And friction force (FF) pictures with the laser-patterned DLN film are shown in Figure 10. A area close to the corner with the microcrater structure was examinedCoatings 2021, 11,12 ofto evaluate the friction forces on the original and laser-patterned DLN surface. Comparable towards the prior studies [25], the LFM imaging was carried out using worn Si tips with the tip radius of 0.five . The friction contrast is clearly observed and characterized by significantly reduce friction forces within the laser-patterned region than on the original surface, see Figure 10b. As a result of relatively deep craters, the contribution of your surface relief slope towards the lateral force signal isn’t fully compensated for the duration of subtraction of two lateral force images [46], leading to “higher friction” in the crater edges. The decrease friction forces in the laser-patterned region are accompanied with a lot decrease pull-off forces (Fpull-off ) than on the original film, as confirmed by the force istance curves (Figure 11a) measured in distinctive positions inside the FF image in Figure 10b, namely: (1) Fpull-off = 1290 nN on the original film, (2) Fpull-off = 990 nN near the region of redeposited material, (3) Fpull-off = 63 nN inside the region of redeposited material, and (4) Fpull-off = 16 nN in the center of a crater. This signifies that the ablated and redeposited AZD1656 Purity material adjustments the nanoscale surface properties within and around the laser-produced Neoabietic acid medchemexpress microcraters. The location with the low-friction area with redeposited material covers the distance of 102 in the crater edge and, including the crater, it covers a circle region of 157 radius. The occurrence of your area “2” with slightly decrease friction and pull-off force (than on original Coatings 2021, 11, FOR PEER Evaluation 13 of 16 Coatings 2021, 11, xxFOR PEER Evaluation 13 of to surface) is in all probability triggered by mass distribution of ablated clusters/particles, top 16 variation inside the structure and/or thickness of your redeposited layer.Figure 10. Surface relief (a) and friction force (b) photos on the laser-patterned DLN film close to the corner of a microcrater Figure ten. Surface relief (a) and friction force (b) pictures with the laser-patterned DLN film near the corner of a microcrater Figure 10. Surface relief (a) and friction force (b) pictures of the laser-patterned DLN film near the corner of a microcrater structure (shown in Figure 1a), load on Si tip 120 nN. The marked points (1,2,three,four) inside the image would be the places of forcestructure (shown in Figure 1a), load onon tiptip 120 nN. The marked points (1,2,3,four) inFFimageimage would be the locations of structure (shown in Figure 1a), load Si Si 120 nN. The marked points (1,two,three,four) inside the FF FF will be the locations of forcethe distancecurves measurements, shown in Figure 11. curves measurements, shown in Figure 11. distance force istance curves measurements, shown in Figure 11.Figure 11. (a) The force istance curves measured unique points on the DLN film (marked in in the FF image in Figure Figure 11. (a) The force istance curves measured inindifferent points around the DLN film (markedthe FF image in Figure 10b): Figure 11. (a) The force istance curves measured in distinctive points on the DLN film (markedin the FF image in Figure 10b): (1) original film, (two) near the area of redeposited material, (3) within the area of redeposited material, 4) inside the center 10b): (1) original film, (two) the area of redeposited material, (three) in(3) inside the area of redeposited material, 4) in center of a (1) original film, (two) near close to the regio.
