Surface anisotropic topography processing method based on electronic dynamic regulation

Abstract

The invention relates to a surface anisotropic morphology processing method based on electronic dynamic regulation, and belongs to the field of functional surface application. The effect that laser can vertically irradiate to the surface of a horizontally arranged sample is guaranteed. A slit is arranged in the position where a light path passes; the position of the slit is regulated; the width of the slit is regulated to the needed size; and the effect that the laser vertically passes through the center of the slit is guaranteed. The major-minor axis ratio of anisotropic morphology can be continuously adjusted through the width of the slit. Processing of the surface anisotropic micro-nano composite structure of materials is realized through a spatial light shaping method, so that the process of building an anisotropic structure is simplified, the surface anisotropic morphology processing method is suitable for various materials, and the major-minor axis ratio of the anisotropic structure is changed continuously by adjusting the width of the slit. The parameters such as the number of pulses, energy and the processing period are changed furthermore so that controllable changes of the anisotropic wetting property can be realized after large-area processing, and the simple, controllable and efficient processing method is provided for the anisotropic wetting property.

Description

technical field

[0001] The invention relates to a method for processing anisotropic surface topography based on electronic dynamic control, belonging to the field of functional surface applications. Background technique

[0002] Surfaces with anisotropic wetting properties can realize directional sliding of droplets, and have a wide range of applications in the fields of microfluidic channels, biosensors, and droplet directional transport. In order to achieve anisotropic wetting characteristics, it is necessary to construct a surface with anisotropic morphology, and specific processing methods include chemical vapor deposition, photolithography, and interferometry. The research group of Jilin University (Wang S, Wang T, Ge P, et al. Controlling Flow Behavior of Water in Microfluidics with a Chemically Patterned Anisotropic Wetting Surface. Langmuir, 2015) used chemical vapor deposition and chemical etching to obtain a hydrophilic / The substrate of the hydrophobic stripe str...

Examples

Embodiment 1

[0018] The method of surface anisotropic topography processing based on electronic dynamic control, the specific steps are as follows:

[0019] Step 1: Adjust the optical path of the femtosecond laser system to ensure that the laser can be vertically incident on the surface of the sample placed horizontally;

[0020] Step 2: Place the slit where the light path passes, adjust the position of the slit, and adjust the width of the slit to the desired size to ensure that the laser passes through the center of the slit vertically; the smaller the slit width, the more anisotropic the surface of the material obtained. The larger the ratio of the long and short axes of the anisotropic topography, the ratio of the long and short axes of the anisotropic topography can be continuously adjusted through the slit width;

[0021] Step 3: Carry out imaging with the help of imaging CCD9 and white lighting light source 7, observe the surface morphology and processing process of the processed ma...

technical field

[0001] The invention relates to a method for processing anisotropic surface topography based on electronic dynamic control, belonging to the field of functional surface applications. Background technique

[0002] Surfaces with anisotropic wetting properties can realize directional sliding of droplets, and have a wide range of applications in the fields of microfluidic channels, biosensors, and droplet directional transport. In order to achieve anisotropic wetting characteristics, it is necessary to construct a surface with anisotropic morphology, and specific processing methods include chemical vapor deposition, photolithography, and interferometry. The research group of Jilin University (Wang S, Wang T, Ge P, et al. Controlling Flow Behavior of Water in Microfluidics with a Chemically Patterned Anisotropic Wetting Surface. Langmuir, 2015) used chemical vapor deposition and chemical etching to obtain a hydrophilic / The substrate of the hydrophobic stripe str...

Examples

Embodiment 1

[0018] The method of surface anisotropic topography processing based on electronic dynamic control, the specific steps are as follows:

[0019] Step 1: Adjust the optical path of the femtosecond laser system to ensure that the laser can be vertically incident on the surface of the sample placed horizontally;

[0020] Step 2: Place the slit where the light path passes, adjust the position of the slit, and adjust the width of the slit to the desired size to ensure that the laser passes through the center of the slit vertically; the smaller the slit width, the more anisotropic the surface of the material obtained. The larger the ratio of the long and short axes of the anisotropic topography, the ratio of the long and short axes of the anisotropic topography can be continuously adjusted through the slit width;

[0021] Step 3: Carry out imaging with the help of imaging CCD9 and white lighting light source 7, observe the surface morphology and processing process of the processed ma...

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