삽입 가스의 부피 팽창을 이용한 탄소나노튜브 진동기 = Carbon Nanotube Oscillator Operated by Thermal Expansion of Encapsulated Gases

다국어 초록 (Multilingual Abstract)

We investigated a carbon nanotube (CNT) oscillator controlled by the thermal gas expansion using classical molecular dynamics simulations. When the temperature rapidly increased, the force on the CNT oscillator induced by the thermal gas expansion rapidly increased and pushed out the CNT oscillator. As the CNT oscillator extruded from the outer nanotube, the suction force on the CNT oscillator increased by the excess van der Waals(vdW) energy. When the CNT oscillator reached at the maximum extrusion point, the CNT oscillator was encapsulated into the outer nanotube by the suction force. Therefore, the CNT oscillator could be oscillated by both the gas expansion and the excess vdW interaction. As the temperature increased, the amplitude of the CNT oscillator increased. At the high temperatures, the CNT oscillator escaped from the outer nanotube, because the force on the CNT oscillator due to the thermal gas expansion was higher than the suction force due to the excess vdW energy. By the appropriate temperature controls, such as the maximum temperature, the heating rate, and the cooling rate, the CNT oscillator could be operated.

참고문헌 (Reference)

1 "Thermal transport measurements of individual multiwalled nanotubes" 87 (87): 215502-, 2001.

2 "There is plenty of room at the bottom There is plenty of room at the bottom" 23 1 : 22 60-, 19601992.

3 "Pullout forces and friction in multiwall carbon nanotubes" 69 (69): 233408-, 2004.

4 "Prediction of fullerene packing in C60 and C70 crystals" 351 (351): 464-, 1991.

5 "Position of K atoms in doped single-walled carbon nanotube crystals" 80 (80): 5556-, 1998.

6 "Nanosystems: Molecular Machinery, Manufacturing, and Computation" na (na): 1-, 1992.

7 "Multiwalled carbon nanotubes as gigahertz oscillators" 88 (88): 045503-, 2002.

8 "Molecular-dynamics simulations of carbon nanotubes as gigahertz oscillators" 90 (90): 055504-, 2003.

9 "Molecular dynamics simulations of the filling and decorating of carbon nano- tubules" 10 (10): 273-, 1999.

10 "Low-friction nanoscale linear bearing realized from multiwall carbon nanotubes" 289 (289): 602-, 2000.

11 "Interlayer sliding force of individual multiwall carbon nanotubes" 42 (42): 4830-, 2003.

12 "Interatomic potentials for multicomponent systems" 39 : 5566-, 1989.

13 "Gigahertz nanomechanical oscillators based on carbon nanotubes" 15 (15): 184-, 2004.

14 "Gigahertz actuator of multiwall carbon nanotube encapsulating metallic ions" 96 : 3900-, 2004.

15 "Excess van der Waals interaction energy of a multiwalled carbon nanotube with an extruded core and the induced core oscillation" 65 (65): 245409-, 2002.

16 "Energy dissipation mechanisms in carbon nanotube oscillators" 91 (91): 175504-, 2003.

17 "Energy dissipation in gigahertz oscillators from multiwalled carbon nanotubes" 91 (91): 125501-, 2003.

18 "Empirical potential for hydrocarbons for use in simulating the chemical vapor deposition of diamond films" 42 (42): 9458-, 1990.

19 "Empirical interatomic potential silicon with improved elastic properties" 38 (38): 9902-, 1988.

20 "Electronic structure of single-walled carbon nanotubes encapsulating potassium" 67 no. 11 : 115418-, 2003.

21 "Electron-phonon interactions and superconductivity in K3C60" 48 (48): 13959-, 1993.

22 "Coupled defect-size effects on interlayer friction in multiwalled carbon nanotubes" 72 (72): 075409-, 2005.

23 "Conductivity enhancement in single-walled carbon nanotube bundles doped with K and Br" 388 (388): 255-, 1997.