Size-dependent thermal conductivity of individual single-crystalline PbTe nanowires

Jong Wook Roh; So Young Jang; Joohoon Kang; Seunghyun Lee; Jin-Seo Noh; Woochul Kim; Jeunghee Park; Wooyoung Lee
March 2010
Applied Physics Letters;3/8/2010, Vol. 96 Issue 10, p103101
Academic Journal
We investigated the thermal conductivity of individual single-crystalline PbTe nanowires grown by a chemical vapor transport method. Thermal conductivities of PbTe nanowires 182–436 nm in diameter were measured using suspended microdevices. The thermal conductivity of a PbTe nanowire appeared to decrease with decreasing nanowire diameter and was measured to be 1.29 W/mK for a 182 nm nanowire at 300 K, which is about half of that of bulk PbTe. Our results indicate that phonon transport through a PbTe nanowire is effectively suppressed by the enhanced phonon boundary scattering due to size effects.


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