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Nanotube-based scanning rotational microscope
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View: Figures


Image of FIG. 1.
FIG. 1.

The scheme of the SRM head with a chemically functionalized tip. A piezo actuator (1) is applied to move a single-walled nanotube (2) and, thus, induce screw motion of the inner wall (3) of the double-walled nanotube used as a bolt/nut pair relative to the outer wall (4). A piezo actuator (5) is used to prevent the translational motion of the inner wall (3) with a chemically attached molecule (6) relative the surface or nanoobject of investigation (7). An electrode (8) is used to apply voltage and measure the tunneling current between the molecule (6) and the nanoobject (7).

Image of FIG. 2.
FIG. 2.

(a) Model cell with one unit cell of the (4,1)@(12,3) DWNT. (b) The inner (4,1) DWNT with a single vacancy in each unit cell. Carbon atoms of the inner and outer walls are colored in red and blue, respectively. The periodic boundary condition is applied along the x-axis. (c) Calculated potential relief of interwall interaction energy U (in meV per nanotube unit cell) as a function of the relative displacement x (in Å) of the walls along the nanotube axis and the angle (in degrees) of the relative rotation of the walls about the axis for the (4,1)@(12,3) DWNT with a single vacancy in each unit cell of the inner (4,1) wall. The energy is given relative to the global energy minimum.

Image of FIG. 3.
FIG. 3.

Two (4,1) nanotubes interacting via their caps. Carbon and hydrogen atoms are colored in gray and white, respectively.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Nanotube-based scanning rotational microscope