Excellent heat transfer enhancement of CNT-metal interface by loading carbyne and metal nanowire into CNT

•Calculation of thermal resistance of CNT-metal based on combination of MD and TTM.•Supplements provide a better understand of thermal control of CNT-metal materials.•Exploration of the carbyne and metal nanowire effect on heat transfer of CNT-metal.•Provide a new research direction for thermal performance strengthen of CNT materials. The carbon nanotube (CNT)-metal structure widely occurs in the CNT application, especially for the heat dissipation of electronic devices of various scales. However, the research on mechanism of interfacial heat transfer between CNT-metal lacks an accurate and complete research system, and the enhancement strategy of interfacial heat transfer lacks a systematic method. Therefore, in this work, CNT is in the end contact with metal substrate with four sizes of CNT and three types of metal. The interfacial thermal resistance of CNT-metal is calculated by the combination of Two Temperature Model and Molecular Dynamics, and its mechanism is analyzed by atomic vibration density of state, vibration overlap energy, interaction energy. In addition, carbyne and metal nanowire are loaded in the CNT to improve heat transfer and the variation of heat transfer as a function of the loading material length, structure size, type, movement and temperature are analyzed to reveal the enhancement strategy. [Display omitted]