| 摘要 |
A nanoparticle has a semiconductor nanocrystal capable of emitting light. The nanoparticle further includes a ligand attached to a surface of the coating. The ligand is represented by the formula: X-Sp-Z, wherein X represents, e.g., a primary amine group, a secondary amine group, a urea, a thiourea, an imidizole group, an amide group, a phosphonic or arsonic acid group, a phosphinic or arsinic acid group, a phosphate or arsenate group, a phosphine or arsine oxide group; Sp represents a spacer group, such as a group capable of allowing a transfer of charge or an insulating group; and Z represents: (i) reactive group capable of communicating specific chemical properties to the nanocrystal as well as provide specific chemical reactivity to the surface of the nanocrystal, and/or (ii) a group that is cyclic, halogenated, or polar a-protic. |
| 主权项 |
1. A nanoparticle comprising a semiconductor nanocrystal capable of emitting light, the nanoparticle including one or more chemically distinct native ligands attached to a surface thereof, at least one of said ligands being represented by the formula:
X-Sp-Zwherein X represents a phosphonic acid group; Sp represents a spacer group comprising a group capable of allowing a transfer of charge or an insulating group; and Z represents: (i) a reactive group capable of communicating specific chemical properties to the nanoparticle as well as provide specific chemical reactivity to the surface of the nanoparticle, and/or (ii) a group that is cyclic, halogenated, and/or polar a-protic, wherein Z in all cases is not reactive upon exposure to light, and wherein a native ligand is a ligand that attaches or coordinates to the nanoparticle surface during the growth thereof or overcoating thereof with an overcoating material comprising a semiconductor material. |
