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A large-area defect-free two-dimensional colloidal single crystal, its preparation method and its transfer method

A two-dimensional colloid, large-area technology, applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the problems of the hydrophilicity and hydrophobicity of the substrate surface, time-consuming and other problems, and achieve a simple and efficient preparation method and a wide range of applications. Wide range of effects with simple ingredients

Active Publication Date: 2017-12-26
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is quite time-consuming (usually more than half an hour) and requires the surface of the substrate to be hydrophilic and hydrophobic. In addition, once the colloidal single crystal is formed on a flat substrate, it cannot be transferred to other substrates.

Method used

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  • A large-area defect-free two-dimensional colloidal single crystal, its preparation method and its transfer method
  • A large-area defect-free two-dimensional colloidal single crystal, its preparation method and its transfer method
  • A large-area defect-free two-dimensional colloidal single crystal, its preparation method and its transfer method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The raw materials are monodisperse spherical polystyrene particles with a diameter of 1.4 μm, sodium dodecylsulfonate, ethanol, butanol, and pure water. Among them, based on the amount of pure water, the concentration of sodium dodecylsulfonate is 17.9 mg / mL; the ratio of ethanol and butanol in the colloidal particle suspension system is 1:7 (v:v), and the amount of glycol is As a standard, the concentration of colloidal particles was 30.0 mg / mL. First disperse the colloidal particles in the glycol dispersion medium, after the ultrasonic dispersion is uniform, drop by drop to the surface of pure water dissolved in sodium dodecylsulfonate. While dripping the suspension of colloidal particles dispersed, apply airflow (flow rate: 6.0L / min) to the water surface through a flat nozzle. After the colloidal particles cover the entire water surface, the colloidal particles no longer move with the airflow. Increase the air flow rate (10.0L / min), move the nozzle left and right at...

Embodiment 2

[0046] The raw materials are monodisperse spherical polystyrene particles with a diameter of 1.4 μm, sodium dodecylsulfonate, ethanol, butanol, and pure water. Among them, based on the amount of pure water, the concentration of sodium dodecylsulfonate is 35.7 mg / mL; the ratio of ethanol and butanol in the colloidal particle suspension system is 1:7 (v:v), and the amount of glycol is As a standard, the concentration of colloidal particles was 30.0 mg / mL. First disperse the colloidal particles in the glycol dispersion medium, after the ultrasonic dispersion is uniform, drop by drop to the surface of pure water dissolved in sodium dodecylsulfonate. While dripping the suspension of colloidal particles dispersed, apply airflow (flow rate: 6.0L / min) to the water surface through a flat nozzle. After the colloidal particles cover the entire water surface, the colloidal particles no longer move with the airflow. Increase the air flow rate (10.0L / min), move the nozzle left and right at...

Embodiment 3

[0049] The raw materials are monodisperse spherical polystyrene particles with a diameter of 0.8 μm, sodium dodecylsulfonate, ethanol, butanol, and pure water. Among them, based on the amount of pure water, the concentration of sodium dodecylsulfonate is 35.7 mg / mL; the ratio of ethanol and butanol in the colloidal particle suspension system is 1:7 (v:v), and the amount of glycol is As a standard, the concentration of colloidal particles was 30.0 mg / mL. First disperse the colloidal particles in the glycol dispersion medium, after the ultrasonic dispersion is uniform, drop by drop to the surface of pure water dissolved in sodium dodecylsulfonate. While dripping the suspension of colloidal particles dispersed, apply airflow (flow rate: 6.0L / min) to the water surface through a flat nozzle. After the colloidal particles cover the entire water surface, the colloidal particles no longer move with the airflow. Increase the air flow rate (10.0L / min), move the nozzle left and right at...

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Abstract

This patent relates to the preparation of a large-area defect-free two-dimensional colloidal single crystal and its undisturbed transfer method. The two-dimensional colloidal single crystal colloidal particles are self-assembled at the water / air interface and have excellent transferability; the size can reach several square centimeters without any defects. The present invention also provides an improved undisturbed transfer method of the two-dimensional colloidal single crystal, through which the transfer to different substrate surfaces can be realized without causing obvious disturbance to the colloidal single crystal. The preparation method of the two-dimensional colloidal single crystal of the present invention is simple and efficient, the transfer method has no selectivity for the hydrophilicity and hydrophobicity and curvature of the substrate surface, and has broad application prospects.

Description

field of invention [0001] The invention relates to a large-area defect-free two-dimensional colloidal single crystal, and also relates to the preparation and undisturbed transfer method of the colloidal single crystal. Background of the invention [0002] Two-dimensional colloidal crystals are widely used as templates for the construction of various ordered structures due to their unique periodicity. For the construction of ordered structures based on two-dimensional colloidal crystals as templates, the first problem to be solved is how to prepare large-area defect-free two-dimensional colloidal crystals. Up to now, people have developed a variety of methods to prepare 2D colloidal crystals, the most common of which is the self-assembly technique based on convective sedimentation. It has been reported in the literature that with the help of this technique, a centimeter-scale defect-free two-dimensional colloidal single crystal can be prepared with the assistance of a specia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/64C30B29/58C30B5/00
Inventor 邱东孟晓辉
Owner INST OF CHEM CHINESE ACAD OF SCI
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