Electrical Patterning of Graphene Circuitry by Hydrogenation for Transparent and Flexible Devices

Electrical Patterning of Graphene Circuitry by Hydrogenation for Transparent and Flexible Devices
손장엽Jongin ChaJongill Hong
Hydrogenation; Graphene; Flexible; Transparernt; Chemical patterning
Issue Date
Chemistry of materials
Preventing or reducing side effects caused by defects 5 created during patterning processes has long posed a major 6 challenge to device fabrications. Such defects on the surfaces and 7 at the boundaries can fatally impair device performance. This is 8 particularly the case for graphene-based devices because graphene is 9 a surface itself, and its surface states exclusively determine the 10 properties. Here, we show that our hydrogenated patterning of 11 graphene can be a breakthrough in electrical patterning for graphene 12 circuitry with the least possible damage. Hydrogenated graphene 13 can electrically passivate graphene while neither sacrificing optical properties nor generating defects. We prove that it is the most 14 suitable process for transparent and flexible substrates due to its high mechanical strength. Our direct transfer of graphene patterns 15 onto Cu foils after hydrogenation is far superior to other methods since it makes it possible not only to transfer complex patterns to 16 flexible substrates but to reduce the number of patterning steps. Finally, our proof-of-concept of a touch sensor made using our 17 method confirmed its applicability in practice. We believe that our method will become a valuable alternative method for fabricating 18 envisioned graphene-based electronic devices built on flat as well as transparent and flexible substrates, resulting in suitable and 19 competitive applications.
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