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Self‐Healing Reduced Graphene Oxide Films by Supersonic Kinetic Spraying
Author(s) -
Kim DoYeon,
SinhaRay Suman,
Park JungJae,
Lee JongGun,
Cha YouHong,
Bae SangHoon,
Ahn JongHyun,
Jung Yong Chae,
Kim Soo Min,
Yarin Alexander L.,
Yoon Sam S.
Publication year - 2014
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201400732
Subject(s) - materials science , supersonic speed , graphene , oxide , annealing (glass) , kinetic energy , nanotechnology , jet (fluid) , composite material , substrate (aquarium) , chemical engineering , metallurgy , thermodynamics , oceanography , physics , quantum mechanics , geology , engineering
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 C 2 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.