Covalently Bonded Graphene-Carbon Nanotube Hybrid for High-Performance Thermal Interfaces
Covalently Bonded Graphene-Carbon Nanotube Hybrid for High-Performance Thermal Interfaces
复制标题
DOI：
10.1002/adfm.201501593
复制
发表时间：
2015-12-22
影响因子：
19
通讯作者：
Koumoutsakos, Petros
中科院分区：
文献类型：
--
作者：
Chen, Jie;Walther, Jens H.;Koumoutsakos, Petros
石墨烯和碳纳米管（CNT）的显着的热性能已经成为集成电路热管理的深入研究的主题。然而，碳纳米管的小接触面积和石墨烯的大的各向异性热传导阻碍了它们作为有效的热界面材料（TIM）的应用。在这里，提出了共价键合的石墨烯-CNT（G-CNT）混合物，其通过它们的平行布置使单个CNT的轴向传热能力倍增，而同时它提供了大的接触面积用于有效的热提取。通过计算机模拟，证明了G-CNT在c轴传热方面优于少层石墨烯超过2个数量级，而其热阻比最先进的TIM低3个数量级。我们表明，可以通过将其浸入液体中来去除G-CNT中的热量。G-CNT的传热特性表明，它有可能彻底改变高性能TIM的设计。
The remarkable thermal properties of graphene and carbon nanotubes (CNTs) have been the subject of intensive investigations for the thermal management of integrated circuits. However, the small contact area of CNTs and the large anisotropic heat conduction of graphene have hindered their applications as effective thermal interface materials (TIMs). Here, a covalently bonded graphene-CNT (G-CNT) hybrid is presented that multiplies the axial heat transfer capability of individual CNTs through their parallel arrangement, while at the same time it provides a large contact area for efficient heat extraction. Through computer simulations, it is demonstrated that the G-CNT outperforms few-layer graphene by more than 2 orders of magnitude for the c-axis heat transfer, while its thermal resistance is 3 orders of magnitude lower than the state-of-the-art TIMs. We show that heat can be removed from the G-CNT by immersing it in a liquid. The heat transfer characteristics of G-CNT suggest that it has the potential to revolutionize the design of high-performance TIMs.