Abstract
Understanding thermal transport in nanostructured materials is important for the development of energy conversion applications1,2,3,4 and the thermal management of microelectronic and optoelectronic devices5. Most nanostructures interact through van der Waals interactions6, and these interactions typically lead to a reduction in thermal transport7,8,9,10. Here, we show that the thermal conductivity of a bundle of boron nanoribbons can be significantly higher than that of a single free-standing nanoribbon. Moreover, the thermal conductivity of the bundle can be switched between the enhanced values and that of a single nanoribbon by wetting the van der Waals interface between the nanoribbons with various solutions.
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Acknowledgements
The authors acknowledge financial support from the US National Science Foundation (grants 0800306, 0821604, 0800366, 0748090 and 1067213) and from Lockheed Martin Corporation under the program ‘Engineering & Technology University Research Initiatives’. R.P. acknowledges financial support from the Office of Naval Research through a MURI grant (N00014-07-1-0723). Part of this research was performed at Oak Ridge National Laboratory's Center for Nanophase Materials Sciences with the help of J. Fowlkes. The authors thank C. Dames, L. Feldman and L. Shi for valuable discussions.
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J.Y., Y.Y. and S.W.W. performed thermal conductivity measurements. T.T.X. prepared the nanoribbons. Y.Y. and R.P. carried out the theoretical analysis. X.W. and H.Z. performed AFM studies and T.G. the TEM investigations. Y.J. carried out the nanoindentation procedure. J.Y., A.A.Z., R.P., Y.C., T.T.X. and D.L. contributed to data analysis and discussions. A.A.Z., T.T.X. and D.L. supervised the project and J.Y., R.P. and D.L. prepared the manuscript.
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Yang, J., Yang, Y., Waltermire, S. et al. Enhanced and switchable nanoscale thermal conduction due to van der Waals interfaces. Nature Nanotech 7, 91–95 (2012). https://doi.org/10.1038/nnano.2011.216
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DOI: https://doi.org/10.1038/nnano.2011.216
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