초록 ▼

A method for generating spontaneously aligned surface wrinkles utilizes control of local moduli-mismatch and osmotic pressure. The method includes modifying the surface of an elastomeric layer to form a superlayer that is stiffer and/or less absorbent than the elastomeric layer. The elastomeric laye

A method for generating spontaneously aligned surface wrinkles utilizes control of local moduli-mismatch and osmotic pressure. The method includes modifying the surface of an elastomeric layer to form a superlayer that is stiffer and/or less absorbent than the elastomeric layer. The elastomeric layer is then swollen with a polymerizable monomer, which causes buckling of the superlayer. The monomer is then polymerized, dimensionally stabilizing the surface buckling. The buckled surfaces generated by the method are useful in a wide variety of end-use applications, including microlenses, microlens arrays, compound microlenses, diffraction gratings, photonic crystals, smart adhesives, mechanical strain sensors, microfluidic devices, and cell culture surfaces.

대표청구항 ▼

The invention claimed is: 1. A method of forming a microlens array, comprising:modifying a surface of an optically transparent elastomeric layer to form a plurality of optically transparent superlayer islands; wherein the elastomeric layer comprises a crosslinked polymer having a first flexural modu

The invention claimed is: 1. A method of forming a microlens array, comprising:modifying a surface of an optically transparent elastomeric layer to form a plurality of optically transparent superlayer islands; wherein the elastomeric layer comprises a crosslinked polymer having a first flexural modulus; and wherein the superlayer islands comprise a modification reaction product having a second flexural modulus greater than the first flexural modulus;swelling the elastomeric layer with a polymerizable monomer, thereby causing buckling of the superlayer islands; andpolymerizing the polymerizable monomer, thereby stabilizing the buckling of the superlayer islands;wherein each buckled superlayer island independently has a diameter of about 500 nanometers to about 500 micrometers and a radius of curvature such that a ratio of the radius of curvature to the diameter is about 0.5 to about 10.