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Ion-beam-irradiated CYTOP-transferred graphene for liquid crystal cells

Electronic Materials Letters : Volume 13, Issue 1, January 2017

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Ion-beam-irradiated CYTOP-transferred graphene for liquid crystal cells

Content Provider	Springer Nature Link
Author	Oh, Jeong Hyeon Choi, Gyu Jin Kwon, Ki Chang Bae, Sa Rang Jang, Ho Won Gwag, Jin Seog Kim, Soo Young
Copyright Year	2017
Abstract	The twisted nematic liquid crystal cell was developed by using a CYTOP-transferred graphene sheet as an electrode and an alignment layer. A graphene layer was synthesized by chemical vapor deposition and transferred onto a plastic substrate using a fluoropolymer known as CYTOP. As the ion-beam treatment time increased, the sheet resistance increased from 500 to 1100 Ω/sq., while the water contact angle decreased from 110.5° to 69.7°. The increased intensities of the D and G′ bands and the appearance of D + D″ and D + G′ bands in the Raman spectra indicated the formation of defects because of the ion-beam treatment. An ion-beam exposure time of 15 s was found to be the most effective for the production of CYTOP-transferred graphene and for achieving high contrast in operating cells. The ion beam detached F from the CYTOP-transferred graphene layer, and the resulting exposure of the C=C bond on the graphene surface affected the alignment of liquid crystal molecules. Based on these results, the technique described here has applications in novel, high-performance liquid crystal displays that do not require indium-tin-oxide electrodes and polyimide alignment layers. Sheets synthesized by chemical vapor deposition were transferred and simultaneously doped using fluoropolymer supporting layers.
Starting Page	277
Ending Page	285
Page Count	9
File Format	PDF
ISSN	17388090
Journal	Electronic Materials Letters
Volume Number	13
Issue Number	3
e-ISSN	20936788
Language	English
Publisher	The Korean Institute of Metals and Materials
Publisher Date	2017-05-10
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	graphene fluoropolymer ion-beam irradiation transparent electrode alignment layer liquid crystal displays Optical and Electronic Materials Condensed Matter Physics Nanotechnology and Microengineering Characterization and Evaluation of Materials Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials

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