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Studies from Pohang University of Science and Technology (POSTECH) Yield New Information about Nanoscale Research

May 6, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- Fresh data on Nanoscale Research are presented in a new report. According to news reporting out of Pohang, South Korea, by NewsRx editors, research stated, "Graphene has shown great potential as an electrode material for organic electronic devices such as organic field-effect transistors (FETs) because of its high conductivity, thinness, and good compatibility with organic semiconductor materials. To achieve high performance in graphene-based organic FETs, favorable molecular orientation and good crystallinity of organic semiconductors on graphene are desired."

Our news journalists obtained a quote from the research from the Pohang University of Science and Technology (POSTECH), "This strongly depends on the surface properties of graphene. Here, we investigate the effects of polymer residues that remain on graphene source/drain electrodes after the transfer/patterning processes on the self-organizing properties and field-effect characteristics of the overlying solution-processed triethylsilylethynyl-anthradithiophene (TES-ADT). A solvent-assisted polymer residue removal process was introduced to effectively remove residues or impurities on the graphene surface. Unlike vacuum-deposited small molecules, TES-ADT displayed a standing-up molecular assembly, which facilitates lateral charge transport, on both the residue-removed clean graphene and as-transferred graphene with polymer residues. However, TES-ADT films grown on the cleaned graphene showed a higher crystallinity and larger grain size than those on the as-transferred graphene."

According to the news editors, the research concluded: "The resulting TES-ADT FETs using cleaned graphene source/drain electrodes therefore exhibited a superior device performance compared to devices using as-transferred graphene electrodes, with mobilities as high as 1.38 cm(2) V(-1) s(-1)."

For more information on this research see: Self-organizing properties of triethylsilylethynyl-anthradithiophene on monolayer graphene electrodes in solution-processed transistors. Nanoscale, 2013;5(22):11094-101. (Royal Society of Chemistry -; Nanoscale -

Our news journalists report that additional information may be obtained by contacting J. Jang, Polymer Research Institute, Dept. of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, South Korea. Additional authors for this research include J. Park, S. Nam, J.E. Anthony, Y. Kim, K.S. Kim, K.S. Kim, B.H. Hong and C.E Park (see also Nanoscale Research).

Keywords for this news article include: Asia, Pohang, South Korea, Nanoscale Research.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC

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Source: Life Science Weekly

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