Related Experiment Video
Updated: Oct 26, 2025
05:20
Characterization of Thermal Transport in One-dimensional Solid Materials
Published on: January 26, 2014
17.8K
Backscattering limit of nanoscale heat conduction
1School of Chemical & Biomolecular Engineering, School of Physics, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA 30332, United States of America.
Summary
Researchers have discovered a new lower limit for thermal conductivity in nanoscale materials. Surface backscattering significantly reduces thermal energy transport, enabling much lower conductivities than previously possible.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Achieving extremely low thermal conductivity is crucial for thermal energy conversion and storage.
- Classical approaches have limitations in minimizing thermal transport in engineered materials.
Purpose of the Study:
- To introduce a new theoretical lower limit for thermal conductivity in nanoscale materials.
- To explore the impact of phonon backscattering on thermal transport.
Main Methods:
- Formulation of a theoretical model for thermal phonon transport.
- Incorporation of surface backscattering effects into the model.
Main Results:
- A new lower limit for thermal conductivity in nanoscale engineered materials has been established.
- Surface backscattering was shown to significantly reduce thermal conductivity, by orders of magnitude compared to classical methods.
Conclusions:
- Surface backscattering offers a pathway to achieve unprecedentedly low thermal conductivities at the nanoscale.
- This finding has significant implications for the design of advanced thermal energy materials.
Related Concept Videos
01:20Conduction, Convection and Radiation: Problem Solving
1.6K
There are three methods by which heat transfer can take place: conduction, convection, and radiation. Each method has unique and interesting characteristics, but all three have two things in common: they transfer heat solely because of a temperature difference; and the greater the temperature difference, the faster the heat transfer.
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
1.6K
01:20Mechanisms of Heat Transfer II
3.7K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
3.7K