TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The method comprises: reacting the constituents in a first solvent, where the first solvent has a boiling point of at least 200 degrees C; and controlling the length of the reaction period to obtain a nanoparticle having a desired dimension. Preferred Components: The electron-accepting group comprises a metal, boron or silicon. The electron-accepting group comprises a group II metal or a group III element, where the metal is scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, silver, molybdenum, ruthenium, palladium, cadmium, tantalum, tungsten, osmium, iridium, platinum, gold and mercury. The constituents comprise materials containing at least two metals, boron or silicon. The second material is a metal amide. The first material is indium iodide and the second material is sodium amide, uranium amide or potassium amide and the capping agent having an electron accepting group is a zinc carboxylate.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The constituents further comprise a capping agent having an electron-donating group. The electron-donating group is phosphines, phosphine oxides, carboxylic acids, carboxylates, amines, sulfonates, esters, thiols and thiolates. The at least one capping agent comprises a group for promoting solubility of the nanoparticle in a second solvent. The second solvent is a polar solvent or a non-polar solvent, and preferably the second solvent is methanol, ethanol, water, toluene, hexane or an ether. The group for promoting solubility of the nanoparticle is an alkyl chain.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The nitride nanoparticle is a group III nitride nanoparticle, an indium nitride nanoparticle. The light-emissive nitride nanoparticle has a photoluminescence quantum yield of at least 1%, preferably at least 20%. EXAMPLE - Indium iodide (300 mg), sodium amide (500 mg), hexadecanethiol (308 mu l), zinc stearate (379 mg) and diphenyl ether (20 ml) were heated rapidly to 225 degrees C. Over the course of 60 minutes a number of 0.25ml portions of the reaction mixture were removed and diluted with cyclohexane (3 ml) and any insoluble materials were removed using a centrifuge. The resulting clear solutions was further purified to remove any soluble impurities by adding them drop wise to a 1:1 mixture of isopropanol and methanol (30 ml) to precipitate the nanocrystals which is recovered using a centrifuge. The resulting solids are redissolved in cyclohexaneto the high quantum yield of nitride nanostructures. The photoluminescence quantum yield of the sample removed from this reaction was 18.5%.