TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The coating composition comprises a silane binder, indium-tin oxide, magnesium fluoride and/or barium sulfate nanoparticles and a solvent, where the weight ratio of nanoparticles to binder is greater than 1:1. Preferred Components: The nanoparticles are: indium-tin oxide, barium sulfate, magnesium fluoride (all preferred), calcium carbonate and/or strontium carbonate; and indium-tin oxide or its mixture. The silane binder is alkoxysilane compounds, preferably alkoxysilanes having a glycidyl or methacrylyl group or trifunctional alkoxysilanes having a glycidyl or methacrylyl group, preferably 3-glycidoxy propyl trimethoxysilane and 3-methacryloxy propyl trimethoxysilane. The antireflective coatings comprise indium-tin oxide nanoparticles. Preferred Method: The subsequent treatment is carried out: by radiation, preferably UV radiation, near infrared radiation (0,76-2,5 mu m) or infrared radiation (2,5-100 mu m); and at an elevated temperature of 65-360 (preferably 75-315) degrees C.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The coating composition comprises: 20-50 (preferably 24-35) wt.% of nanoparticles; less than 40 (preferably 1-10) wt.% of binder; a dispersing agent, preferably 3,6,9-trioxadecanoic acid; and at least 20 (preferably 25-35) wt.% of nanoparticles. Preferred Components: The weight ratio of nanoparticles to binder is present in an amount of 1:1-20:1 (preferably 3:1-13:1). The binder is: crosslinkable phenolic resins, bismaleimide resins, vinyl ether resins, aminoplast resins having pendant alpha, beta unsaturated carbonyl groups, urethane resins, polyvinylpyrrolidones, epoxy resins, (meth)acrylate resins, (meth)acrylated isocyanurate resins, urea-formaldehyde resins, isocyanurate resins, (meth)acrylated urethane resins, (meth)acrylated epoxy resins, acrylic emulsions, butadiene emulsions, polyvinyl ester dispersions, styrene/butadiene latexes, silanes, siloxanes, silicates and/or hydrolyzates; and 3-glycidoxy propyl trimethoxysilane or 3-methacryloxy propyl trimethoxysilane and silicon tetraethoxide. The nanoparticles are alkaline metal fluorides, alkaline earth metal fluorides, alkaline earth metal sulfates, alkaline earth metal carbonates and metal oxides (all preferred), halides of alkaline and alkaline earth metals and/or non-metal oxides. EXAMPLE - Powdered magnesium fluoride was mixed with isopropyl ether and methacryloxypropyltrimethoxysilane. A trixoydecanoic acid was added to the mixture. The mixture was stirred for 10 minutes at room temperature. Water was added drop wise and the resulting mixture was further stirred and heated to 80 degrees C for 3 hours. The obtained mixture was filtered using a microfilter to give a coating composition.