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S. Korean scientists develop flexible memory device

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(GlobalPost/GlobalPost)

SEOUL, May 29 (Yonhap) -- A group of South Korean scientists has developed a new transparent and highly flexible memory device using graphene electrodes that may help develop a new, more flexible semiconductor or display panel, the science ministry said Wednesday.

Currently, graphene is used only for the top electrode of monolayers in various products, giving them some flexibility, according to the Ministry of Science, ICT and Future Planning.

The team from Seoul's Sungkyunkwan University, however, was able to use graphene for both the top and bottom electrodes of a monolayer for the first time in the world.

The use of graphene for the bottom electrode was made possible through a chemical union of the bottom electrode with the molecular film of organic molecules placed between the two electrodes, the team said.

"The process of manufacturing organic molecules that can chemically bond with graphene is fairly easy, so the new device is expected to contribute greatly to the development of new organic semiconductors, such as flexible solar cells, replacing conventional devices with silicon or metal-based electrodes," Lee Hyo-young, a professor and researcher in the team, was quoted as saying.

The team's paper, titled, "Photo-switchable molecular monolayers anchored between highly transparent and flexible graphene electrodes," was published Tuesday in the on-line edition of the weekly science journal Nature Communications.

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