Optimizing the design of nanostructures for improved thermal conduction within confined spaces

Jianlong Kou, Huiguo Qian, Hangjun Lu, Yang Liu, Yousheng Xu, Fengmin Wu, Jintu Fan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)


Maintaining constant temperature is of particular importance to the normal operation of electronic devices. Aiming at the question, this paper proposes an optimum design of nanostructures made of high thermal conductive nanomaterials to provide outstanding heat dissipation from the confined interior (possibly nanosized) to the microspaces of electronic devices. The design incorporates a carbon nanocone for conducting heat from the interior to the exterior of a miniature electronic device, with the optimum diameter, D0,of the nanocone satisfying the relationship: D02(x) ∝ x1/2where x is the position along the length direction of the carbon nanocone. Branched structure made of single-walled carbon nanotubes (CNTs) are shown to be particularly suitable for the purpose. It was found that the total thermal resistance of a branched structure reaches a minimum when the diameter ratio, β* satisfies the relationship: β*= γ-0.25bN-1/k*, where γ is ratio of length, b = 0.3 to approximately 0.4 on the singlewalled CNTs, b = 0.6 to approximately 0.8 on the multiwalled CNTs, k* = 2 and N is the bifurcation number (N= 2, 3, 4...). The findings of this research provide a blueprint in designing miniaturized electronic devices with outstanding heat dissipation.
Original languageEnglish
Article number422
Pages (from-to)1-8
Number of pages8
JournalNanoscale Research Letters
Publication statusPublished - 1 Dec 2011

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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