Method of synthesizing colloidal nanocrystals
AssigneeNational Research Council of Canada
InventorsKui Yu, John Ripmeester
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Abstract
A method of making nanocrystals involves adding a chalocogen source to a hot solution of a metal-containing non-organometallic compound, such as CdO, in a first ligand solvent, such as TOP, and preferably subsequently cooling the resulting mixture to a lower temperature to grow the nanocrystals at said lower temperature. The method can involve either one ligand or two-ligand systems.
Claims34
A method of making nanocrystals comprising:
- preparing at least one chalocogen source consisting essentially of a complex of a chalcogen and a ligand solvent in a solution thereof,
- preparing at least one cation source consisting essentially of a complex of a non-organometallic metal precursor compound and a ligand solvent in a solution thereof;
- and
- subsequently adding said at least one chalcogen source to at least one said metal precursor to grow said nanocrystals.
A method of making nanocrystals comprising:
- preparing at least one solution of a complex of a chalcogen and a ligand solvent in said ligand solvent;
- preparing a hot solution of at least one complex of a metal-containing non-organometallic compound in said ligand solvent or another ligand solvent;
- adding said at least one solution of said complex of said chalcogen to said hot solution of said metal-containing non-organometallic compound;
- lowering the temperature of the resulting mixture;
- and
- growing said nanoscrystals at said lower temperature.
Single-(surface) or Two-(surface) ligand nanocrystals of the form MX where M is metal selected from the group consisting of:
- Cd, Zn, Mg, Hg, Cu, Ag, Ni, Co, Fe, Mn, Ti, Zr, Al, Ga, In, Sn, Pb and X is an element selected from the group consisting of:
- S, Se, Te.
Nanocrystal structures comprising a core of the form MX, where M is Cd, Zn, Mg, Hg, Cu, Ag, Ni, Co, Fe, Mn, Ti, Zr, Al, Ga, In, Sn, Pb and X is an element selected from the group consisting of:
- S, Se, Te, and one or more outer shells of the form MX, where at least one of M or X is different for the or each shell.
Nanocrystal structures of the form MNX, where M N are different elements selected from the group consisting of Cd, Zn, Mg, Hg, Cu, Ag, Ni, Co, Fe, Mn, Ti, Zr, Al, Ga, In, Sn, Pb and X is selected from the group consisting of S, Se, Te.
Dependencies are inferred from the claim text.