Semiconductor nanoparticle capping agents
AssigneeNanoco Technologies Ltd.
InventorsMark C. McCairn, Steven M. Daniels, Siobhan Cummins, Nigel Pickett
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Abstract
Embodiments of the invention involve semiconductor nanoparticle capping ligands, their production and use. Ligands may have the formula with m ranging from approximately 8 to approximately 45. An embodiment provides a method of forming a compound of the formula including the steps of providing a first starting material comprising poly(ethyleneglycol) and reacting the first starting material with a second starting material comprising a functional group for chelating to the surface of a nanoparticle to thereby form the compound.
Claims13
A method for producing capped nanoparticles comprising capping at least one nanoparticle with a compound of formula XO—(CH2CH2O)m—Y, wherein X is selected from the group consisting of H, CH3, and —CH2CO2H, Y is selected from the group consisting of p-toluene sulphonate, carboxyl, —CH2CO2H, -PhCO2H, —SiPh2tBu, phenyl, —CH2Ph and phthalamide, and m is an integer, and wherein the capping comprises exchanging at least some existing ligands coating the nanoparticle for the compound of formula XO—(CH2CH2)m—Y.
A method for producing capped nanoparticles comprising capping at least one nanoparticle with a compound of formula XO—(CH2CH2O)m—Y wherein X is selected from the group consisting of H, CH3, and —CH2CO2H, Y is selected from the group consisting of p-toluene sulphonate, carboxyl, —CH2CO2H, -PhCO2H, —SiPh2tBu, phenyl, —CH2Ph and phthalamide, and m is an integer, wherein capping comprises interchelating the compound of formula XO—(CH2CH2O)m—Y into existing ligands coating the nanoparticle.
A method of producing capped nanoparticles, the method comprising:
- forming a compound of the formula
- XO—(CH2CH2O)m—Y
- wherein X is selected from the group consisting of H, CH3, and —CH2CO2H, Y is selected from the group consisting of p-toluene sulphonate, carboxyl, —CH2CO2H, -PhCO2H, —SiPh2tBu, phenyl, —CH2Ph and phthalamide and m is an integer, by:
- providing a first starting material comprising poly(ethyleneglycol) and a terminal hydroxyl group;
- reacting the first starting material with a second starting material comprising a leaving group and a functional group for chelating to the surface of a nanoparticle thereby detaching the leaving group and forming the compound;
- and
- capping at least one nanoparticle with a compound of formula XO—(CH2CH2O)m—Y.
Nanoparticles capped with a compound of formula
- XO—(CH2CH2O)m—Y
- wherein X is selected from the group consisting of H, CH3, and —CH2CO2H, Y is selected from the group consisting of p-toluene sulphonate, carboxyl, —CH2CO2H, -PhCO2H, —SiPh2tBu, phenyl, —CH2Ph and phthalamide and m is an integer, and wherein at least one of the nanoparticles comprises a semiconductor material selected from one or more of the group of semiconductor materials consisting of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, InP, InAs, InSb, AlP, Al2S3, AlAs, AlSb, GaN, GaP, GaAs, GaSb, PbS, PbSe, Si, and Ge.
Dependencies are inferred from the claim text.