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Preparation and Evaluation of Hybrid Composites of Chemical Fuel and Multi-walled Carbon Nanotubes in the Study of Thermopower Waves
Published on: April 10, 2015
Remote Joule heating by a carbon nanotube
Kamal H Baloch1, Norvik Voskanian, Merijntje Bronsgeest
1Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20740, USA.
Nature Nanotechnology
|April 10, 2012
Summary
Researchers discovered remote Joule heating in carbon nanotubes, where electrical power heats a substrate instead of the nanotube. This finding could improve thermal management in electronic devices by dissipating heat away from sensitive components.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Minimizing Joule heating is crucial for electronic device design.
- Traditional Joule heating models assume local heat generation within conductors.
- Recent predictions suggest remote heating via electron-vibrational coupling in nanomaterials.
Purpose of the Study:
- To experimentally investigate remote Joule heating in carbon nanotubes.
- To quantify heat dissipation into a neighboring substrate.
- To explore implications for thermal management in electronics.
Main Methods:
- Utilized in situ electron thermal microscopy.
- Employed a single multiwalled carbon nanotube on a silicon nitride substrate.
- Measured electrical power input and heat distribution.
Main Results:
- Confirmed remote Joule heating of the silicon nitride substrate by the carbon nanotube.
- Determined that at least 84% of electrical power dissipated into the substrate.
- Observed heat dissipation primarily outside the nanotube itself.
Conclusions:
- Demonstrated significant remote Joule heating, challenging conventional models.
- The phenomenon resembles induction or microwave dielectric heating.
- Remote energy dissipation offers potential for advanced thermal management strategies.
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