Core-shell structure nanocrystal and preparation method thereof
A nanocrystal and shell structure technology, applied in nanotechnology, nanooptics, nanotechnology, etc., can solve the problems of low fluorescence quantum efficiency of nanocrystals, and achieve the effect of high luminous efficiency
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0030] In another typical embodiment of the present application, a method for preparing nanocrystals with a core-shell structure is provided, including the following process: Step 1, preparing nanocrystal cores in the oil phase; step 2, adding The first zinc precursor, the Zn element in the first zinc precursor exchanges the Ag element in the nanocrystal core by cations, and obtains the Zn-doped first shell layer coated on the outside of the nanocrystal core; step 3, in the first shell The outer layer is covered with the second shell layer; wherein, the composition of the nanocrystalline core is Ag 2 S, the composition of the first shell is Zn x Ag 2(1-x) S, the composition of the second shell layer is ZnS, where 0<x<1.
[0031] Step 1 is the preparation process of the nanocrystalline core, compared to the aqueous phase synthesis of Ag 2 S nanocrystal nuclei, the oil phase can provide a higher reaction temperature, thereby increasing the nucleation rate and crystallinity of...
Embodiment 1
[0050] (1) Step 1: Prepare nanocrystalline nuclei in the oil phase:
[0051] Add 170 mg of silver nitrate, 1 ml of oleic acid, 10 ml of n-dodecanethiol, and 30 ml of octadecene into a 100 ml three-necked flask, stir and remove water and oxygen to form a solution containing Ag ions.
[0052] Mix the S powder with the oleylamine solution, stir to dissolve the S powder, and obtain a S precursor solution with a concentration of 1M. At 130 degrees Celsius, 500 microliters of S precursor solution was hot injected into the solution containing Ag ions, and reacted for 10 minutes to obtain Ag 2 S nanocrystalline core.
[0053] (2) Step 2: Diethyl zinc and octadecene were mixed to obtain a diethyl zinc octadecene solution with a concentration of 1M. At 130 °C, hot inject 0.2 ml of diethyl zinc octadecene solution into the Ag 2 In the solution of S nanocrystal nuclei, react for 30min, and get coated in Ag 2 Zn outside the core of S nanocrystals x Ag 2(1-x) S first shell.
[0054] ...
Embodiment 2
[0056] (1) Step 1: Prepare nanocrystalline nuclei in the oil phase:
[0057] Add 170 mg of silver nitrate, 1 ml of oleic acid, 10 ml of n-dodecanethiol, and 30 ml of octadecene into a 100 ml three-necked flask, stir and remove water and oxygen to form a solution containing Ag ions.
[0058] Mix the S powder with the oleylamine solution, stir to dissolve the S powder, and obtain a S precursor solution with a concentration of 1M. At 130 degrees Celsius, 500 microliters of S precursor solution was hot injected into the solution containing Ag ions, and reacted for 10 minutes to obtain Ag 2 S nanocrystalline core.
[0059] (2) Step 2: Diethyl zinc and octadecene were mixed to obtain a diethyl zinc octadecene solution with a concentration of 1M. At 140 °C, hot inject 0.2 ml of diethyl zinc octadecene solution into the Ag 2 In the solution of S nanocrystal nuclei, react for 30min, and get coated in Ag 2 Zn outside the core of S nanocrystals x Ag 2(1-x) S first shell.
[0060] ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| size | aaaaa | aaaaa |
| size | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More