在MXenes中加速格子导热计算:一种机器学习的力场方法
Thanasee Thanasarnsurapong1, Sourav Kanti Jana1, Panyalak Detrattanawichai2
1Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.
机器学习力场 (MLFF) 显著加快了Ti2C和Ti3C2 MXenes的晶格导热率预测. 表面功能化降低了导热率,证明了MLFF.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 计算材料科学科学 计算材料科学
背景情况:
- 网格的导热性对于材料性能至关重要.
- 传统的方法,如语音波尔兹曼运输方程 (PBTE) 与密度函数理论 (DFT) 的计算成本昂贵.
- MXenes,特别是Ti2C和Ti3C2,是有前途的2D材料,具有可调节的热性能.
研究的目的:
- 预测Ti2C和Ti3C2MXenes及其功能化变体的晶格导热率.
- 为了评估基于DFT的飞行机器学习力场 (MLFF) 对于热传输计算的有效性.
- 为了研究表面功能化 (O,F,OH) 对MXenes的导热率的影响.
主要方法:
- 使用基于DFT的机器学习实力场 (MLFF) 进行计算.
- 预测原始Ti2C和Ti3C2MXenes的晶格导热率.
- 研究了氧 (O), (F) 和 (OH) 表面终端对导热性的影响.
主要成果:
- 预测的晶格导热率为Ti2C的73.10 W m-1 K-1和Ti3C的101.15 W m-1 K-1.
- 在引入表面功能组后,观察到格子导热率的显著降低.
- MLFF的预测比传统的DFT计算快了几十到几千倍.
结论:
- MLFF为传统的DFT方法提供了一个高效的替代方案,用于计算MXenes中的晶格导热率.
- 表面功能化是一种有效的策略,可以调整2D MXenes的热特性.
- MLFF显示了加速探索和优化先进材料中的热传输的巨大潜力.
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