Investigation of the structure of fluoroalkylsilanes deposited on alumina surface

Self-assembled monolayers of perfluoroalkylsilane on plasma-hydroxylated silicon substrates

“…3B shows the low frequency region (2000-900 cm −1 ), among which the absorption peaks around 1020.2 cm −1 assigned to the stretching vibration of Si-O-Si, and all of the peaks at about 1699.2 cm −1 attributed to the carbonyl stretching mode of the fluoroalkylsilanes. Besides, the bands at 1138.0 and 1231.3 cm −1 corresponded to the stretching vibration of C-F bonds, which originated from the fluoroalkyl chain [33,42]. Peaks at 1402.5 and 1545.7 cm −1 ascribed to the vibration of C-N and N-H, respectively.…”

“…Based on the excellent properties of C-F bonds, perfluorinated chemicals have been widely employed in a variety of fields including liquid (water/oil)-repellency, lubricating ability, adhesion, friction, oxidation resistance, and so on [10,33,34]. C-F bonds are stronger in organic chemistry with a binding energy of 485.7 kJ/mol, which ascribed to the large gap in the electronegativity between fluorine and carbon elements (F: 4.0, C: 2.5).…”

The Effect of Physicochemical Properties of Perfluoroalkylsilanes Solutions on Microtribological Features of Created Self-Assembled Monolayers

“…It means that shorter compounds like FPTS, with the length obtained from the theoretical model, determined using HyperChem 7.5 equal to 0.70 nm, tend to form a vertical orientation, which is connected with the creation of a multi-layer structure (thickness from 8.81 nm for 0.50% to 4.46 nm for 0.10%). On the other hand, longer compounds like FDTS, with a theoretical length equal to 1.64 nm [48], create horizontally oriented structures relative to the investigated surface and, as a consequence, better packed structured coverage. Thus, it can be stated that both the type of the modifier and the solution concentration has a significant impact on the thickness of the layer, as can be seen in Figure 7.…”

Application of organosilane coatings for improved anti‐adhesive properties enabling facilitated demolding in polymer processing

“…Organosilane coatings offer several advantages over PVD and CVD coatings, including (i) comparatively simple application via liquid phase deposition, (ii) precise adjustment of hydrophobic and anti‐adhesive properties due to a wide range of silane monomers, (iii) covalent attachment of the anti‐adhesive coating instead of physical deposition as with the widely used PVD layers, as well as (iv) layer thicknesses in the range of tens of nanometers, which do not change the microstructure of the coated surfaces. In addition to the preparation of low‐energy surfaces, organosilanes are employed to protect metal surfaces from corrosion or bio‐fouling and to reduce water and air drag 16–19 …”