One-pot large-area synthesis of graphitic filamentous nanocarbon-aligned carbon thin layer/carbon nanotube forest hybrid thin films and their corrosion behaviors in simulated seawater condition

Publication date: Available online 18 December 2016
Source:Chemical Engineering Journal
Author(s): Namjo Jeong, Eunjin Jwa, Chansoo Kim, Ji Yeon Choi, Joo-youn Nam, Kyo Sik Hwang, Ji-Hyung Han, Han-ki Kim, Soon-Chul Park, Yong Seog Seo, Moon Seok Jang
In this work, we demonstrate the large-area synthesis of graphitic filamentous nanocarbon-aligned carbon thin layer (GFNACTL) on Cu foil by chemical vapor deposition of C2H2 at 700 °C at 5 Torr pressure. The thickness of the GFNACTL can be controlled to vary in the range 50–4000 nm by varying the synthesis time. The graphitic filamentous nanocarbon with outer diameters ∼10–20 nm have highly oriented and well-connected graphitic structures that are stacked perpendicular to the growth direction. This result shows that the presence of a native oxide layer on the Cu foil was beneficial for the GFNACTL growth. Our approach can be extended to the one-pot synthesis of GFNACTL/carbon nanotube (CNT) forest hybrid thin films. The tip growth of CNTs with diameters of ∼ 50 nm was catalyzed on the GFNACTL by Cu41Sn11 nanoparticles. Corrosion measurements were performed in 0.6 M NaCl solution. Electrochemical analysis revealed a strong improvement in corrosion resistance as compared to pure Cu specimens, indicating the superior uniformity and promise of the GFNACTL/ CNT forest hybrid thin films for application as a protective coating.

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