Quantum dot solution purification method and purification system

Abstract

The invention discloses a quantum dot solution purification method. A micro-vortex generator is arranged, so that a quantum dot solution generates micro-vortex under the action of the micro-vortex generator when flowing through the micro-vortex generator, and larger particle impurities in the quantum dot solution are precipitated under the action of the micro-vortex. The invention also provides a quantum dot solution purification system for realizing the quantum dot solution purification method, wherein the system comprises a micro-vortex generator, and the micro-vortex generator comprises a bulk acoustic wave resonator and a micro-channel for enabling flowing liquid to generate micro-vortex; and the bulk acoustic wave resonator generates high-frequency acoustic waves, the high-frequency acoustic waves excite the quantum dot solution in the micro-channel to flow, and micro-vortexes are formed under the action of the micro-channel. The method is convenient, fast, low in cost and suitable for purification of various quantum dot solutions, and the flow velocity and diameter of the micro-vortex are adjusted according to the equivalent diameter of large particle impurities in the quantum dot solution.

Description

technical field [0001] The invention relates to a quantum dot purification method, in particular to a quantum dot solution purification method and a purification system. Background technique [0002] In recent years, quantum dots have become a research hotspot due to their unique photoluminescence and fluorescence stability properties. In recent years, the preparation of uniformly sized nanoparticles has attracted extensive attention. Monodisperse quantum dot solutions can link the physical and chemical properties of quantum dots with size and shape, greatly improving the repeatability and reliability of experiments. At present, in the existing synthesis methods, there are plans to use nano-scale filters such as molecular sieves to remove larger particulate impurities. Such solutions require expensive nano-scale filters, and the frequent replacement of filters during use greatly increases the experimental cost; there is also a plan to use dialysis, but the dialysis process...

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Problems solved by technology

At present, in the existing synthesis methods, there are plans to use nano-scale filters such as molecular sieves to remove larger particulate impurities. Such solutions require expensive nano-scale filters, and the frequent replacement of filters during use greatly increases the experimental cost; there is also a plan to use dialysis, but the dialysis process requires a long time to rely on free diffusion, and the subsequent concentration process needs to be added; in addition, there is also a narrow size distribution synthesis plan designed for a specific quantum dot, but It is more complicated than the general synthesis scheme, and it is difficult to be extended to the synthesis of other quantum dots

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