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

A technology of surface charge and electrostatic copying, which is applied in the electric recording process applying charge pattern, the equipment of electric recording process applying charge pattern, electric recording technique, etc. It can solve the problems of high cost requirement, hidden safety hazard, complicated equipment structure, etc. , to achieve the effect of low equipment requirements, low production cost and simple equipment

Inactive Publication Date: 2019-10-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method specifically related to preparing a charged path based on surface charge printing, performing biological droplet transport, electrostatic printing and micro-nano self-assembly, and more specifically relates to a method based on surface charge printing to prepare a charged path with a charge density gradient. The method of path, the method of preparing charged path with charge density gradient based on surface charge printing for biological droplet transport, and the method of electrostatic printing and micro-nano self-assembly based on surface charge printing, in order to solve the problem of existing surface charge Generated by an external power supply, resulting in the use of existing surface charges in the fields of biological fluid transmission, electrostatic printing and self-assembly of micro-nano materials, resulting in complex structures and high cost requirements for the equipment used, and there are also safety hazards.

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The method for preparing a charged path with a charge density gradient based on surface charge printing in this embodiment includes the following steps:

[0044] The material with the superhydrophobic surface is placed on a mobile platform with an inclination angle of 10°, and the material moves horizontally at a speed of 3 mm / s on the mobile platform, and the moving distance of the material is 60 mm.

[0045] Use a droplet needle to drip water on the superhydrophobic surface of the material. The angle between the direction of the droplet and the surface of the material is 5°. The diameter of the droplet is 500 μm, and the initial velocity of the droplet is 50 m / s. The initial drop height of the droplet dropped by the droplet needle is 50 mm, and the droplet needle is moved vertically at a speed of 1 mm / s to reach the end drop height of 80 mm, and the impact height difference is 30 mm. During this period, the water drop rate is 2 drops / s.

[0046] A charged path with a...

Embodiment 2

[0048] The method of preparing a charging path with a charge density gradient based on surface charge printing in this embodiment is the same as that in Embodiment 1, except that in this embodiment, the included angle between the direction of the water drop and the surface of the material is 10°, and the diameter of the water drop is 800 μm. , The initial velocity of water droplet is 40m / s.

[0049] A charged path with a charge density gradient with a length of 57 mm and a width of 900 μm was printed on the superhydrophobic surface of the material, and the surface potential of the charged path was -2850v to -980v.

Embodiment 3

[0051] The method for preparing a charging path with a charge density gradient based on surface charge printing in this embodiment is the same as that in Embodiment 1, except that in this embodiment, the included angle between the direction of the water drop and the surface of the material is 15°, and the diameter of the water drop is 1 mm. , The initial velocity of water droplet is 30m / s.

[0052] A charged path with a charge density gradient with a length of 47mm and a width of 1.1mm was printed on the superhydrophobic surface of the material, and the surface potential of the charged path was -3000v to -1000v.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/00
CPCG03G15/00
Inventor 邓旭孙强强周昱
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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