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Shoes that may harvest pounding of walking to power mobiles,[link widoczny dla zalogowanych]
You don`t generate that much power from walking or breathing,[link widoczny dla zalogowanych], so you want to harness it as efficiently as possible,[link widoczny dla zalogowanych]," said Michael McAlpine,[link widoczny dla zalogowanych], a professor of mechanical and aerospace engineering,[link widoczny dla zalogowanych], at Princeton,[link widoczny dla zalogowanych], who led the project.
The researchers first fabricated PZT nanoribbons - strips so narrow that 100 fit side-by-side in a space of a millimeter. In a separate process, they embedded these ribbons into clear sheets of silicone rubber,[link widoczny dla zalogowanych], creating what they call "piezo-rubber chips." Because the silicone is biocompatible,[link widoczny dla zalogowanych], it is already used for cosmetic implants and medical devices.
"The new electricity-harvesting devices could be implanted in the body to perpetually power medical devices,[link widoczny dla zalogowanych], and the body wouldn`t reject them,[link widoczny dla zalogowanych]," McAlpine said.
In addition to generating electricity when it is flexed,[link widoczny dla zalogowanych], the opposite is true: the material flexes when electrical current is applied to it. This opens the door to other kinds of applications,[link widoczny dla zalogowanych], such as use for microsurgical devices,[link widoczny dla zalogowanych], McAlpine said.
The study was published online Jan. 26,[link widoczny dla zalogowanych], in Nano Letters,[link widoczny dla zalogowanych], a journal of the American Chemical Society..
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