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Thin-Film Device Senses Texture by Touch

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Engineers at the University of Nebraska in Lincoln have developed a large-area, thin-film-based touch sensor with spatial resolution of about 40 μm — comparable to that of a human fingertip. As reported in the June 9 issue of Science, the electro-optical device comprises alternating self-assembled layers of gold and CdS nanoparticles separated by approximately 3-nm-thick polymer dielectric barriers. The layers are flanked by a flexible electrode constructed of gold on plastic and a transparent electrode of ITO on glass. To test the device, investigators Vivek Maheshwari and Ravi F....Read full article

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