TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The inorganic oxide precursor is at least one compound selected from metal salts, metal chelates and organo-metallic compounds of silicon (Si), aluminum (Al), titanium (Ti), and zirconium (Zr). The inorganic oxide precursor comprises an alkoxy silane. The core-shell nanoparticles further comprises a functional compound. The binder is at least one inorganic oxide precursor selected from metal salts, metal chelates and organo-metallic compounds of Si, Al, Ti, and Zr.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The colloidal organic particles are provided by dispersing the synthetic polyampholyte in an aqueous medium, and adjusting particle size by changing both pH and temperature. Preferred Components: The colloidal organic particles have average particle size of 20-200 nm as measured by dynamic light scattering (DLS). The colloidal organic particles consist of synthetic polyampholyte, water, and organic solvent.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polyampholyte is a copolymer obtained from at least one cationic or basic monomer (M1) including compounds with a pending group that can combine with a proton, like monomers with a tertiary amine group; at least one anionic or acidic monomer (M2) including compounds with a pending group that can yield a proton, like monomers containing carboxylic acid groups; at least one neutral or non-ionic monomer (M3); and optionally at least one cross-linking monomer (M4). The polyampholyte is a cationic copolymer obtained from 5-40 mole% of at least one monomer M1; 0.5-20 mole% of at least one monomer M2; 38-94.5 mole% of at least one monomer M3; and 0-2 mole% of at least one monomer M4. The polyampholyte is a cationic copolymer obtained from 8-20 mole% of at least one monomer M1 selected from amino-functional (meth)acrylates and (meth)acrylamides; 1-4 mole% of at least one monomer M2 selected from (meth)acrylic monomers with a carboxylic acid group; and 76-91 mole% of at least one monomer M3 selected from 1-18C alkyl (meth)acrylates. ACTIVITY - None given.    MECHANISM OF ACTION - None given.    EXAMPLE - A dispersion (PA3) comprising N,N-dimethylaminoethyl methacrylate (DMAEMA) (8.1 mole%); methacrylic acid (MAA) (2 mole%); and methyl methacrylate (MMA) (89.9 mole%) was prepared, where z-average particle size was 25 nm; and polydispersity (PDI) was 0.1. Silica precursor was added to the PA3 dispersion, and the colloidal dispersion obtained was then used to make coating compositions, and subsequently to make coated glass substrates. 425 g of PA3 dispersion (about 20% solids in water of pH 4) was diluted with 3835 g of water in a conical 5 l flask equipped with 8 cm magnetic stirring bar. After dilution the dynamic light scattering (DLS) z-average particle size was 25.6 nm, zeta-potential was +25 mV, and pH was 4.1. 300 g Tetramethoxysilane (TMOS) was then added in about 5 minutes under stirring at 21-25 degrees C. After 24 hours of stirring, particle size measured was 28.5 nm, zeta-potential was +12 mV, and pH was 3.8. From these changes formation of a silicon-containing shell on the polyampholyte particles resulting in core-shell particles was concluded. The calculated mass ratio of SiO2 (resulting from TMOS) to polyampholyte was 1.39.