Abstract Noise defines the minimum level of the operational signal and is an important figure of merit for various devices. Here, we studied the low-frequency (1/f) noise characteristics of randomly oriented networks of carbon nanotubes and examined the effect of ultraviolet (UV) light on it. The amplitude of 1/f noise in our devices was strongly affected by the quality of nanotubes. This makes noise spectroscopy an effective tool to characterize the structural quality of carbon nanotube devices. UV illumination increased the device resistance and noise amplitude preserving the spectra shapes. This effect remained for tens of minutes even after the UV light was turned off. We observed a completely different trend of noise spectra and resistance with temperature as compared to UV illumination. These results indicated at least two important components of resistance that contribute to the total resistance of the device and are essential to describe the nanotube networks correctly.

中文翻译：

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紫外光对碳纳米管网络中 1/f 噪声的影响

摘要 噪声定义了操作信号的最低水平，是各种设备的重要品质因数。在这里，我们研究了碳纳米管随机取向网络的低频 (1/f) 噪声特性，并检查了紫外线 (UV) 光对其的影响。我们器件中 1/f 噪声的幅度受到纳米管质量的强烈影响。这使得噪声光谱成为表征碳纳米管器件结构质量的有效工具。紫外线照射增加了设备电阻和噪声幅度，保留了光谱形状。即使在关闭紫外线灯后，这种效果也会保持数十分钟。与紫外线照射相比，我们观察到噪声光谱和电阻随温度的完全不同趋势。