Fig 2 - uploaded by Bian Jianjun
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At different simulation times as shown in (a) ∼ (f), the graphene flake moves to different positions.
Source publication
The oscillation of a graphene flake on a substrate with undulated surface is investigated by classical molecular dynamics simulation. The gradient in amplitude of the undulation is found to provide the driving force for the motion of the graphene flake, which slides on top of a graphene layer that well conforms to the substrate. The oscillatory mot...
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... representative positions of the graphene flake at different simulation times are shown in Fig. 2. At the beginning of the simulation, the graphene flake is positioned at one end of the substrate. Its motion is initially restricted by blocking the displacement of one of its edges. Both the graphene flake and the graphene layer well conform to the undulated profile of the substrate. Therefore, the flake has a periodic out-of-plane ...
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... Its motion is initially restricted by blocking the displacement of one of its edges. Both the graphene flake and the graphene layer well conform to the undulated profile of the substrate. Therefore, the flake has a periodic out-of-plane bending deformation of magnitude that decreases when going from the border of the substrate toward its center (Fig. 2a). When the edge of the flake is released, the flake starts to move toward the direction with decaying amplitude (Fig. 2b). As the flake moves to the middle region of the substrate where the amplitude is lowest, its translational velocity reaches a maximum (Fig. 2c). After crossing the middle region, the flake continues to move forward ...
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... layer well conform to the undulated profile of the substrate. Therefore, the flake has a periodic out-of-plane bending deformation of magnitude that decreases when going from the border of the substrate toward its center (Fig. 2a). When the edge of the flake is released, the flake starts to move toward the direction with decaying amplitude (Fig. 2b). As the flake moves to the middle region of the substrate where the amplitude is lowest, its translational velocity reaches a maximum (Fig. 2c). After crossing the middle region, the flake continues to move forward toward a region of increasing amplitude, albeit with decreasing velocity (Fig. 2d). When the velocity vanishes, the flake ...
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... that decreases when going from the border of the substrate toward its center (Fig. 2a). When the edge of the flake is released, the flake starts to move toward the direction with decaying amplitude (Fig. 2b). As the flake moves to the middle region of the substrate where the amplitude is lowest, its translational velocity reaches a maximum (Fig. 2c). After crossing the middle region, the flake continues to move forward toward a region of increasing amplitude, albeit with decreasing velocity (Fig. 2d). When the velocity vanishes, the flake reaches the other end of the substrate (Fig. 2e). At this point the gradient in amplitude induces the flake to revert its motion (Fig. 2d), and ...
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... move toward the direction with decaying amplitude (Fig. 2b). As the flake moves to the middle region of the substrate where the amplitude is lowest, its translational velocity reaches a maximum (Fig. 2c). After crossing the middle region, the flake continues to move forward toward a region of increasing amplitude, albeit with decreasing velocity (Fig. 2d). When the velocity vanishes, the flake reaches the other end of the substrate (Fig. 2e). At this point the gradient in amplitude induces the flake to revert its motion (Fig. 2d), and the whole process repeats until the dissipation due to friction fully damps the motion of the flake. Indeed, owing to friction, the position reached at ...
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... middle region of the substrate where the amplitude is lowest, its translational velocity reaches a maximum (Fig. 2c). After crossing the middle region, the flake continues to move forward toward a region of increasing amplitude, albeit with decreasing velocity (Fig. 2d). When the velocity vanishes, the flake reaches the other end of the substrate (Fig. 2e). At this point the gradient in amplitude induces the flake to revert its motion (Fig. 2d), and the whole process repeats until the dissipation due to friction fully damps the motion of the flake. Indeed, owing to friction, the position reached at the end of each period is not the same as the initial position but progressively closer to ...
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... a maximum (Fig. 2c). After crossing the middle region, the flake continues to move forward toward a region of increasing amplitude, albeit with decreasing velocity (Fig. 2d). When the velocity vanishes, the flake reaches the other end of the substrate (Fig. 2e). At this point the gradient in amplitude induces the flake to revert its motion (Fig. 2d), and the whole process repeats until the dissipation due to friction fully damps the motion of the flake. Indeed, owing to friction, the position reached at the end of each period is not the same as the initial position but progressively closer to the center of the substrate. moves horizontally, its rotation angle with respect to the ...
