The Relationship between Contact Resistance and Contact Force on Au coated Carbon Nanotube surfaces

E. M. Yunus, J. McBride, S. Spearing
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引用次数: 25

Abstract

Carbon-nanotube (CNT) coated surfaces are investigated to determine the electrical contact performance under low force conditions. The surfaces under investigation are multi-walled CNTs formed on a silicon substrate and coated with an Au film. These planar surfaces are mated with a hemispherical Au plated probe mounted in a nano-indentation apparatus. The maximum contact force used is 1 mN. The contact resistance of these surfaces is investigated as a function of the applied force and is also studied under repeated loading cycles. The surfaces are compared with a reference Au-Au contact under the same experimental conditions and the results compared to established contact theory. The results show that the multi-walled CNT surface provides a stable contact resistance, but that the performance could be improved further with the application of single-walled CNT coatings. This initial study shows the potential for the application of CNT surfaces as an interface in low force electrical contact applications.
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镀金碳纳米管表面接触电阻与接触力的关系
研究了碳纳米管(CNT)涂层表面在低力条件下的电接触性能。所研究的表面是在硅衬底上形成的多壁碳纳米管,并涂有一层Au膜。这些平面表面与安装在纳米压痕装置中的半球形镀金探针相匹配。使用的最大接触力为1mn。研究了这些表面的接触阻力作为施加力的函数,并研究了重复加载循环下的接触阻力。在相同的实验条件下,将表面与参考的Au-Au接触进行了比较,并将结果与已建立的接触理论进行了比较。结果表明,多壁碳纳米管表面提供了稳定的接触电阻,但单壁碳纳米管涂层的应用可以进一步提高其性能。这项初步研究显示了碳纳米管表面在低力电接触应用中作为界面应用的潜力。
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