کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1861479 | 1530619 | 2010 | 6 صفحه PDF | دانلود رایگان |
Thermal conductivity of single-wall carbon nanotubes with linear, “Y” and “X” hetero-junctions is studied using nonequilibrium molecular dynamics method. The three types of junctions with almost equal number of point defects show a similar decrease in thermal conductivity compared to that of the pristine carbon nanotube. Thermal conductivity of the nanotubes with different number of point defects is also calculated for a qualitative comparison. The thermal conductivity decreases with the defect number increasing. When the defects form an interface, they can cause a larger decrease in the thermal conductivity of CNT than when they are distributed dispersedly. The number of defects contained in the nanojunction determines the thermal conductivity to a great extent more than the geometrical forms of the nanojunctions. Phonon spectra of these junctions are also analyzed to explore the mechanism of degradation in thermal conductivity of these junctions.
Journal: Physics Letters A - Volume 374, Issues 17–18, 12 April 2010, Pages 1860–1865