Lateral force microscopy of multiwalled carbon nanotubes

Peeling of Long, Straight Carbon Nanotubes from Surfaces

“…Taken collectively, the data presented in Figures 5 and 6 suggests that the number and extent of slip events is indicative of the strength of adhesion between the nanotube and the surface; that is, -CH3 < -OH < -NH2. This trend is consistent with previously published adhesion measurements [20,30,[32][33][34]40]. The results in Figures 3 and 6 may, at first glance, appear to be in conflict.…”

“…Similarly, the friction coefficients were estimated to be 0.34 ± 0.02, and 0.47 ± 0.02 for 11-hydroxyl-, and 11-amino-undecanethiol, respectively. These results are in the ranges seen by others who worked on friction of Si N AFM tips and self-assembled monolayers and different carbon materials [20,27,28,35,48].…”

“…Under certain conditions, buckled CNT-tips will either slide freely across the surface or slip and then stick at specific locations on the surface [17][18][19][20]. Indeed, surface roughness and composition play a large role in determining which phenomenon will take place.…”

Nanotribology and Electrical Properties of Carbon Nanotubes Hybridized with Covalent Organic Frameworks

“…The lateral force profiles obtained (Fig. 2C) were similar to the others [47], presenting a peak in the lateral force which corresponded to the maximum friction force between the tip and the nanotube, just before the tip slipped to the other side of the tube. This peak depended on the tip velocity (Fig.…”

“…In order to quantify the data obtained when the AFM tip was dragged onto the surface to move the individual nanotubes, it was necessary to calibrate the torsional stiffness. Although several methodologies are available [45,46] the dragging of carbon nanotubes on surfaces is not usually calibrated [19,33,47,48]. Firstly, the lateral spring constant K L can be simply calculated using the equation [49]:…”