the invention generally relates to polymerizable conductive ink formulations comprising at least one metal source , at least one monomer and / or oligomer and a polymerization initiator , and uses thereof for printing three - dimensional functional structures . in particular a method of fabricating a three - dimensional conductive pattern on a substrate is disclosed , the method comprising : a ) forming a pattern on a surface region of a substrate by using an ink comprising at least one metal source , at least one liquid polymerizable monomer and / or oligomer , and at least one polymerization initiator ; b ) polymerizing at least a portion of said liquid monomer and / or oligomer ; c ) rendering the metal source a continuous percolation path for electrical conductivity ; d ) repeating steps , and optionally to obtain a three - dimensional conductive pattern .