A strategy for 2D MXenes as thermal management materials by laser shock nanoshaping
A strategy for 2D MXenes as thermal management materials by laser shock nanoshaping
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DOI：
10.1088/2515-7639/acef96
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发表时间：
2023-08
期刊：
影响因子：
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通讯作者：
Danilo de Camargo Branco;G. Cheng
中科院分区：
文献类型：
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作者：
Danilo de Camargo Branco;G. Cheng
二维（2D）碳化钛（Tin+1Cn）属于MXene家族，碳和钛以片状结构交替，是纳米电子应用的新兴选择。在这项研究中，纳米成形的2D碳化钛的可调热管理材料的可行性进行了研究。2D碳化钛在纳米尺度上表现出高度的可成形性，并且作为纳米电子元件中的热管理系统具有高效率。使用分子动力学模拟研究了各种MXene 2D薄片的热导率。已经预测了在各种纳米模具图案上纳米成形之后的2D MXene的稳健的热管理行为，这将促进用于电子纳米元件中的热管理的基于MXene的超材料的开发。的尺寸依赖性分析表明，MXene的热导率是高度影响的薄片尺寸，导致实验值的变化，由于比例因子。我们的模型表明，Ti2C在支撑和悬浮条件下对应变更敏感，而较厚的MXene不会受到应变的影响。当被支撑时，由于Z声子模的抑制，所有模拟的MXene的热导率显著降低。弯曲应变也表现出散射声子模式在MXene热导率的影响。这使得MXenes成为热场管理的一个有吸引力的选择。
The two-dimensional (2D) titanium carbides ( Tin+1Cn ) belong to the MXene family, with carbon and titanium alternating in a flake structure, and are emerging options for nanoelectronics applications. In this study, the feasibility of nanoshaping of 2D titanium carbides for tunable thermal management materials was investigated. 2D titanium carbides demonstrate high degrees of formability on nanoscale and efficiency as thermal management systems in nanoelectronics components. The thermal conductivity of various MXene 2D flakes was studied using molecular dynamics simulations. A robust thermal management behavior has been predicted for 2D MXenes after nanoshaping on various nanomold patterns, which will facilitate the development of MXene-based metamaterials for thermal management in electric nanocomponents. The size dependence analysis shows that the MXenes thermal conductivity is highly influenced by the flake size leading to a variation in experimental values due to scale factors. Our model showed that Ti2C is more sensible to strain at both supported and suspended conditions, while the thicker MXenes are not too influenced by strain. When supported, the thermal conductivities of all simulated MXenes considerably decrease due to Z phonon modes suppression. Bending strain also showed an effect in the MXenes thermal conductivity by scattering phonon modes. This makes MXenes an attractive option for the management of thermal fields.