Method for forming metal nanowire or metal nanomesh

A method for forming a metal nanowire or a metal nanomesh, comprising the steps of:

• forming a block copolymer thin film on a substrate, in which the block copolymer thin film includes hard segments containing a repeating unit of Chemical Formula 1 and soft segments containing a poly(meth)acrylate-based repeating unit of Chemical Formula 2;
• conducting orientation of the hard segments and soft segments in a lamellar or cylindrical form in the block copolymer thin film;
• adsorbing an oxide of a transition metal onto the block copolymer thin film, in which the oxide of a transition metal is selectively adsorbed onto the hard segments;
• selectively removing the soft segments;
• adsorbing a metal precursor onto the hard segments;
• and
• removing the hard segments and forming the metal nanowire or the metal nanomesh, by treating the hard segments with oxygen plasma:
• in Chemical Formula 1, n is an integer of 5 to 600, R is hydrogen or methyl, R′ is X,
• X is —Z—R″, Y is alkylene having 1 to 10 carbon atoms, Z is arylene having 6 to 20 carbon atoms, R″ is a linear or branched hydrocarbon having 10 to 20 carbon atoms, or a linear or branched perfluorohydrocarbon having 10 to 20 carbon atoms,
• in Chemical Formula 2, m is an integer of 30 to 1000, R1 and R2 are methyl,
• wherein the step of adsorbing an oxide of a transition metal onto the block copolymer thin film, the block copolymer thin film is treated with a solution including 0.05 to 1.0 wt % of RuO4 or OSO4,
• wherein the hard segment is a crystalline hard segment,
• wherein the crystalline hard segment and the block copolymer including the same has a melting point (Tm) of 200 to 300° C., and the soft segment has a glass transition temperature (Tg) of 40 to 130° C., and
• wherein the step of conducting orientation includes a step of conducting solvent annealing of the block copolymer thin film or conducting heat treatment at a temperature higher than the melting point of the hard segment and the glass transition temperature of the soft segment.