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Method for converting nanowires into quantum dots and prepared quantum dots

A technology of nanowires and quantum dots, applied in the field of quantum dots, can solve the problems such as difficulty in realizing large-scale production, complex preparation process of quantum dots, uneven particle size of quantum dots, etc., and achieves good application prospects, high yield, and particle size. uniform effect

Pending Publication Date: 2019-06-18
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a method for converting nanowires into quantum dots and the prepared quantum dots. The method can effectively solve the problems of complex preparation process, high cost and difficulty in large-scale production of quantum dots in the prior art. The problem of uneven particle size of the obtained quantum dots

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  • Method for converting nanowires into quantum dots and prepared quantum dots
  • Method for converting nanowires into quantum dots and prepared quantum dots
  • Method for converting nanowires into quantum dots and prepared quantum dots

Examples

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Embodiment 1

[0063] Mix 1g of silver nanowires with a diameter of 200nm and a length of about 30μm, 10g of sodium chloride and 10g of agate balls with a diameter of 0.5mm, and ball mill for 0.5h. The agate balls were then separated, and the resulting sample was washed with water several times until the sodium chloride was completely washed out. After drying, N-methylpyrrolidone (NMP) was added to form a 1 mg / mL dispersion, which was sonicated for 120 h at an ultrasonic power of 50 W. Vacuum filtration is performed on the sample after ultrasonication, and the NMP dispersion of silver quantum dots is obtained by passing through a filter membrane with a pore size of 0.02 μm.

[0064] figure 1 It is the scanning electron micrograph of silver nanowire in embodiment 1; figure 2 For the silver quantum dot NMP dispersion liquid prepared by embodiment 1 is dropped on the copper grid, and the solvent is completely volatilized, and the transmission electron microscope photo obtained by transmissio...

Embodiment 2

[0066] The difference from Example 1 is that silver nanowires are replaced by iron nanowires to obtain an NMP dispersion of iron quantum dots.

Embodiment 3

[0068] The difference from Example 1 is that the ball milling time is 3h, and the ultrasonic time is 10h.

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Abstract

The invention relates to a method for converting nanowires into quantum dots and the prepared quantum dots. The method comprises the following steps: (1) mixing the nanowires and a grinding aid material to obtain a mixed crude product; and (2) dispersing the mixed crude product in step (1) in a solvent, and carrying out ultrasonic treatment to obtain the quantum dots. The preparation method has the advantages of high efficiency, environmental friendliness, simplicity in operation, low cost and the like, is suitable for large-scale production, and has good application prospect; and the preparedquantum dots are high in purity, high in yield, uniform in particle size and controllable in size.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for converting nanowires into quantum dots and the prepared quantum dots. Background technique [0002] Nanowire is a one-dimensional structure whose lateral size is at the nanoscale and vertically unlimited. According to the different materials, it can be divided into metal nanowires, semiconductor nanowires and insulator nanowires. Because of its unique thermal, optical, electrical and magnetic properties, it has a wide range of applications in the fields of microprocessors, micro sensors, new optoelectronic devices and information storage. Quantum dots are a zero-dimensional nanostructure, generally considered to be nanoparticles with a particle size of less than 20nm. Due to its large specific surface area, more prominent quantum confinement effect, quantum size effect and macroscopic tunnel effect, it has potential application value in ...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F1/00C01G21/21B82Y30/00B82Y40/00
Inventor 张勇徐元清马艳红
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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