Abstract: A fishing lure comprises a hydrogel material and at least one water soluble attractant. The fishing lure can be a single hydrogel component or can have a core-shell structure having one or more shells on a core, where the shells and core differ by repeating unit composition and/or by the cross-linking density of the shell and core material, wherein the core is more highly cross-linked than the shells. The hydrogel can be cross-linked ionically, covalently, or physically by phase separation of a block copolymer. The fishing lure displays a loss of attractant during use, but the lure can be reloaded by submerging the lure in a solution of or in neat liquid attractant. When the fishing lure has a core-shell structure, an additional attractant that has low water-solubility, such as a lipid or oil, can be infused into the lure.

Abstract: A surface patterned contact lens is composed of a silicon hydrogel and has one or more surface regions that are patterned with nano-scale roughness features, micro-wells, micro-protrusions, and/or micro-channels. The micro-wells, micro-protrusions, and/or micro-channels have depths and heights that are on nanometer dimensions. The nano-scale roughness features have dimensions less than 200 nm in width, depth or height. The surface patterns do not diffract light and do not inhibit the clarity that can be detected by the eye. A method of preparing the surface patterned contact lens involves molding, where a complementary negative of the surface patterned contact lens is displayed by the mold.