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Carbon nanotube-based charge-controlled speed-regulating nanoclutch
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10.1063/1.4724344
/content/aip/journal/jap/111/11/10.1063/1.4724344
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/11/10.1063/1.4724344

Figures

Image of FIG. 1.
FIG. 1.

(a) Cross sectional view of the proposed CNT-CC-SRNC model. Two pink circles are inner and outer CNTs with radii Ri and Ro , respectively. In this work, Ri for (20, 20) CNT is 1.3846 nm and Ro for (40, 40) CNT is 2.7693 nm. Green and white particles represent oxygen and hydrogen atoms of water molecules, respectively. While the inner CNT rotates at an angular velocity of rad/ns, we assume the angular velocity of outer CNT is rad/ns. (b) Geometry of the charged CNT surface. Blue and black spheres represent the carbon atoms of positive and negative charges, respectively.

Image of FIG. 2.
FIG. 2.

The angular velocity of the outer CNT versus the charge magnitude q on carbon atoms for the inner CNT rotating at a constant angular velocity of 100 rad/ns.

Image of FIG. 3.
FIG. 3.

For q = 1.0 e, the angular velocity of the outer CNT versus the rotational period of the inner CNT. The solid line represents the linear fit of the MD data.

Image of FIG. 4.
FIG. 4.

For the rotational period of the inner CNT  = 20 ps, the angular velocity profiles of confined water in CNT-CC-SRNC model along theradial direction of CNTs for the charge magnitude on carbon atoms q in the range of 0.0 e (uncharged) to 1.0 e. The partial enlarged drawing presents thedetails of the profiles with the radial distance in the range of 2.05–2.45 nm to illustrate the motion of boundary water molecules adjacent to the outer CNT.

Image of FIG. 5.
FIG. 5.

For the rotational period of the inner CNT  = 20 ps, the angular velocity profiles of confined water in CNT-CC-SRNC model along the radial direction of CNTs for water temperature of 200, 300, and 400 K, respectively. The partial enlarged drawing presents the details of the profiles with the radial distance in the range of 2.05–2.45 nm to illustrate the motion of boundary water molecules adjacent to the outer CNT.

Image of FIG. 6.
FIG. 6.

For the rotational period of the inner CNT  = 20 ps, the number density of water molecules in CNT-CC-SRNC model along the radial direction of CNTs for water temperature of 200, 300, and 400 K, respectively.

Image of FIG. 7.
FIG. 7.

The angular velocity profiles of confined water in CNT-CC-SRNC model along the radial direction of CNTs for the inner CNT-driven and outer CNT-driven modes. The CNT rotating angular velocity is 100 rad/ns.

Tables

Generic image for table
Table I.

Boundary slip velocity vs , interfacial shear stress , and the interfacial friction coefficient f =  at the interface between inner CNT and water for the inner CNT rotating at a constant angular velocity of 100 rad/ns. q varies in the range of 0.0–1.0 e.

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/content/aip/journal/jap/111/11/10.1063/1.4724344
2012-06-04
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Carbon nanotube-based charge-controlled speed-regulating nanoclutch
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/11/10.1063/1.4724344
10.1063/1.4724344
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