標題: Exceptionally low thermal conductivity of poly(3-hexylthiophene) single nanowires
作者: Lee, Yi-Jung
Jeng, Kai-Sheng
Chen, Jiun-Tai
Sun, Kien Wen
應用化學系
電子工程學系及電子研究所
Department of Applied Chemistry
Department of Electronics Engineering and Institute of Electronics
公開日期: 1-Jan-2015
摘要: Electrical and thermal conductivity measurements were conducted by using microfabricated four-point probe and T-type nanosensors in a vacuum on poly(3-hexylthiophene) (P3HT) single nanowires prepared by the whisker method. The nanowires had a cross-section of only 5 nm x 15 nm and a length of 0.5-10 mu m. The electrical conductance of nanowires was 3.3 x 10(-7) 1/Omega and remained stable even after exposing the wires to ambient conditions for a few days. The thermal conductivity of a nanowire was 0.055 +/- 0.003 Wm(-1) K-1 which was approximately an order of magnitude lower than other previously reported P3HT single nanowires with a diameter of 120 nm and embedded in anodic aluminum oxide matrix. This thermal conductivity was also approximately four times smaller than that of P3HT amorphous thin films (similar to 0.2 W m(-1) K-1). The exceptionally low thermal conductivity was attributed to increased interface-phonon scattering because heat propagation was confined to an extreme narrow spatial dimension.
URI: http://dx.doi.org/10.1039/c5ra09977c
http://hdl.handle.net/11536/129456
ISSN: 2046-2069
DOI: 10.1039/c5ra09977c
期刊: RSC Advances
Volume: 5
Issue: 110
起始頁: 90847
結束頁: 90851
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