Block copolymer nanoparticle compositions

A display device comprising a block copolymer-nanoparticle composition comprising:

• a nanoparticle having bound thereto a copolymer, the copolymer comprising:
• a first block unit that comprises repeating units of a monomer comprising a binding group that is bound to the nanoparticle;
• a second block unit that comprises repeating units of a monomer comprising a hydrophobic moiety that provides steric stabilization of the nanoparticle and homogeneity of mixtures of the copolymer-nanoparticle composition in a non-polar medium;
• and
• a third block unit that comprises repeating units of a monomer comprising a chargeable group that imparts a charge to the nanoparticle,
• wherein an order of the respective block units in the copolymer and a number of the repeating units of the monomer in the respective block units control the stability, the homogeneity of mixtures and the charge of the nanoparticle in a non-polar medium.

A device comprising:

• (a) at least two conductive plates, wherein the conductive plates are separately activatable by one or more voltage sources;
• and
• (b) a block copolymer-nanoparticle composition in a non-polar medium between the conductive plates, wherein the block copolymer-nanoparticle composition comprises:
• nanoparticles each having bound thereto one or more copolymers, the copolymer comprising:
• a first block unit that comprises repeating units of a monomer comprising a binding group that is bound to the nanoparticle;
• a second block unit that comprises repeating units of a monomer comprising a hydrophobic moiety that provides steric stabilization of the nanoparticle and homogeneity of mixtures of the polymer-nanoparticle composition in the non-polar medium;
• and
• a third block unit that comprises repeating units of a monomer comprising a chargeable group that imparts a charge to the nanoparticle,
• wherein an order of the respective block units in the copolymer and a number of the repeating units of the monomer in the respective block units control the stability, the homogeneity of mixtures and the charge of the nanoparticle in the non-polar medium.