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Preparation of Liquid-exfoliated Transition Metal Dichalcogenide Nanosheets with Controlled Size and Thickness: A State of the Art Protocol
Published on: December 20, 2016
Anisotropic Thermal Conduction in Transition Metal Dichalcogenide Nanocomposites with Rough Interfaces
Iorwerth O Thomas1, Gyaneshwar P Srivastava2
1School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK. i.o.thomas2@exeter.ac.uk.
We developed a theory for thermal conduction in nanocomposites, accounting for interface roughness. Surface roughness significantly impacts thermal conductivity in smaller inserts, even at low concentrations.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Transition metal dichalcogenides (TMDs) are crucial for advanced electronics.
- Understanding thermal transport in nanocomposites with rough interfaces is vital for device performance.
- Anisotropic conductivities and interface scattering effects are key challenges.
Purpose of the Study:
- To develop a comprehensive theory for thermal conduction in TMD nanocomposites.
- To incorporate anisotropic properties of host, insert, and interface regions.
- To quantify the impact of interface roughness on thermal conductivity.
Main Methods:
- Calculated host and insert conductivities using a semi ab-initio method.
- Incorporated phonon interface scattering and thermal boundary resistance.
- Employed an extended modified effective medium approach for composite conductivity.
Main Results:
- The theory accounts for anisotropic conductivities and interface roughness.
- Specular scattering effects due to roughness are pronounced for inserts < 100 nm.
- Significant impact observed even at low volume fractions (0.05).
Conclusions:
- Interface roughness plays a critical role in thermal transport of TMD nanocomposites.
- Nanocomposite design must consider surface morphology for effective thermal management.
- The developed theory provides a framework for predicting thermal conductivity in such systems.
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