NOVELTY - A metal oxide material comprises metallic oxide(s) aligned in three-dimensionally periodic orientation to confer symmetric nanostructural morphology to the metal oxide material.    USE - The assembly is used in microelectronic device consisting of field emission device, photovoltaic device, optoelectronic device, blue optical device, ultraviolet optical device, transparent conductive film, transparent electronic imaging shielding device, transparent field effect transistor, supercapacitor, fuel cell, nanocomposite, data-storage device, biochemical sensor, chemical sensor, gas sensor, solar cell, photocatalysis device, bulk acoustic wave device, window heating device, or light emitting diode (claimed).    ADVANTAGE - The assembly has free-standing varied morphology produced in good yield that are required for its incorporation in the fabrication of microelectronic devices.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for a process for formation of metal oxide material with symmetric nanostructural morphology comprising:    (i) crystallizing a first metallic oxide to form thermally stable structure having 3-dimensionally periodic orientations, and infiltrating the structure formed by the first metallic oxide with a second metallic oxide to form a composite material to confer a symmetric nanostructural morphology to the composite material; and    (ii) a process for formation of nanostructural device comprising adherently depositing a catalyst material in microparticulate form in a predetermined configuration on surface of substrate material to provide catalytic sites on surface of material, initiating growth of microparticulate crystals of metallic oxide at the catalytic sites to form 3-dimensional periodic nanostructural crystalline nodes comprising metallic oxide, and allowing continued crystal growth of the metallic oxide to render nanostructural crystalline nodes of metallic oxide to become connected by 3-dimensional periodically aligned nanowire structures comprising metallic oxide.    DESCRIPTION OF DRAWING(S) - The figure shows a scanning electron microscope image of zinc oxide nanostructures synthesized by vapor transport and condensation technique.