The greater roughness, opposite to the friction-on-roughness dependence in the macroscale. For the microcrater pattern shown in Figures 1a and 10, the effect seems to be even more surprising than for the microgroove patterns because of a considerably thinner layer of nanoparticles formed in the course of fs-laser processing. These findings are of fantastic interest in fundamental nanotribological studies of carbon-based films [52], and they clearly demonstrate the efficiency of fs-laser ablation processing of DLN films to handle the nano-/microfriction behavior from the challenging coatings with prospective applications in micro/nanoelectromechanical systems and small-scale devices operating in humid air environments. 4. Conclusions Tribological properties of your DLN coatings deposited on silicon and steel substrates have been studied beneath various circumstances influenced by environments (humid air, water and oil lubrication, elevated temperatures) and laser 5′-O-DMT-2′-O-TBDMS-Ac-rC Technical Information surface texturing. Comparative tribological tests of difficult DLN films in humid air and under water sliding against different counterbodies (steel, silicon-nitride) have demonstrated the low-friction and low-wear overall performance in the films beneath water lubrication, in the absence of chemical interaction of water with all the counterbody surface. A sturdy effect of the aqueous environment on the put on behavior was revealed for the DLN/Si3 N4 tribopair: the put on prices of the film and Si3 N4 ball in water, W = 7.5 10-9 mm3 /(Nm) and W = two.six 10-9 mm3 /(Nm), were identified to be significantly reduced than the corresponding values W = 6.eight 10-7 mm3 /(Nm) and W = three.8 10-8 mm3 /(Nm) in humid air, in spite of greater friction in water-lubricated sliding. Specific attention in this operate has been paid to the high-precision surface texturing of DLN films with femtosecond-laser pulses and fabrication of microcrater-based structures of hexagonal geometry, followed by tribological testing of the laser-textured DLN samples below oil lubrication at diverse temperatures, from 23 to one hundred C. The influence of laser surface texturing is discovered Neuronal Signaling| inside the improved friction performance at each the space temperature (in comparison to the original films) and elevated temperatures, when the oil viscosity changed from = 945 mm2 /s at 23 C to = 20.four mm2 /s at 100 C (mineral oil MS20). The friction coefficient was decreased from v = 0.1 for the original film to v = 0.Coatings 2021, 11,14 offor the laser-textured surface at area temperature, then to v = 0.068 at 100 C. The obtained final results evidence that the friction reduction at elevated temperatures is controlled by the total effect of higher stresses at the crater edges (“artificial” roughness), lubricant film stress lift, and put on from the counterbody, characteristic on the mixed lubrication regime of sliding. In addition to the macroscale friction studies with the laser-textured films, it’s shown that the nano-/microfriction behavior on the microcrater-based surface structure is characterized by considerably decrease friction forces than the original surface resulting from strong influence on the capillary forces on friction forces in humid air environment. The findings of this operate proof about excellent tribological properties in the DLN coatings in a variety of environments, which can be additional improved by high-precision surface texturing with femtosecond-laser pulses.Author Contributions: S.M.P.: writing–original draft preparation, writing–reviewing and editing, project administration; E.V.Z.: investigation; O.