Disclosed are nano-sized metals and metal salts stabilized by using
semi-telechelic and telechelic polymers prepared through living anionic
polymerization, and their synthetic methods, and a nanostructure wherein
the nano-sized particles are self-assembled by mixing block copolymers
and film-casting. The present invention provides a new method for
preparing nano-sized particles capable of easily accomplishing
nanostructure by merely mixing, especially with block copolymers, and
having excellent stability.