Superhydrophobic Copper Surfaces with Anticorrosion Properties Fabricated by Solventless CVD Methods
| Autor: | Salvador Borrós, Ignasi Vilaró, Jose L. Yagüe |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Tafel equation
Materials science chemistry.chemical_element Nanotechnology 02 engineering and technology Chemical vapor deposition engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Copper Surface energy 0104 chemical sciences Corrosion Contact angle Chemical engineering chemistry Coating engineering Surface modification General Materials Science 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 9:1057-1065 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.6b12119 |
| Popis: | Due to continuous miniaturization and increasing number of electrical components in electronics, copper interconnections have become critical for the design of 3D integrated circuits. However, corrosion attack on the copper metal can affect the electronic performance of the material. Superhydrophobic coatings are a commonly used strategy to prevent this undesired effect. In this work, a solventless two-steps process was developed to fabricate superhydrophobic copper surfaces using chemical vapor deposition (CVD) methods. The superhydrophobic state was achieved through the design of a hierarchical structure, combining micro-/nanoscale domains. In the first step, O2- and Ar-plasma etchings were performed on the copper substrate to generate microroughness. Afterward, a conformal copolymer, 1H,1H,2H,2H-perfluorodecyl acrylate-ethylene glycol diacrylate [p(PFDA-co-EGDA)], was deposited on top of the metal via initiated CVD (iCVD) to lower the surface energy of the surface. The copolymer topography exhibited a very characteristic and unique nanoworm-like structure. The combination of the nanofeatures of the polymer with the microroughness of the copper led to achievement of the superhydrophobic state. AFM, SEM, and XPS were used to characterize the evolution in topography and chemical composition during the CVD processes. The modified copper showed water contact angles as high as 163° and hysteresis as low as 1°. The coating withstood exposure to aggressive media for extended periods of time. Tafel analysis was used to compare the corrosion rates between bare and modified copper. Results indicated that iCVD-coated copper corrodes 3 orders of magnitude slower than untreated copper. The surface modification process yielded repeatable and robust superhydrophobic coatings with remarkable anticorrosion properties. |
| Databáze: | OpenAIRE |
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