][25][26] and also for the decanethiol SAM the static contact angle is less than the advancing one [24]. In the light of the studies of Yang et al [26] and Kwok et al [29] our values seem to be quite low, since the advancing contact angle measured using low velocities of the three-phase contact line should give values close to the static contact angle.…”

Electrochemical and surface analytical studies of the self-assembled monolayer of 5-methoxy-2-(octadecylthio)benzimidazole in corrosion protection of copper

“…Tan et al [32] reported that the molecular thicknesses of all the benzene thiol films on copper are less than 2 nm and interpreted that the surface layer is restricted to a chemisorbed monolayer. Some authors [66,67] have reported the film thickness of around 2 nm for the alkanethiol surface films. They interpreted that the intermolecular interaction between the alkyl chains is responsible for the formation of ordered monolayer but not a multilayer.…”