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Tunable analog thermal material

Author

Listed:
  • Guoqiang Xu

    (National University of Singapore)

  • Kaichen Dong

    (University of California, Berkeley
    Materials Sciences Division, Lawrence Berkeley National Laboratory)

  • Ying Li

    (National University of Singapore
    Zhejiang University
    Zhejiang University)

  • Huagen Li

    (National University of Singapore)

  • Kaipeng Liu

    (National University of Singapore
    State Key Laboratory of Robotics and System, Harbin Institute of Technology)

  • Longqiu Li

    (State Key Laboratory of Robotics and System, Harbin Institute of Technology)

  • Junqiao Wu

    (University of California, Berkeley
    Materials Sciences Division, Lawrence Berkeley National Laboratory)

  • Cheng-Wei Qiu

    (National University of Singapore)

Abstract

Naturally-occurring thermal materials usually possess specific thermal conductivity (κ), forming a digital set of κ values. Emerging thermal metamaterials have been deployed to realize effective thermal conductivities unattainable in natural materials. However, the effective thermal conductivities of such mixing-based thermal metamaterials are still in digital fashion, i.e., the effective conductivity remains discrete and static. Here, we report an analog thermal material whose effective conductivity can be in-situ tuned from near-zero to near-infinity κ. The proof-of-concept scheme consists of a spinning core made of uncured polydimethylsiloxane (PDMS) and fixed bilayer rings made of silicone grease and steel. Thanks to the spinning PDMS and its induced convective effects, we can mold the heat flow robustly with continuously changing and anisotropic κ. Our work enables a single functional thermal material to meet the challenging demands of flexible thermal manipulation. It also provides platforms to investigate heat transfer in systems with moving components.

Suggested Citation

  • Guoqiang Xu & Kaichen Dong & Ying Li & Huagen Li & Kaipeng Liu & Longqiu Li & Junqiao Wu & Cheng-Wei Qiu, 2020. "Tunable analog thermal material," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-19909-0
    DOI: 10.1038/s41467-020-19909-0
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    Cited by:

    1. Guoqiang Xu & Xue Zhou & Shuihua Yang & Jing Wu & Cheng-Wei Qiu, 2023. "Observation of bulk quadrupole in topological heat transport," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Ying Li & Minghong Qi & Jiaxin Li & Pei-Chao Cao & Dong Wang & Xue-Feng Zhu & Cheng-Wei Qiu & Hongsheng Chen, 2022. "Heat transfer control using a thermal analogue of coherent perfect absorption," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    3. Huagen Li & Dong Wang & Guoqiang Xu & Kaipeng Liu & Tan Zhang & Jiaxin Li & Guangming Tao & Shuihua Yang & Yanghua Lu & Run Hu & Shisheng Lin & Ying Li & Cheng-Wei Qiu, 2024. "Twisted moiré conductive thermal metasurface," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    4. Wei Sha & Mi Xiao & Jinhao Zhang & Xuecheng Ren & Zhan Zhu & Yan Zhang & Guoqiang Xu & Huagen Li & Xiliang Liu & Xia Chen & Liang Gao & Cheng-Wei Qiu & Run Hu, 2021. "Robustly printable freeform thermal metamaterials," Nature Communications, Nature, vol. 12(1), pages 1-8, December.

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