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We design a double U-shaped ring-based metamaterial, which has a good capability of the realization of sense of refractive indexes. The metamaterial consists of two regularly spaced parallel arrays of U-shaped rings with 90° rotation embedded in a medium, in the top of which an array of holes are dug for sensing unknown materials. Our simulations demonstrate that the structure can recognize subtle...
Super-hydrophobic aluminum (Al) surfaces were successfully fabricated via electrochemical machining in neutral NaClO3 electrolyte and subsequent fluoroalkylsilane (FAS) modification. The effects of the processing time, processing current density, and electrolyte concentration on the wettability, morphology, and roughness were studied. The surface morphology, chemical composition, and wettability of...
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