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A tribological study of double-walled and triple-walled carbon nanotube oscillators

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : A tribological study of double-walled and triple-walled carbon nanotube oscillators
นักวิจัย : Ma, Chi Chiu , Zhao, Yang , Yam, Chi Yung , Chen, Guan Hua , Jiang, Qing
คำค้น : DRNTU::Engineering::Materials::Nanostructured materials.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2548
อ้างอิง : Ma, C. C., Zhao, Y., Yam, C. Y., Chen, G. H., & Jiang, Q. (2005). A tribological study of double-walled and triple-walled carbon nanotube oscillators. Nanotechnology, 16(8). , http://hdl.handle.net/10220/6778 , http://dx.doi.org/10.1088/0957-4484/16/8/046
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Nanotechnology
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

We reported in a previous study that energy transfer from the orderly intertube translational oscillation to intratube vibrational modes for an isolated system of two coaxial carbon nanotubes at low temperatures takes place primarily via two distinct types of collective motion of the carbon nanotubes, i.e., off-axial rocking motion of the inner tube and radial wavy motion of the outer tube, and that these types of motion may or may not occur for such a system, depending upon the amount of the initial extrusion of the inner tube out of the outer tube. Our present study, using micro-canonical molecular dynamics (MD), indicates the existence of an energy threshold, largely independent of system sizes and configurations, for a double-walled nano-oscillator to deviate from the intertube translational oscillation and thus to encounter significant intertube friction. The frictional forces associated with several distinct dissipative mechanisms are all found to exhibit no proportional dependence upon the normal force between the two surfaces in relative sliding, contrary to the conventional understanding resulting from tribological studies of macroscopic systems. Furthermore, simulation has been performed at different initial temperatures, revealing a strong temperature dependence of friction in the early phase of oscillation. Finally, our studies of three-walled nano-oscillators show that an initial extrusion of the middle tube can cause inner-tube off-axial instabilities, leading to strong frictional effects.

บรรณานุกรม :
Ma, Chi Chiu , Zhao, Yang , Yam, Chi Yung , Chen, Guan Hua , Jiang, Qing . (2548). A tribological study of double-walled and triple-walled carbon nanotube oscillators.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Ma, Chi Chiu , Zhao, Yang , Yam, Chi Yung , Chen, Guan Hua , Jiang, Qing . 2548. "A tribological study of double-walled and triple-walled carbon nanotube oscillators".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Ma, Chi Chiu , Zhao, Yang , Yam, Chi Yung , Chen, Guan Hua , Jiang, Qing . "A tribological study of double-walled and triple-walled carbon nanotube oscillators."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2548. Print.
Ma, Chi Chiu , Zhao, Yang , Yam, Chi Yung , Chen, Guan Hua , Jiang, Qing . A tribological study of double-walled and triple-walled carbon nanotube oscillators. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2548.