THE EFFECT OF TEMPERATURE ON THE ELECTRICAL RESISTANCE OF CARBON NANOTUBES
Temperatures from 20 C (room) down to -196 C (liquid nitrogen) were applied to a commercially supplied multi-wall carbon nanotube sample—from Helix Material Solutions, Inc. A plastic PLA 3-D printed sample holder was used in a 4-wire resistance configuration, along with a platinum resistance temperature detector from Omega Engineering. A custom made LabView virtual instrument collected data at a rate of 2 sets of readings per second. After analyzing the data with Excel software, the resistance of the sample generally increased from around 95 Ω, at room temperature, to around 180 Ω, at -196 C. Upon warming, the resistance varied slightly, but ultimately decreased down to around 140 Ω, at room temperature. Hysteresis was observed. The voltage versus current dependence—at room temperature—was fit to a quadratic function; the resistance at I = 0 was found to be (133.20 ± 0.01) Ω. Work supported by the Georgia Space Grant Consortium-NASA.
Watkins, Hannah and DeMayo, Ben
"THE EFFECT OF TEMPERATURE ON THE ELECTRICAL RESISTANCE OF CARBON NANOTUBES,"
Georgia Journal of Science, Vol. 75, No. 1, Article 99.
Available at: http://digitalcommons.gaacademy.org/gjs/vol75/iss1/99
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