Flexible heat-spreading and air-cooling films using nickel-electroplated nanotextured fibers

Taegun Kim, Seongpil An, Chanwoo Park, Jeehoon Choi, Alexander L. Yarin, Sam S. Yoon

Research output: Contribution to journalArticlepeer-review

Abstract

Malfunctioning caused by hotspots in high-power and high-density microelectronics has been a major problem, particularly for miniaturized advanced portable electronic devices. The use of efficient heat spreaders or cooling films is a viable solution for mitigating the hotspot concern in high-power density electronic devices. In this study, we fabricated thin, flexible, wearable, heat-spreading cooling films decorated with highly nanotextured Ni microfibers. The Ni-electroplated microfibers could quickly spread heat over a solid medium and dissipate heat to the atmosphere via convective cooling. In the present parametric studies, the Ni electroplating time varied from 45 to 60 and 90 min. The optimal condition, which yielded the lowest thermal resistance and the highest heat transfer coefficient, was identified. The Ni microfibers were characterized using scanning electron microscopy, X-ray diffraction, and transmission electron microscopy analyses.

Original languageEnglish
Article number115951
JournalChemical Engineering Science
Volume227
DOIs
Publication statusPublished - 2020 Dec 14

Keywords

  • Electroplating
  • Electrospinning
  • Heat spreading
  • Natural convection for air cooling
  • Nickel microfibers

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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