Optimizing the design of nanostructures for improved thermal conduction within confined spaces
Open Access
- 14 June 2011
- journal article
- Published by Springer Science and Business Media LLC in Nanoscale Research Letters
- Vol. 6 (1), 422
- https://doi.org/10.1186/1556-276x-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, D 0, of the nanocone satisfying the relationship: D 0 2 (x) ∝ x 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 -0.25b N -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.DeKeywords
This publication has 34 references indexed in Scilit:
- Carbon nanocones: wall structure and morphologyScience and Technology of Advanced Materials, 2009
- Water-mediated signal multiplication with Y-shaped carbon nanotubesProceedings of the National Academy of Sciences of the United States of America, 2009
- Hierarchical Nanostructures Are Crucial To Mitigate Ultrasmall Thermal Point LoadsNano Letters, 2009
- The Catalytic Synthesis of Three‐Dimensional Hierarchical Carbon Nanotube Composites with High Electrical Conductivity Based on Electrochemical Iron DepositionAdvanced Materials, 2007
- Chip cooling with integrated carbon nanotube microfin architecturesApplied Physics Letters, 2007
- Heat conduction in fractal tree-like branched networksInternational Journal of Heat and Mass Transfer, 2006
- Tapered Carbon Nanotubes from Activated Carbon PowdersAdvanced Materials, 2006
- Predicting the Thermal Resistance of Nanosized ConstrictionsNano Letters, 2005
- Anomalous vibrational energy diffusion in carbon nanotubesThe Journal of Chemical Physics, 2005
- Predicted structure and electronic properties of individual carbon nanocones and nanostructures assembled from nanoconesNanotechnology, 2001