A Method for Lossless Droplet Transfer by Controlling the Temperature of a Superhydrophobic Metal Substrate

Abstract

The invention discloses a method for realizing nondestructive transfer of a liquid drop through controlling the temperatures of super-hydrophobic metal bases. The method comprises the following steps: producing two super-hydrophobic metal bases in advance, horizontally placing one of the two super-hydrophobic metal bases, which is used for supporting 1-20 [mu]L of the liquid drop, at room temperature, heating the other one of the two super-hydrophobic metal bases to 30-90 DEG C, keeping the temperature of the one super-hydrophobic metal base higher than 30 DEG C before the one super-hydrophobic metal base is in contact with the liquid drop, slowly moving the heated super-hydrophobic metal base to the liquid drop in a vertical direction, allowing the super-hydrophobic surface of the heated super-hydrophobic metal base to be in gentle contact with the liquid drop, and slowly uplifting the heated super-hydrophobic metal base to make the liquid drop be adhered to the surface and complete grabbing motion in order to realize water drop transfer. The method has the advantages of simple device, easiness in operation, good safety, good stability, good adaptability, and realization of nondestructive transfer of the liquid drop.

Description

technical field [0001] The invention relates to a method for non-destructive transfer of liquid droplets, in particular to a method for realizing non-destructive transfer of liquid droplets by controlling the temperature of a superhydrophobic metal substrate. Background technique [0002] The non-destructive transfer technology of micro-droplets is one of the focal issues in the field of microfluidic control. It has important practical application value in biomedical detection, micro-drug capture and release, and microfluidic manipulation. [0003] At present, the non-destructive transfer technology for micro-droplets is divided into in-situ control method and ex-situ control method. The in-situ control method refers to directly changing the adhesion force of the actuator itself to the liquid under the action of external drives (such as temperature, electric field, magnetic field, deformation, etc.), so as to realize the grasping and releasing of the liquid droplets by the a...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings that the in-situ control method requires a complicated driving device and the ex-situ control method requires two different adhesive substrates to realize the transfer process, it is proposed to change the adhesion of only one super-hydrophobic metal substrate by controlling the temperature to complete droplet transfer

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