Abstract
A novel transient technique is developed to measure the thermal diffusivity of one-dimensional microscale wires. In this technique, a pulsed nanosecond laser is used to quickly heat the wire. After laser heating, the wire temperature decays slowly. Such temperature decay is sensed and used to determine the thermal diffusivity of the wire. A 25.4 μm thin Pt wire is characterized to verify this technique. The thermal diffusivity of multi-wall carbon nanotube bundles is measured. Based on the measurement result and the inside structure, the thermal diffusivity of individual carbon nanotubes is estimated.
| Original language | English |
|---|---|
| Pages (from-to) | 71-76 |
| Number of pages | 6 |
| Journal | Functional Materials Letters |
| Volume | 1 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jun 2008 |
Funding
Support for this work from the start-up fund of Iowa State University is gratefully acknowledged. The authors are grateful to Biqing Sheng, Dr. Zhaoyan Zhang, Kejun Yi, and Dr. Yongfeng Lu at the University of Nebraska-Lincoln for their help with using their high-power nanosecond pulsed lasers.
| Funders | Funder number |
|---|---|
| Iowa State University |
Keywords
- Thermal diffusivity
- carbon nanotube
- characterization
- nanosecond laser