Abstract

Low temperature electrical properties of compound materials fabricated by introduction of single- and multi-walled carbon nanotubes with high level of purity into polymer host matrix were studied. Detailed investigation of lateral resistances of the prepared samples in the range of temperatures from 50 to 200 K were performed. Analysis of the conductivity mechanisms in this temperature range was performed by applying Arrhenius equation-based models. Temperature dependencies of lateral resistance were fitted to extract respective activation energies. Distinctions between fabricated specimens reinforced with multi-walled nanotubes and those doped by single-walled carbon nanotubes were demonstrated. It is concluded that composites with multi-walled carbon nanotubes generally exhibit lower resistances as compared to their single-walled counterpart.

摘要

研究了通过将高纯度的单壁和多壁碳纳米管引入到聚合物基质中制备的复合材料的低温电学性能。对所制备样品在 50 至 200 K 温度范围内的横向电阻进行了详细研究。通过应用基于 Arrhenius 方程的模型对该温度范围内的电导率机制进行分析。拟合横向电阻的温度依赖性以提取各自的活化能。证明了用多壁纳米管增强的制造样品与用单壁碳纳米管掺杂的样品之间的区别。得出的结论是，与单壁碳纳米管复合材料相比，具有多壁碳纳米管的复合材料通常表现出较低的电阻。