“…The surfaces of particles can be altered by coating them with other materials for improving properties such as adhesion, hydrophobicity, hydrophilicity, printability, corrosion resistance, etc. The specific and broad spectrum of applications of coated particles includes ͑but is not limited to͒ removal of metal ions from water using ZnO particles coated with an acrylic film; 1 photocatalyst for water decontamination using glass spheres coated with TiO 2 ; 2,3 reinforcing materials, e.g., SiC particles coated with metallic nickel and copper, for aluminum-based metal matrix composites; 4,5 pharmaceutical dosage, e.g., microcapsule coated with composite latex membrane; 6 field emission display technology in the area of flat-panel displays using silica particles coated with phosphor; 7 superparamagnetism application of magnemite particles coated with polymethacrylic acid; 8,9 abrasives formed by diamond growth on Si and SiO 2 particles; 10 ferromagnetic iron particles coated with aluminum for toner for color copying machines; 11 solid fuels for combustors, e.g., aluminum nanoparticles coated with carbon; 12 improving flowability and decreasing wettability of food thickening agent cornstarch and food additive microcrystalline cellulose by coating with silica; 13 increasing the humidity resistance of magnesium particles used in flares and tracer bullets by coating with silica and wax; 13 and increasing weather durability of TiO 2 pigment, in paint, by coating TiO 2 particles with silica. 14 The possibility of many techniques, combinations of particle and coating materials, and range of operating conditions make the physicochemical phenomena of coating complex.…”