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Pretreatment of carbon nanotube fibers for electrodeposited copper

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Document pages: 8 pages

Abstract: Because carbon nanotube copper (CNT Cu) composites have potential to improve properties, the development of carbon nanotube copper (CNT Cu) composites has attracted more and more attention. Carbon nanotube macromaterials usually exhibit high resistivity, low electrochemical reactivity and the presence of impurities, which hinder their use as metal electrochemical deposition substrates. In this study, different pretreatment methods of carbon nanotube fibers, such as heat treatment, Watts bath immersion, anodic oxidation and boric acid (H3BO3) exposure, were studied to improve the electrochemical response of copper deposition. The results show that these treatments will affect the surface activity of carbon nanotubes, including resistivity, polarization resistance and active surface area, so as to affect the electrodeposition process of copper. Poperties of CNT structures and CNT-Cu composites were researched by electrochemical impedance spectroscopy (EIS), galvanostatic copper deposition, scanning electron microscope (SEM), and four-point electrical resistance measurements. Heat treatment, Watts bath, anodization, and boric acid treatments were shown to be effective for modifying the CNT surface reactivity for subsequent electrochemical deposition of copper.

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