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. 2015 Feb 12;5:8419. doi: 10.1038/srep08419

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Resonant frequency vs. power efficiency of the patterned liquid alloy coil with a reference coil (a), resistance change related to power efficiency loss at applied strain and misalignment (b), and the fabricated wireless power transfer device with an LED for visualized working with different strains at 0% (c) and 25% (d), and in various states such as rolled state (e) and conformal to human arm (f), respectively.