Viscosity-Controllable Graphene Oxide Colloids Using Electrophoretically Deposited Graphene Oxide Sheets
Jinseok Choi,
Seong-Gyu Park,
Yeo-Jin Choi,
Seung-Mun Baek,
Han-Jung Kim,
Yoonkap Kim,
Ki-Sik Im,
Sung-Jin An
Affiliations
Jinseok Choi
Department of Advanced Materials Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea
Seong-Gyu Park
Department of Advanced Materials Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea
Yeo-Jin Choi
Department of Advanced Materials Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea
Seung-Mun Baek
Department of Advanced Materials Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea
Han-Jung Kim
Nano Electronic Materials and Components Research Center, Gumi Electronics and Information Technology Research Institute, Gumi 39171, Republic of Korea
Yoonkap Kim
Nano Electronic Materials and Components Research Center, Gumi Electronics and Information Technology Research Institute, Gumi 39171, Republic of Korea
Ki-Sik Im
Department of Green Semiconductor System, Daegu Campus, Korea Polytechnics, Daegu 41765, Republic of Korea
Sung-Jin An
Department of Advanced Materials Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea
Graphene oxide (GO) is one of the interesting ink materials owing to its fascinating properties, such as high dissolubility in water and high controllable electric properties. For versatile printing application, the viscosity of GO colloids should be controlled in order to meet the specific process requirements. Here, we report on the relatively rapid fabrication of viscosity-increased GO (VIGO) colloids mixed with electrophoretically deposited GO sheets (EPD-GO). As the GO colloid concentration, applied voltage, and deposition time increase, the viscosity of the GO colloids becomes high. The reason for the improved viscosity of GO colloids is because EPD-GO has parallel stacked GO sheets. The GO and VIGO colloids are compared and characterized using various chemical and structural analyzers. Consequently, our simple and fast method for the fabrication of GO colloids with enhanced viscosity can be used for producing inks for flexible and printed electronics.
