One-pot method for preparing core-shell nanocrystals
AssigneeMassachusetts Institute of Technology
InventorsZhengtao Deng, Tian Ming, He Dong, Aishuang Xiang, Jing Kong
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Abstract
A method for preparing a core-shell nanocrystal can include mixing an M-containing precursor solution, an X-containing precursor solution, and an acid or alcohol in an inert atmosphere at a first temperature to form a reaction mixture; maintaining the reaction mixture at the first temperature to grow the MX core of the nanocrystal; raising the temperature of the reaction mixture to a second temperature; and maintaining the reaction mixture at the second temperature to grow a shell of the nanocrystal.
Claims27
A method for preparing a core-shell nanocrystal comprising:
- mixing an M-containing precursor solution, an X-containing precursor solution, and an acid or alcohol in an inert atmosphere at a first temperature to form a reaction mixture;
- maintaining the reaction mixture at the first temperature to grow an MX semiconductor crystalline core of the nanocrystal;
- raising the temperature of the reaction mixture to a second temperature;
- and
- maintaining the reaction mixture at the second temperature to grow a semiconductor crystalline shell of the nanocrystal for a period of between 5 to 120 minutes.
A method of preparing a core-shell nanocrystal comprising:
- forming a reaction mixture containing a first group II (M1) precursor, a second group II precursor (M2), a first group VI precursor (X1), and an acid or alcohol including a second group VI material (X2);
- maintaining the reaction mixture at a first temperature to grow the M1X1 core of the nanocrystal;
- raising the temperature of the reaction mixture to a second temperature;
- and
- maintaining the reaction mixture at the second temperature to grow a M2X2 shell of the nanocrystal for a period of between 5 to 120 minutes.
Dependencies are inferred from the claim text.