Instituto de Microelectrónica de Madrid, Calle de Isaac Newton, 8 28760 Tres Cantos, Madrid, Spain.
Nanoscale. 2014 Jul 21;6(14):7858-65. doi: 10.1039/c4nr00107a.
To date, there is no experimental characterization of thermal conductivity of semiconductor polymeric individual nanowires embedded in a matrix. This work reports on scanning thermal microscopy measurements in a 3ω configuration to determine how the thermal conductivity of individual nanowires made of a model conjugated polymer (P3HT) is modified when decreasing their diameters. We observe a reduction of thermal conductivity, from λNW = 2.29 ± 0.15 W K(-1) m(-1) to λNW = 0.5 ± 0.24 W K(-1) m(-1), when the diameter of nanowires is reduced from 350 nm to 120 nm, which correlates with the polymer crystal orientation measured by WAXS. Through this work, the foundations for future polymer thermal transport engineering are presented.
迄今为止，对于嵌入基质中的半导体聚合物单根纳米线的热导率，还没有实验特性描述。本工作报告了在 3ω 配置中进行扫描热显微镜测量的结果，以确定当单根纳米线的直径减小时，由模型共轭聚合物（P3HT）制成的单根纳米线的热导率如何发生变化。我们观察到，当纳米线的直径从 350nm 减小到 120nm 时，热导率从 λNW = 2.29 ± 0.15 W K(-1) m(-1) 减小到 λNW = 0.5 ± 0.24 W K(-1) m(-1)，这与通过 WAXS 测量的聚合物晶体取向相关。通过这项工作，为未来的聚合物热传输工程奠定了基础。
