Carbon Nanocoils for Thermal Sensors and Applications
Date Issued
2010
Date
2010
Author(s)
Huang, Jian-Lin
Abstract
We use carbon nanocoils as sensing element to design a new thermal sensor device. There are two design of carbon nanocoils thermal sensor. One was using the bundle of carbon nanocoils as thermal sensing element, other was using aligned carbon nanocoils between metal electrode which manipulated by dielectrophoresis. We can stabilize contact resistance by thermal annealing. After fabrication, the sensor sent into the furnace to measure the relationship between temperature and resistance and calculate Temperature coefficient of resistance (TCR) of thermal sensor. Finally, we using TCR value to estimate the temperature change of carbon nanocoil impinged by electromagnetic wave.
It was found that the TCR values of the carbon nanocoils thermal sensors distributed in the -0.12% / ℃ ~ 1.25% / ℃ depends on each sensor design, and which have better sensitivity compare to using carbon nanotube as sensing element. Temperature change of carbon nannocoils impinged by electromagnetic wave are below 1 ℃.
Subjects
Carbon nanocoils
thermal sensor
dielectrophoresis
TCR
electromagnetic wave absorption
Type
thesis
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