Ultrafast cooling by covalently bonded graphene-carbon nanotube hybrid immersed in water

Jie Chen, Jens Honore Walther, Petros Koumoutsakos

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The increasing power density and the decreasing dimensions of transistors present severe thermal challenges to the design of modern microprocessors. Furthermore, new technologies such as three-dimensional chip-stack architectures require novel cooling solutions for their thermal management. Here, we demonstrate, through transient heat-dissipation simulations, that a covalently bonded graphene-carbon nanotube (G-CNT) hybrid immersed in water is a promising solution for the ultrafast cooling of such high-temperature and high heat-flux surfaces. The G-CNT hybrid offers a unique platform to integrate the superior axial heat transfer capability of individual CNTs via their parallel arrangement. The immersion of the G-CNT in water enables an additional heat dissipation path via the solid-liquid interaction, allowing for the sustainable cooling of the hot surface under a constant power input of up to 10 000 W cm-2.
    Original languageEnglish
    JournalNanotechnology
    Volume27
    Issue number46
    Pages (from-to)465705
    Number of pages8
    ISSN0957-4484
    DOIs
    Publication statusPublished - 2016

    Keywords

    • Graphene
    • Carbon nanotube
    • Covalent bonding
    • Liquid cooling
    • Hotspot removal
    • Molecular dynamics

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