The device will use an electroactive polymer layer covered with a thin layer of gold that rises slightly, possibly even wiggles, in response to electrical signals. Beneath that layer will be a layer of isolated electrodes that control segments of the polymer/gold layer. And below that will be a touchscreen connected to a computer. Audible feedback may be used to guide users’ fingers along lines in a graph or diagram. A prototype is expected in three years.

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Johns Hopkins University, jhu.edu