Self-Healing Reduced Graphene Oxide Films by Supersonic Kinetic Spraying
- Self-Healing Reduced Graphene Oxide Films by Supersonic Kinetic Spraying
- Do-Yeon Kim; Suman Sinha-Ray; Jung-Jae Park; Jong-Gun Lee; You-Hong Cha; Sang-Hoon Bae; Jong-Hyun Ahn; 정용채; 김수민; Alexander L. Yarin; Sam S. Yoon
- self-healing; graphene; supersonic; kinetic spraying; reduced graphene oxide; thin films
- Issue Date
- Advanced functional materials
- VOL 24, NO 31, 4986-4995
- The industrial scale application of graphene and other functional materials in the field of electronics has been limited by inherent defects, and the lack of simple deposition methods. A simple spray deposition method is developed that uses a supersonic air jet for a commercially available reduced graphene oxide (r-GO) suspension. The r-GO flakes are used as received, which are pre-annealed and pre-hydrazine-treated, and do not undergo any post-treatment. A part of the considerable kinetic energy of the r-GO flakes entrained by the supersonic jet is used in stretching the flakes upon impact with the substrate. The resulting “frozen elastic strains” heal the defects (topological defects, namely Stone-Wales defect and C2 vacancies) in the r-GO flakes, which is reflected in the reduced ratio of the intensities of the D and G bands in the deposited film. The defects can also be regenerated by annealing.
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