碳纳米管纤维中的输运与光电导
Transport and Photo-Conduction in Carbon Nanotube Fibers
摘要：
我们的特点是导电性的碳纳米管（CNT）纤维富含半导体物种的温度和脉冲激光照射的266 nm波长的函数。虽然在高温下的响应接近阿耳忒弥斯定律的行为，从室温下降到4.2 K的响应可以被框定，定量地，在预测的波动引起的隧道之间发生的样品的内部原纤维（束）和/或构成纤维的基本碳纳米管。激光照射诱导的导电性的增强，和分析所得的数据证实了（指数）依赖的势垒温度的波动诱导的隧穿模型所预期的。通过COMSOL模拟，以排除裸露的加热现象作为我们的实验的背景，由激光照射的光纤的实验配置的热图也得到。（*）作者
英文摘要：
We have characterized the conductivity of carbon nanotubes (CNT) fibers enriched in semiconducting species as a function of temperature and pulsed laser irradiation of 266 nm wavelength. While at high temperatures the response approaches an Arrhenius law behavior, from room temperature down to 4.2 K the response can be framed, quantitatively, within the predictions of the fluctuation induced tunneling which occurs between the inner fibrils (bundles) of the samples and/or the elementary CNTs constituting the fibers. Laser irradiation induces an enhancement of the conductivity, and analysis of the resulting data confirms the (exponential) dependence of the potential barrier upon temperature as expected from the fluctuation induced tunneling model. A thermal map of the experimental configuration consisting of laser-irradiated fibers is also obtained via COMSOL simulations in order to rule out bare heating phenomena as the background of our experiments. (*) Author
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