グラフェンの層に依存した熱伝導性は,熱管理アプリケーションに向けて
Jiawei Li1, Jie Zheng2, Linxin Zhai3
1State Key Lab of New Ceramic Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
ACS applied materials & interfaces
|February 16, 2026
まとめ
グラフェンはグラフェン.
科学分野:
- 材料科学 材料科学とは
- ナノテクノロジー ナノテクノロジー
- 凝縮物質物理学 凝縮物質物理学
背景:
- グラフェンは顕著な熱特性を持ち,熱管理に有望である.
- 層に依存する熱伝導性は,グラフェン装置の最適化に不可欠です.
- 層間の散乱は,グラフェン層が増加するにつれて熱伝導性に影響を及ぼします.
研究 の 目的:
- グラフェンの層に依存する熱伝導性を調査するために.
- グラフェン層と散熱の関係を理解するために.
- 熱管理アプリケーションに関する洞察を提供するために.
主な方法:
- 熱伝導度測定のためにナノスケールの熱橋法を使用しました.
- 異なる数の層を持つグラフェンのサンプルをテストした.
- 評価された効果的な散熱能力.
主要な成果:
- 単層グラフェンは高熱伝導性 (最大3100W/mK) を示した.
- 熱伝導性は層数が増加するにつれて減少し,4層を超えて安定した.
- 2層から6層の間に非単調な依存性が観察され,これは二重経路輸送モデルによって説明される.
結論:
- グラフェンの熱伝導性は,競合する要因のために層に依存しています.
- フォノンと電子輸送は,多層グラフェンの熱伝送に寄与する.
- 発見は,グラフェンベースの電子機器の熱設計を導く.
関連する概念動画
Conduction, Convection and Radiation: Problem Solving
2.5K
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...
2.5K
Mechanism of heat transfer
2.0K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
2.0K
Mechanisms of Heat Transfer
1.8K
Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
1.8K
Mechanisms of Heat Transfer II
4.6K
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...
4.6K
Mechanisms of Heat Transfer I
6.3K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
6.3K


