TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The substrate has granite plate. The voltage applied in electric field assisted robotic nozzle printer is 0.1-30 kV. The substrate comprises insulating material, metal material, carbon material and/or conductive material. The copper precursor is chosen from 25 compounds e.g. copper acetate, copper acetylacetonate, copper carbonate, copper chloride and copper ethylacetoacetate. The titanium precursor is chosen from 14 compounds e.g. titanium chloride, titanium ethoxide, titanium fluoride, titanium hydride and titanium methoxide. The aluminum precursor is chosen from 27 compounds e.g. aluminum chloride, aluminum fluoride, aluminum hexafluoroacetylacetonate, aluminum hydroxide and aluminum 2,4-pentanedionate. The silver precursor is chosen from 20 compounds e.g. silver hexafluorophosphate, silver neodecanoate, silver trifluoromethanesulfonate, silver carbonate and silver perchlorate. The platinum precursor is chosen from 13 compounds e.g. chloroplatinic acid hexahydrate, dihydrogen hexahydroxyplatinate, platinum acetylacetonate, platinum chloride and tetraammineplatinum tetrachloroplatinate. The nickel precursor is chosen from 32 compounds e.g. hexaamminenickel chloride, nickel acetate, nickel acetylacetonate, nickel carbonyl and nickel chloride. The gold precursor is chosen from 10 compounds e.g. chlorocarbonyl gold, hydrogen tetrachloroaurate, hydrogen tetrachloroaurate hydrate, chlorotriethylphosphinegold and gold cyanide. The aligned metal precursor/organic polymer complex nanofiber pattern contains air or oxygen, nitrogen, hydrogen and/or argon.    TECHNOLOGY FOCUS - METALLURGY - Preferred Composition: The metal precursor comprises copper precursor, titanium precursor, aluminum precursor, silver precursor, platinum precursor, nickel precursor and/or gold precursor. The secondary metal precursor comprises copper precursor, titanium precursor, aluminum precursor, silver precursor, platinum precursor, nickel precursor and/or gold precursor. The metal nanofiber has a diameter of 10-3000 nm.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The amount of distilled water or organic solvent is 1-50 wt.%.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The weight ratio of metal precursor and organic polymer is 10:90-97:3. The metal precursor/organic polymer complex solution further includes secondary metal precursor. The organic polymer is chosen from 48 compounds e.g. polyvinyl alcohol, polyvinylacetate, polyhydroxylethyl methacrylate, polyethylene oxide and polystyrene.