Related Experiment Video
Updated: Nov 19, 2025
10:40
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
7.8K
Strategies for Manipulating Phonon Transport in Solids
Hoon Kim1, Gimin Park1, Sungjin Park1
1School of Mechanical Engineering, Yonsei University, Seoul 03722, Korea.
ACS Nano
|January 28, 2021
Summary
This review explores methods to control heat flow in solids by altering thermal conductivity. Strategies modify specific heat, phonon group velocity, and mean free path for better thermal management.
Area of Science:
- Solid-state physics
- Materials science
- Thermal transport
Background:
- Phonon transport governs thermal conductivity in solids.
- Controlling thermal properties is crucial for advanced materials and devices.
Purpose of the Study:
- To review recent strategies for manipulating phonon transport in solids.
- To categorize techniques based on their effect on thermal conductivity and conductance.
Main Methods:
- Summarizing methods to alter specific heat (large unit cell, liquid-like conduction).
- Detailing techniques for controlling phonon group velocity (rattlers, mini-bandgaps, confinement).
- Listing strategies for restricting phonon mean free path (nanoparticles, alloying, disorder).
Main Results:
- Various approaches effectively modify thermal conductivity by targeting its fundamental components.
- Phonon thermal conductance can be tuned via transmission probability and density of states manipulation.
- Techniques like phonon filtering and waveguiding offer novel ways to control heat flow.
Conclusions:
- A comprehensive overview of phonon manipulation strategies is presented.
- The findings provide insights for designing materials with tailored thermal properties.
- This review aids researchers in advancing the field of phonon transport in solids.
Related Concept Videos
02:54Molecular and Ionic Solids
19.2K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
19.2K
00:51Speed of Sound in Solids and Liquids
3.6K
Most solids and liquids are incompressible—their densities remain constant throughout. In the presence of an external force, the molecules tend to restore to their original positions, which is only possible because the constituents interact. The interactions help the constituents pass on information about external disturbances, like sound waves. Therefore, sound waves travel faster through these media. Compared to solids, the constituents in a liquid are less tightly bound. Thus, sound...
3.6K
02:35Band Theory
16.5K
When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
16.5K
02:22Structures of Solids
16.8K
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
16.8K
01:01Energy Bands in Solids
1.5K
Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
1.5K
01:17Theory of Metallic Conduction
1.6K
The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
1.6K