Temperature Dependent Resistance of Multi-Wall Carbon Nanotube

Abstract

This study investigates electron transport properties of a Joule heated multi-wall carbon nanotube at temperatures as high as about 2100 K. Results show that the electrical resistance is temperature-dependent. The temperature dependence of the resistance is inferred to originate from the temperature-dependent intrashell resistance and intershell conductance. The resistance variation was analyzed using a resistive transmission line model. Results well reproduced those obtained using a double shell conduction model where the electrons transport in the outermost shell and the second inner shell. #

Refilling of carbon nanotube cartridges for 3D nanomanufacturing

“…According to the classical equation of heat conduction, for a simple two-terminal connection, the temperature distribution on the CNT bridge has a parabolic shape with a maximum located near the middle of the CNT bridge. 18,24 In this situation, a strong temperature gradient directed toward the electrode pushes metal particles or melts in the same direction. This may prevent metal loading into the CNT and may lead to the destruction of the host CNT.…”

“…This conclusion differs from that of Zou et al, who determined electromigration to be the primary mechanism of loading; 17 however, this discrepancy can be attributed to principal differences between the proposed experimental setups; in their report, the host CNT was connected directly to the gold electrode, causing the temperature to be the highest in the central part of the host CNT. 18,24 Consequently, the thermophoresis force was directed toward the direction opposite to that of gold loading.…”

“…A bias voltage was applied between the electrodes to pass a current through the MWCNT using a source meter (Keithley 2410). The central part of the MWCNT was heated locally to the sublimation temperature of 3200 K 18 due to Joule heat, 24 and several outer layers peeled off step-by-step due to the sublimation of carbon atoms. 25 The peeling was stopped when the outer diameter of the remaining layers reached the desired value (i.e., the value consistent with the diameter of the gold nanowire we wanted to load into the CNT cartridge).…”

In situ TEM study on structural and electric conduction properties of a multiwall carbon nanotube connected to a Mo electrode

“…Possible causes of the disagreement may be different experiment methods, sample‐dependent lattice defects, and impurities in the MWNTs used. There can be another factor in these disagreements, for example, thermal activation of inter‐shell conduction . Theoretical studies on inter‐shell conductance in MWNTs have been carried out in several groups.…”