Method for preparing charged path based on surface charge printing and performing biological droplet transfer, electrostatic copying and micro-nano self-assembly

Abstract

The invention discloses a method for preparing a charged path based on surface charge printing and performing biological droplet transfer, electrostatic copying and micro-nano self-assembly, which belongs to the technical field of numerical control printing systems. The method comprises the steps that a material with super-hydrophobic properties is placed on a moving platform, and a micro-dropletnozzle is used to drip water onto the super-hydrophobic surface of the material; the drip height of the droplet nozzle and the moving path of the platform are simultaneously controlled to print the charged path with a charge density gradient on the surface of the material. Bio-liquid transfer is performed by using the formed charged path with the charge density gradient, and electrostatic copyingand micro-nano self-assembly are performed based on surface charge printing. According to the invention, water droplets are used to impinge and contact the material with the superhydrophobic surface to electrify the material; the charged path with the charge density gradient is printed by controlling the water droplet ejection height and the platform moving path, which is simple in operation, simple in equipment and low in cost; and the entire printing process does not require an external power supply, which prevents security risks.

Description

technical field

[0001] The invention relates to the technical field of numerical control printing systems, in particular to a method for preparing charged paths based on surface charge printing, performing biological liquid droplet transmission, electrostatic printing and micro-nano self-assembly, and more specifically relates to a method for preparing a method with charge density based on surface charge printing. A gradient charged path method, a method for preparing a charged path with a charge density gradient based on surface charge printing for biological droplet transport, and a method for electrostatic printing and micro-nano self-assembly based on surface charge printing. Background technique

[0002] In the field of microfluidics and bioanalysis for biological liquid transport applications, the generation of its surface charge mainly depends on an external power supply, and the charge generated by the external power supply is applied to the biological liquid to conve...

Images