Articles including nanostructured surfaces and interpenetrating layers, and methods of making same

An article comprising:

• a. a first layer comprising a first material with a first elastic storage modulus of between 1×106 and less than 1×1010 pascals and having a nanostructured first surface comprising nanofeatures defining nanorecesses and an opposing second surface;
• and
• b. a second layer comprising a second material with a second elastic storage modulus of between greater than 1×1010 and 1.3×1012 pascals disposed on the nanostructured first surface of the first layer and filling the nanorecesses;
• wherein the second material is non-metallic, wherein the second layer has a nanostructured first surface comprising nanofeatures and a substantially planar opposing second surface, wherein the nanostructured first surface of the second layer is interpenetrated with the nanostructured first surface of the first layer, and wherein the second layer is an exterior layer.

An article comprising:

• a. a first layer comprising a first material with a first elastic storage modulus and having a nanostructured first surface comprising nanofeatures defining nanorecesses and an opposing second surface;
• and
• b. a second layer comprising a second material with a second elastic storage modulus disposed on the nanostructured first surface of the first layer and filling the nanorecesses;
• wherein the second layer has a nanostructured first surface that is interpenetrated with the nanostructured first surface of the first layer, and a substantially planar opposing second surface;
• wherein the second material is non-metallic;
• wherein the second elastic storage modulus is at least 1.5 times the first elastic storage modulus, and wherein the second layer is an exterior layer.