封装铜纳米线的碳米纳管热输运温度影响机制探究

Temperature Effect on Interfacial Heat Transfer ehancement Between CNTs Loaded With Copper Nanwoires

碳纳米管的独特中空结构使其能够通过内部封装材料形成核壳结构,制备各种可调控功能性纳米器件。受限于纳米特征尺寸,有限的研究报道导致微观热输运机制尚不明晰,导致碳纳米管核壳结构的材料设计缺乏明确的理论支持。其中,管内封装金属纳米线的制备、调控和应用已经得到初步探索,作为一种典型的碳管核壳结构,其热输运特性及机制具有较强的研究价值。因此,本工作以铜金属为典型,探究碳管内封装铜纳米线结构在不同的加热温度下复合结构的热导率变化,并通过管内纳米线轨迹、温度分布、声子态密度和重叠能等进行热输运机制分析。

The unique hollow structure of carbon nanotube(CNT)makes it possible to form as a core-shell structure through internal packaging materials to prepare various tunable functional nanodevices.Due to its nanometer feature size,limited research reports lead to unclear microscopic heat transfer mechanism,resulting in a lack of clear theoretical support for material design about CNT core-shell materials.Among them,the preparation,regulation and application of metal nanowires encapsulated in CNT have been initially explored.As a typical CNT core-shell structure,its heat transfer characteristics and mechanism have strong research value.Therefore,this work takes Cu as a typical example to explore the heat transfer difference of the composite structure of Cu nanowire encapsulated in CNT at different temperatures.And the heat transfer is analyzed by the nanowire trajectory,temperature distribution,vibration density of states and overlap energy.