Buckling behaviour of composites with double walled nanotubes from carbon and phosphorus

Cai

et al. 2018

IJMS

Self Cite

By bending a straight carbon nanotube and bonding both ends of the nanotube, a nanoring (or nano-wheel) is produced. The nanoring system can be driven to rotate by fixed outer nanotubes at room temperature. When placing some atoms at the edge of each outer tube (the stator here) with inwardly radial deviation (IRD), the IRD atoms will repulse the nanoring in their thermally vibration-induced collision and drive the nanoring to rotate when the repulsion due to IRD and the friction with stators induce a non-zero moment about the axis of rotational symmetry of the ring. As such, the nanoring can act as a wheel in a nanovehicle. When the repulsion is balanced with the intertubular friction, a stable rotational frequency (SRF) of the rotor is achieved. The results from the molecular dynamics simulation demonstrate that the nanowheel can work at extremely low temperature and its rotational speed can be adjusted by tuning temperature.

Section: Models and Methodologymentioning

confidence: 99%

Thermal Vibration-Induced Rotation of Nano-Wheel: A Molecular Dynamics Study

Duan

Cai

et al. 2018

IJMS

Self Cite

“…Since the discovery of CNTs, the interaction between many other types of atoms or molecules and CNTs has drawn much attention 22 – 27 . For example, CNTs can work as a nanochannel 28 – 32 or even as a substrate to control the self-assembly of black phosphorus nanotubes from nanoribbon 33 – 35 . On the other hand, due to its chemical inertness, argon is usually used as a protective gas in experiments.…”

Section: Introductionmentioning

confidence: 99%

Dynamic behavior of a rotary nanomotor in argon environments

Cai

et al. 2018

Sci Rep

Self Cite

When argon is used as a protecting gas in the fabrication or working environment of a nanodevice, absorption of some argon atoms onto the surface of the device lead to different responses. In this work, the rotation of the rotor in a carbon nanotube (CNT)-based rotary nanomotor in argon environment is investigated. In the rotary nanomotor, two outer CNTs act as the stator and are used to constrain the inner CNT (i.e., the rotor). The rotor is driven to rotate by the stator due to their collision during thermal vibration of their atoms. A stable rotational frequency (SRF) of the rotor occurs when the rotor reaches a dynamic equilibrium state. The value of the SRF decreases exponentially with an increase in the initial argon density. At dynamic equilibrium date, some of the argon atoms rotate synchronously with the rotor when they are absorbed onto either internal or external surface of the rotor. The interaction between the rest of the argon atoms and the rotor is stronger at higher densities of argon, resulting in lower values of the SRF. These principles provide insight for future experimentation and fabrication of such rotary nanomotor.

“…Similar to carbon nanotubes (CNTs) being formed from curved graphene ribbon, a BP nanotube [13,14,15,16,17,18,19,20,21,22,23,24,25,26] may also be obtained by curling a single-layer black phosphorus ribbon and bonding the closing neighbour edges. One of the merits of the new phosphorus allotrope is that the tube has fewer unsaturated atoms, which are essential to the thermal and chemical stabilities of the material [27].…”

Section: Introductionmentioning

confidence: 99%

“…One of the merits of the new phosphorus allotrope is that the tube has fewer unsaturated atoms, which are essential to the thermal and chemical stabilities of the material [27]. Theoretically, the thermal and mechanical properties of the one-dimensional phosphorus nanotube from a single-layered BP have been investigated recently [17,18,19,20,21,22,28,29]. For example, results [19] indicate that the thermal stability of a curved BP ribbon depends on the bending direction of the ribbon.…”

Section: Introductionmentioning

confidence: 99%

Initial Relative Position Influencing Self-Assembly of a Black Phosphorus Ribbon on a CNT

Cao

Wang

et al. 2018

IJMS

Self Cite

It is difficult to obtain a nanotube from phosphorus with a 3sp2 electron configuration by chemical synthesis. However, a physical fabrication approach, such as self-assembly, is worth trying. In an experiment, when using a carbon nanotube (CNT) to trigger self-assembly of a black phosphorus (BP) ribbon, the final configuration of the BP component may be sensitive to the initial relative position of the CNT to the BP ribbon. For instance, using the same CNT with different initial relative positions to the BP ribbon, the BP ribbon may finally become a nanotube, or a scroll, or just wind upon the CNT, or escape from the CNT, etc. In this study, the sensitivity is investigated using molecular dynamics simulations. Numerical results illustrate some essentials for potential fabrication of a BP nanotube from ribbon.