Silver nanowire array-polymer composite as thermal interface material

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Date
2009
Authors
Xu, Ju
Munari, Alessio
Dalton, Eric
Mathewson, Alan
Razeeb, Kafil M.
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Journal ISSN
Volume Title
Publisher
AIP Publishing
Published Version
10.1063/1.3271149
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Abstract
Silver nanowire arrays embedded inside polycarbonate templates are investigated as a viable thermal interface material for electronic cooling applications. The composite shows an average thermal diffusivity value of 1.89x10(-5) m(2) s(-1), which resulted in an intrinsic thermal conductivity of 30.3 W m(-1) K(-1). The nanowires' protrusion from the film surface enables it to conform to the surface roughness to make a better thermal contact. This resulted in a 61% reduction in thermal impedance when compared with blank polymer. An similar to 30 nm Au film on the top of the composite was found to act as a heat spreader, reducing the thermal impedance further by 35%. A contact impedance model was employed to compare the contact impedance of aligned silver nanowire-polymer composites with that of aligned carbon nanotubes, which showed that the Young's modulus of the composite is the defining factor in the overall thermal impedance of these composites.
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Keywords
Carbon nanotubes , Composite material interfaces , Gold , Metallic thin films , Nanocomposites , Nanowires , Polymers , Silver , Surface roughness , Thermal conductivity , Thermal diffusivity , Young's modulus
Citation
Xu, J., Munari, A., Dalton, E., Mathewson, A. and Razeeb, K. M. (2009) 'Silver nanowire array-polymer composite as thermal interface material', Journal of Applied Physics, 106(12), 124310 (7pp). doi: 10.1063/1.3271149
Link to publisher’s version
http://aip.scitation.org/doi/10.1063/1.3271149
URI
https://hdl.handle.net/10468/4748
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Tyndall National Institute - Journal Articles
Copyright
© 2009, American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Xu, J., Munari, A., Dalton, E., Mathewson, A. and Razeeb, K. M. (2009) 'Silver nanowire array-polymer composite as thermal interface material', Journal of Applied Physics, 106(12), 124310 (7pp). doi: 10.1063/1.3271149 and may be found at http://aip.scitation.org/doi/10.1063/1.3271149