Method for preparing large-area single-layer colloidal crystal based on water film

A single-layer colloidal crystal, large-area technology, applied in the field of colloid science, can solve the problems of destroying the periodicity of surface potential energy, poor microscopic order in large areas, and large coverage of agglomerated particles, and achieve good micro-ordering in large areas, The effect of reducing surface coverage and low coverage of agglomerated particles

Active Publication Date: 2021-03-26
CHINA UNIV OF MINING & TECH
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  • Abstract
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  • 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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  • Method for preparing large-area single-layer colloidal crystal based on water film
  • Method for preparing large-area single-layer colloidal crystal based on water film
  • Method for preparing large-area single-layer colloidal crystal 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, and particularly relates to a particle self-assembly method utilizing water film power. By controlling the position and shape of liquid drops onthe surface of a substrate and the shape of the substrate, self-assembly of particles is promoted through a water film, and large-area single-layer silicon dioxide colloid is rapidly prepared; and ifa multi-layer region appears in a sample, other layers of substrates are attached to the multi-layer region, so that upper-layer particles of the multi-layer region which is difficult to use originally are separated from the original substrate and are adhered to the other substrates to finish self-assembly. The method has the advantages that: compared with a traditional method, the preparation time is shorter, the multi-layer region which cannot be used by the traditional preparation method can be utilized, and research materials are saved.

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 Applications(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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