Non-destructive transfer droplet surface and preparation method and non-destructive transfer droplet method

Abstract

The invention discloses a non-destructive transfer liquid droplet surface, a preparation method and a non-destructive transfer liquid drop method, and relates to the technical field of liquid droplet transfer. A plurality of microplates are sequentially arranged on the surface of a substrate, and each microplate is provided with A plurality of grooves, and a plurality of protrusions are provided on the surface of the other side, and one end of each protrusion extends to the top surface of the micro-plate where it is located. Each micro-plate is an elastic micro-plate, and each micro-plate is Under the action, it can swing synchronously between the first position and the second position. The first position is the position when the microplate is perpendicular to the substrate surface, and the second position is the position when the microplate swings from the first position to the groove on the surface. The non-destructive transfer droplet surface and preparation method and the non-destructive transfer droplet method provided by the present invention can freely grab and release the droplet and realize the non-destructive transfer of the droplet.

Description

technical field [0001] The invention relates to the technical field of droplet transfer, in particular to a non-destructive transfer droplet surface, a preparation method and a non-destructive transfer droplet method. Background technique [0002] After long-term evolution, organisms in nature coordinate and complement each other in structure and function, and exhibit a variety of special surface-wetting properties. For example, the superhydrophobic self-cleaning of the lotus leaf surface, the superhydrophobic high adhesion characteristics of the rose petal surface, etc. The common features of these special wetting properties are all realized by the assembly of multi-level micro-nano structures constituting the surface. Therefore, by designing and preparing multi-level microstructure arrays with different morphologies on the surface of materials, endowing them with special surface wetting properties has attracted widespread attention of researchers. [0003] The research o...

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Problems solved by technology

[0005] In the prior art, carbon nanotubes have been used to prepare a surface with an adhesion force of 59.8 μN. The surface has more than 6,000,000 carbon nanotubes per square millimeter. When this surface transfers droplets, it can only transfer droplets To a surface with stronger adhesion, the free grasping and release of droplets by the surface cannot be achieved

In the prior art, magnetic particles and polymers are also used to prepare a magnetic film. Under the action of a magnetic field, an irregular microstructure is formed on the surface of the film. By adjusting the geometric size of the microstructure, the droplet adhesion can be between 30μN and 120μN. Switching between them, using this change of adhesion force, can realize the grabbing and releasing of droplets, but this kind of surface will cause the loss of 3% of the droplets during the transfer of droplets, which is easy to cause energy waste or waste in practical applications. surface contamination

From the above analysis, it can be seen that the existing surfaces that can be used to transfer droplets cannot achieve lossless transfer of droplets.

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