Patent ID: 8518837

Claim:
A method of preparing a nanopatterned surface, comprising: forming a block copolymer film on a substrate; wherein the block copolymer film has a thickness and comprises a major phase and a minor phase; and wherein the minor phase comprises cylindrical domains extending through the thickness of the block copolymer film; annealing the block copolymer film in an annealing solvent vapor to form an annealed block copolymer film; surface reconstructing the annealed block copolymer film to form a surface-reconstructed block copolymer film; wherein the surface-reconstructed block copolymer film comprises a major phase layer comprising the major phase and being in contact with a surface of the substrate, and a minor phase layer comprising the minor phase and being in contact with a surface of the major phase layer opposite the substrate; wherein the surface-reconstructed block copolymer film defines an array of cylindrical pores; and wherein the surface reconstructing the annealed block copolymer film comprises immersing the annealed block copolymer film in a solvent comprising a C 1 -C 3 alkanol; depositing a metal on the surface reconstructed block copolymer film to form a metal-coated block copolymer film comprising a metal layer contacting the minor phase layer on a surface of the minor phase layer opposite the major phase layer; and heating the metal-coated block copolymer film to form a redistributed metal-coated block copolymer film in which at least a portion of the metal has been transferred into the cylindrical pores.