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- Title
Self-Healing Reduced Graphene Oxide Films by Supersonic Kinetic Spraying.
- Authors
Kim, Do‐Yeon; Sinha‐Ray, Suman; Park, Jung‐Jae; Lee, Jong‐Gun; Cha, You‐Hong; Bae, Sang‐Hoon; Ahn, Jong‐Hyun; Jung, Yong Chae; Kim, Soo Min; Yarin, Alexander L.; Yoon, Sam S.
- Abstract
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.
- Subjects
GRAPHENE oxide; SELF-healing materials; SUSPENSIONS (Chemistry); AIR jets; KINETIC energy
- Publication
Advanced Functional Materials, 2014, Vol 24, Issue 31, p4986
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.201400732