TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The first metal precursor is trimethylaluminum, aluminum chloride, zinc chloride, cadmium chloride, stannic chloride, titanium tetrachloride, tungsten hexafluoride or diethyl zinc. The reactive functional group is a carbonyl group, where the inorganic feature comprises a material including trimethyl aluminum (TMA), yttrium tris (2,2,6,6-tetramethyl-3,5-heptanedionate), diethyl zinc, titanium tetrachloride, vanadium(V) oxytriisopropoxide, palladium(II) hexafluoroacetylacetonate, copper bis(2,2,6,6-tetramethyl-3,5-heptanedionate), copper(II)hexafluoroacetylacetonate hydrate, iron tris(2,2,6,6-tetramethyl-3,5-heptanedionate), cobalt tris(2,2,6,6-tetramethyl-3,5-heptanedionate), bis(2,2,6,6-tetramethyl-3,5-heptanedionato)barium triglyme adduct, bis(cyclopentadienyl) ruthenium, disilane, tungsten hexafluoride, bis(N,N'-diisopropylacetamidinato)copper(I), nickel(II) acetylacetonate, antimony pentachloride, niobium pentachloride, niobium pentethoxide, titanium isopropoxide, tris(tetramethylcyclopentadienyl)cerium(III), cyclopentadienyl indium, tris(isopropylcyclopentadienyl) lanthanum, bis(cyclopentadienyl)magnesium, bis(cyclopentadienyl)nickel, (trimethyl)methylcyclopentadienylplatinum(IV), bis(pentamethylcyclopentadienyl)strontium, tris(cyclopentadienyl)yttrium, bis(cyclopentadienyl)dimethylzirconium, bis(methylcyclopentadienyl)methoxymethyl zirconium, tetrakis(dimethylamino)tin, tetrakis(dimethylamino)zirconium, tris(dimethylamino)aluminum, iridium(III) acetylacetonate, niobium pentafluoride, ferrocene, cyclohexadiene iron tricarbonyl, tetrakis(dimethylamino)antimony, aluminum trichloride, niobium(V) iodide, tin(IV) iodide, tris(tetramethylcyclopentadienyl)gadolinium(III), bis(pentamethylcyclopentadienyl) barium 1,2-dimethoxyethane adduct, molybdenum hexafluoride, tris(tert-pentoxy)silanol, Silicon tetrachloride, lithium tertiary-butoxide, trimethyl indium, trimethyl gallium, or dimethyl cadmium.    TECHNOLOGY FOCUS - POLYMERS - Preferred Method: The method (M1) further comprises removing at least a portion of the block copolymer scaffold following formation of the inorganic features, where the inorganic features are retained with the following removal of the scaffold, the inorganic features retain a configuration defined by the self-assembled periodic polymer nanostructures, and the retained inorganic features comprises many ordered aluminum oxide nanocylinders. The method of preparing inorganic features is sequential infiltration synthesis. In the method (M1): the first polymer forms many self-assembled periodic nanostructures which are characterized by a configuration of spheres, cylinders, lamellae or bicontinuous structures; at least some of the self-assembled periodic polymer nanostructures are disposed within a matrix containing the second polymer, and the first metal precursor and the second co-reactant precursor infiltrate the matrix. The method (M2) further comprises: alternately exposing the block copolymer to a metal precursor and the second precursor until the inorganic features achieve a desired dimension; using the metal cylinders as an array emitter or a field emitter; and purging the block copolymer scaffold with an inert gas after each exposure of the metal precursor and after each exposure of the second precursor. In the method (M2): a size-selective membrane is prepared using a porous inorganic membrane fabricated from atomic layer deposition growth within a cylindrical or three-dimensional network containing a bicontinuous structured block copolymer; and many indium tin oxide cylinders form a three-dimensional electrical contact infiltrating a conjugated polymer features. Preferred Components: The first polymer comprises a high refractive index periodic inorganic material configured to filter and/or guide selected wavelengths of light. The first polymer includes at least one of a carbonyl group, pyridine group and a hydroxy group, and the first metal precursor is selected to selectively bind to the one of the carbonyl group, a pyridine group and a hydroxy group. The block copolymer comprises: nano structured polystyrene-block-poly (methyl methacrylate) and the first polymer defines many PMMA nanocylinders, where the inorganic features is a metal, metal nitride, metal sulfide or other metal chalcogenide, metal carbide, metal phosphide, or a metal oxide; and poly(3-hexylthiophene) or other conjugated polymer and the inorganic features comprises a complementary semiconductor. In the method (M2) the metal precursor is the first precursor and a third precursor, where the third precursor includes a second metal non-reactive with the reactive functional group; many inorganic features comprise platinum, palladium, or other catalytically active metal species arranged to form a catalyst; the configuration of each of the nanoscale domains is cylindrical; and the block copolymer comprises polystyrene-block-poly (methyl methacrylate) and the inorganic feature is a metal oxide. The second precursor is water, hydrogen peroxide, nitrous oxide, oxygen, ozone, hydrogen, formaldehyde, trimethyl aluminum, ammonia, hydrazine, dimethyl hydrazine, diethyl hydrazine, methyl-ethyl hydrazine, hydrogen sulfide, trimethyl phosphite, trimethyl phosphate, silane or disilane. In the nanocomposite material: the functional group is a carbonyl group, pyridine group or a hydroxy group; the metal features include a second metal oxide selectively bound to the first metal oxide; the first polymer comprises a hole-transport polymer and the inorganic material is characterized by a wide-band-gap semiconductor, and the nanocomposite material is integrated in an organic-inorganic hybrid photovoltaic device; and the first polymer comprises an electron- or an ion-conducting polymer, where the inorganic material provides structural support for a separation membrane in a battery. EXAMPLE - No suitable example given.