85 W/m∙K at 300 K). This might be caused by significant scattering of phonons, charge carriers, and bipolar diffusion as the neck size decreases. Acknowledgments This study was supported by a grant from the Global Excellent Technology Innovation R&D Program funded by the Ministry of Knowledge Economy, Republic of Korea (10038702-2010-01) and the

Basic Science Research CCI-779 datasheet Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2013–050316, P.I. S.K.L). This work was also supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD, NRF-2006-352-D00051) and partially supported by Chung-Ang University Research Grants in 2013. References 1. Lim JW, Hippalgaonkar

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