June 19, 2017 A schematic of the P3HT film, showing regions that are able to subtly swell to let in ion molecules. Credit: Rajiv Giridharagopal The problem is a fundamental incompatibility in communication styles. That conclusion might crop up during divorce proceedings, or describe a diplomatic row. But scientists designing polymers that can bridge the biological and electronic divide must also deal with incompatible messaging styles. Electronics rely on racing streams of electrons, but the same is not true for our brains. "Most of our technology relies on electronic currents, but biology transduces signals with ions, which are charged atoms or molecules," said David Ginger, professor of chemistry at the University of Washington and chief scientist at the UW's Clean Energy Institute. "If you want to interface electronics and biology, you need a material that effectively communicates across those two realms." Ginger is lead author of a paper published online June 19 in Nature Materials in which UW researchers directly measured a thin film made of a single type of conjugated polymera conducting plasticas it interacted with ions and electrons. They show how variations in the polymer layout yielded rigid and non-rigid regions of the film, and that these regions … Continue reading
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