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The dynamics of polymerized carbon nanotubes in semiconductor polymer electronics and electro-mechanical sensing

机译：半导体聚合物电子学和机电传感中聚合碳纳米管的动力学

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摘要

Polymerized carbon nanotubes (CNTs) are promising materials for polymer-based electronics and electro-mechanical sensors. The advantage of having a polymer nanolayer on CNTs widens the scope for functionalizing it in various ways for polymer electronic devices. However, in this paper, we show for the first time experimentally that, due to a resistive polymer layer having carbon nanoparticle inclusions and polymerized carbon nanotubes, an interesting dynamics can be exploited. We first show analytically that the relative change in the resistance of a single isolated semiconductive nanotube is directly proportional to the axial and torsional dynamic strains, when the strains are small, whereas, in polymerized CNTs, the viscoelasticity of the polymer and its effective electrical polarization give rise to nonlinear effects as a function of frequency and bias voltage. A simplified formula is derived to account for these effects and validated in the light of experimental results. CNT-polymer-based channels have been fabricated on a PZT substrate. Strain sensing performance of such a one-dimensional channel structure is reported. For a single frequency modulated sine pulse as input, which is common in elastic and acoustic wave-based diagnostics, imaging, microwave devices, energy harvesting, etc, the performance of the fabricated channel has been found to be promising.
机译：聚合碳纳米管（CNT）是用于基于聚合物的电子产品和机电传感器的有前途的材料。在CNT上具有聚合物纳米层的优势扩大了以各种方式对聚合物电子器件进行功能化的范围。但是，在本文中，我们首次通过实验表明，由于具有碳纳米颗粒夹杂物和聚合的碳纳米管的电阻性聚合物层，可以开发出有趣的动力学方法。我们首先分析表明，当应变较小时，单个隔离的半导体纳米管的电阻的相对变化与轴向和扭转动态应变成正比，而在聚合的CNT中，聚合物的粘弹性及其有效的电极化随频率和偏置电压产生非线性效应。得出简化的公式以说明这些影响，并根据实验结果进行了验证。已经在PZT基板上制造了基于CNT聚合物的通道。报道了这种一维通道结构的应变感测性能。对于在基于弹性波和声波的诊断，成像，微波设备，能量收集等中常见的单频调制正弦脉冲作为输入，已发现预制通道的性能很有前途。

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