NanoPower Research Labs, Golisano Institute for Sustainability, Rochester Institute of Technology, Rochester, New York 14623, United States.
ACS Appl Mater Interfaces. 2012 Feb;4(2):1103-9. doi: 10.1021/am201729g. Epub 2012 Feb 9.
Coaxial cables have been constructed with carbon nanotube (CNT) materials serving as both the inner and outer conductors. Treatment of the CNT outer and inner conductors with KAuBr(4) was found to significantly reduce the attenuation of these cables, which demonstrates that chemical agents can be used to improve power transmission through CNT networks at high frequencies (150 kHz-3 GHz). For cables constructed with a KAuBr(4)-treated CNT outer conductor, power attenuation per length approaches parity with cables constructed from metallic conductors at significantly lower weight per length (i.e., 7.1 g/m for CNT designs compared to 38.8 g/m for an RG-58 design). A relationship between the thickness of the CNT outer conductor and the cable attenuation was observed and used to estimate the effective skin depth at high frequency. These results establish reliable, reproducible methods for the construction of coaxial cables from CNT materials that can facilitate further investigation of their performance in high-frequency transmission structures, and highlight a specific opportunity for significant reduction in coaxial cable mass.
同轴电缆已用碳纳米管（CNT）材料制成，用作内导体和外导体。研究发现，用 KAuBr(4)处理 CNT 内外导体可显著降低这些电缆的衰减，这表明可以使用化学试剂来提高 CNT 网络在高频（150 kHz-3 GHz）下的功率传输。对于用 KAuBr(4)处理的 CNT 外导体制成的电缆，每单位长度的功率衰减接近用金属导体制成的电缆，而每单位长度的重量明显更轻（即 CNT 设计为 7.1 g/m，而 RG-58 设计为 38.8 g/m）。观察到 CNT 外导体厚度与电缆衰减之间的关系，并用于估计高频时的有效趋肤深度。这些结果为使用 CNT 材料构建可靠、可重复的同轴电缆提供了方法，这有助于进一步研究它们在高频传输结构中的性能，并突出了同轴电缆质量显著降低的特定机会。
