Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5607
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Title: Optimizing the design of nanostructures for improved thermal conduction within confined spaces
Authors: Kou, J
Qian, H
Lu, H
Liu, Y 
Xu, Y
Wu, F
Fan, J 
Issue Date: 14-Jun-2011
Source: Nanoscale research letters, 14 June 2011, 6:422
Abstract: 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 micro-spaces 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) ∝ x[sup 1/2] where 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[sup -0.25b]N[sup -1/k*], where γ is ratio of length, b = 0.3 to approximately 0.4 on the single-walled 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.
PACS numbers: 44.10.+i, 44.05.+e, 66.70.-f, 61.48.De
Publisher: Springer
Journal: Nanoscale research letters 
ISSN: 1556-276X (online)
DOI: 10.1186/1556-276X-6-422
Rights: © 2011 Kou et al; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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