Enhanced Conductivity of Multilayer Copper–Carbon Nanofilms via Plasma Immersion Deposition

电导率 材料科学 电阻率和电导率 碳纤维 复合数 电极 复合材料 纳米技术 冶金 化学 电气工程 工程类 物理化学
作者
Haotian Weng,X. B. Zhang,Xuan Liu,Yunhui Tang,Hewei Yuan,Xu Yang,Kun Li,Xiaolu Huang
出处
期刊:Nano-micro Letters [Springer Science+Business Media]
卷期号:17 (1)
标识
DOI:10.1007/s40820-024-01628-6
摘要

Abstract Although room-temperature superconductivity is still difficult to achieve, researching materials with electrical conductivity significantly higher than that of copper will be of great importance in improving energy efficiency, reducing costs, lightening equipment weight, and enhancing overall performance. Herein, this study presents a novel copper–carbon nanofilm composite with enhanced conductivity which has great applications in the electronic devices and electrical equipment. Multilayer copper–carbon nanofilms and interfaces with superior electronic structures are formed based on copper materials using plasma immersion nanocarbon layer deposition technology, effectively enhancing conductivity. Experimental results show that for a five-layer copper–carbon nanofilm composite, the conductivity improves significantly when the thickness of the carbon nanofilm increases. When the carbon nanofilm accounts for 16% of the total thickness, the overall conductivity increases up to 30.20% compared to pure copper. The mechanism of the enhanced conductivity is analyzed including roles of copper atom adsorption sites and electron migration pathways by applying effective medium theory, first-principles calculations and density of states analysis. Under an applied electric field, the high-density electrons in the copper film can migrate into the nanocarbon film, forming highly efficient electron transport channels, which significantly enhance the material’s conductivity. Finally, large-area electrode coating equipment is developed based on this study, providing the novel and robust strategy to enhance the conductivity of copper materials, which enables industrial application of copper–carbon nanocomposite films in the field of high conductivity materials.
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