its absorption spectrum as shown in fig6 as shown in fig6 and table 2 the nano silver wires were formed by only being left to stand at room temperature for a long period without annealing however the anneal step may accelerate the forming of the nano silver wires the nano silver wire having a diameter of 300 nm and a length of 10 cm was formed by annealing at a temperature of 200 u00b0 c for a period of 10 minutes longer annealing period was not needed the nano silver wire had a conductivity of 6 9 u00d7 10 4 s m an ammonium hydroxide solution of silver oxide with a silver oxide concentration of 1 mg ml and an ammonium hydroxide concentration of 33 was put into a syringe connected to a core pipe of a needle a methanol solution of pvp and tbap with a pvp concentration of 100 mg ml and a tbap concentration of 10 mg ml was put into another syringe connected to a shell pipe of the needle the silver precursor solution in the core pipe was controlled by a syringe pump to have a flow rate of 0 01 ml hr and the polymer solution in the shell pipe was controlled by another syringe pump to have a flow rate of 1 ml hr a nano line having a.