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A method for preparing large-area single-layer colloidal crystals based on water film

A single-layer colloidal crystal, large-area technology

Active Publication Date: 2021-09-07
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current colloidal self-assembly technology still has key technical problems in the preparation of large-area, high-quality colloidal monolayers, such as large coverage of agglomerated particles, poor microscopic order in large areas, and more grain boundaries, and these structural defects will destroy Periodicity of Surface Potential Energy

Method used

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  • A method for preparing large-area single-layer colloidal crystals based on water film
  • A method for preparing large-area single-layer colloidal crystals based on water film
  • A method for preparing large-area single-layer colloidal crystals based on water film

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Embodiment Construction

[0033] The present invention will be further specifically described below through example implementation and accompanying drawings.

[0034] Step 1. Clean two 20*20mm silica substrates and Petri dishes separately, then soak them in alcohol with a concentration higher than 75% for 5 minutes, then place them in ultrapure water for 5 minutes and repeat the above cleaning for 2-3 times , so that both the front and back sides exhibit super-hydrophilic properties;

[0035] Step 2. Vibrate the monodisperse solution of silica colloidal particles with a radius of 1.01 μm in an ultrasonic instrument for 5 minutes to disperse as much as possible and reduce clusters;

[0036] Step 3. Place the petri dish on a horizontal test bench, and place a piece of substrate from step 1 in the center of the petri dish;

[0037] Step 4. Drop 50 microliters of ultrapure water in the center of the substrate in step 3 to form a water film on the surface of the substrate;

[0038] Step 5. Place the subst...

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Abstract

The invention belongs to the field of colloid science, in particular to a method for self-assembly of dynamic particles using water film. In the present invention, by controlling the position and shape of the droplet on the surface of the substrate and the shape of the substrate, the water film promotes the self-assembly of the particles to achieve rapid preparation of a large-area single-layer silica colloid; The substrate is attached to the multilayer area, so that the upper layer particles in the multilayer area that are difficult to use are separated from the original substrate and adhere to other substrates to complete self-assembly. The invention has the advantages of shorter preparation time compared with the traditional method, and can utilize multi-layer regions that cannot be used by the traditional preparation method, saving research materials.

Description

technical field [0001] The invention belongs to the field of colloid science, and in particular relates to a preparation method of single-layer colloidal crystals. Background technique [0002] Colloidal systems and gas-liquid interfaces are ubiquitous in nature and are very close to production and scientific research. In recent years, due to the excellent performance of various experimental instruments based on colloid scientific theory in industrial production, colloid processing and application have received extensive attention, and have shown great promise in important fields such as optics, electromagnetics, biosensing, and biomedicine. great application potential. Therefore, it is extremely necessary to develop effective colloid processing technology to realize large-area lattice complete two-dimensional colloids with adjustable parameters and reduce production costs. So far, many methods for preparing two-dimensional colloidal structures have been developed, however...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/64C30B7/04
CPCC30B7/04C30B29/64
Inventor 陆雯熙杨云秋张伟
Owner CHINA UNIV OF MINING & TECH
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