Patent ID: 8822955

Claim:
A quantum dot comprising: an inorganic core; and a shell, wherein the shell comprises a polymer conjugated to the inorganic core, the polymer comprising a first monomer unit represented by formula I and a second monomer unit represented by formula II: wherein R 1 , R 2 , R 3 , and R 4 are each independently selected from the group consisting of hydrogen, R 9 , C 1-6 alkyl, and C 1-6 alkyl substituted with one or more of R 9 , provided that at least one of R 1 , R 2 , R 3 , and R 4 is R 9 or C 1-6 alkyl substituted with one of or more of R 9 ; wherein each R 9 is independently represented by formula III: wherein R 10 is independently selected from the group consisting of hydrogen, C 1-6 alkyl, and C 1-6 alkyl substituted with one or more hydroxyl; wherein each R 11 is independently selected from the group consisting of hydrogen, methyl, and combinations thereof; wherein n is from 0 to 200; wherein R 5 , R 6 , R 7 , and R 8 are each independently selected from the group consisting of hydrogen, R 12 , C 1-6 alkyl, and C 1-6 alkyl substituted with one or more of R 12 , provided that at least one of R 5 , R 6 , R 7 , and R 8 is R 12 or C 1-6 alkyl substituted with one or more of R 12 ; wherein each R 12 is independently represented by formula IV: wherein each X 1 is —C 1-6 alkylene-; and wherein the molar ratio of R 9 to R 12 substitutions in the polymer is in the range of about 94:6 to about 75:25.