TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The step of preparing a salt solution is: prepared by further adding an acid in water, in organic solvent, or in a mixture of water and organic solvent; and prepared by combining at least a first solution and a second solution. The method further comprises: preparing the first solution by mixing water and organic solvent, adding an acid in water, or adding an acid in a mixture of water and organic solvent, or by mixing water and ethylene glycol, adding citric acid in water, or adding citric acid in a mixture of water and ethylene glycol; and preparing the second solution by dissolving at least one salt in water, or dissolving at least one salt in mixture of water and organic solvent. The step of preparing a salt solution is: prepared in a mixture of water and organic solvent and further selecting the organic solvent from a group consisting of ethanol, methanol, 1-propanol, 2-propanol, and/or tetrahydrofuran; prepared by selecting a salt from a group consisting cations of alkali metals such as lithium, sodium, potassium, and/or rubidium, alkaline earth metals such as magnesium, calcium, strontium, and/or barium, transition metals such as scandium, yttrium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, niobium, molybdenum, technetium, ruthenium, rhodium, palladium, silver, cadmium, hafnium, tantalum, tungsten, rhenium, osmium, iridium, platinum, and/or gold, post transition metals such as aluminum, gallium, indium, tin, thallium, lead, and/or bismuth, lanthanides such as lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and/or lutetium, actinides such as thorium, metalloids such as boron, silicon, germanium, arsenic, antimony, and/or tellurium, or nonmetals such as carbon, phosphorus, sulfur, and/or selenium; prepared by dissolving salts comprising cations of aluminum, yttrium, and/or scandium, and dopants consisting of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and/or lutetium; prepared by dissolving salts comprising cations of aluminum, zirconium, silicon, magnesium, and/or manganese, or the lanthanide cerium, and doping transition metals comprising palladium, platinum, nickel, silver, gold, ruthenium, rhodium, vanadium, molybdenum, cobalt, and/or tungsten, or nonmetal phosphorus; prepared by dissolving salts comprising cations of magnesium and yttrium; prepared by dissolving salts comprising cations of magnesium and aluminum; prepared by dissolving salts comprising cations of lanthanum, magnesium, and aluminum; prepared by dissolving salts comprising cations of zirconium, and yttrium or samarium; and/or prepared by selecting a salt from a group consisting of anions of nitrate, acetate, citrate, sulfate, carbonate, chloride, phosphate, alkoxide, atrane, tetraethyl orthosilicate, and/or metallic borohydride. The step of entraining the precursor droplets includes using at least two concentric laminar flows. The step of using at least two concentric laminar flows is prepared by selecting gases from a group consisting of air, oxygen, argon, methane, ammonia, and/or nitrogen. The step of controlling quenching rates is further adjusted by selecting a rate no less than 103 Kelvin per second (K/s) to no more than 106 K/s, preferably by selecting a chamber with controllable atmosphere.