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A Self-Assembly Method of Monolayer Colloidal Crystal Driven by Interfacial Water Film

A single-layer colloidal crystal and self-assembly technology, applied in the field of nanofabrication, can solve the problems of reducing the quality and device performance of 2D/3D nanostructure arrays, poor microscopic order in large areas, and large coverage of agglomerated particles. Good area micro-ordering, reducing surface coverage, avoiding deposition and adhesion effects

Active Publication Date: 2021-03-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 be extremely serious. Drastically degrades the quality of 2D / 3D nanostructure arrays and device performance

Method used

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  • A Self-Assembly Method of Monolayer Colloidal Crystal Driven by Interfacial Water Film
  • A Self-Assembly Method of Monolayer Colloidal Crystal Driven by Interfacial Water Film
  • A Self-Assembly Method of Monolayer Colloidal Crystal Driven by Interfacial Water Film

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Embodiment 1

[0035] A method for self-assembly of single-layer colloidal crystals driven by an interface water film, comprising the following steps:

[0036]Step 1. Place two 10×10mm double-polished Si(100) substrates and two glass slides in acetone, absolute ethanol and deionized water for ultrasonic cleaning for 10 min, take them out and dry them with nitrogen, and place one Si (100) substrate (marked as substrate 1) and glass slide are not subjected to any hydrophilic treatment; while another Si (100) substrate (marked as substrate 2) and glass slide are placed in ultraviolet ozone Oxidation treatment for 20 minutes, so that their front and back sides are super-hydrophilic;

[0037] Step 2. The substrate 1 after ultrasonic cleaning in step 1 and the substrate 2 after superhydrophilic treatment are attached to the geometric center of the slide glass respectively, so as to achieve the purpose of fixing the substrate;

[0038] Step 3. Place the glass slide with the substrate fixed in step...

Embodiment 2

[0044] A method for self-assembly of single-layer colloidal crystals driven by an interface water film, comprising the following steps:

[0045] Step 1. Place two 10×10mm double-polished Si(100) substrates (respectively marked as substrate A and substrate B) and the glass slide in acetone, absolute ethanol and deionized water for ultrasonic cleaning for 8 minutes, Take it out and blow it dry with nitrogen, then immerse the substrate and slide glass together in 80 °C H 2 O / H 2 o 2 / NH 4 OH mixed solution for 40 minutes, so that both the front and back sides of the substrate and slide show super-hydrophilic properties;

[0046] Step 2. Attach the super-hydrophilic treated substrate A in step 1 to the geometric center of the glass slide to achieve the purpose of fixing the substrate, and put the substrate B directly into the glass container;

[0047] Step 3. Place the glass slide with the substrate fixed in step 2 at an angle of 20° in a glass container with a diameter of 15m...

Embodiment 3

[0053] A method for self-assembly of single-layer colloidal crystals driven by an interface water film, comprising the following steps:

[0054] Step 1. Place two 10×10mm double-polished Si(100) substrates (respectively marked as substrate a and substrate b) and two glass slides in acetone, absolute ethanol and deionized water for ultrasonic cleaning 10min, take it out and blow it dry with nitrogen, then immerse the substrate and the glass slide together in 80°C H 2 O / H 2 o 2 / NH 4 OH mixed solution for 25 minutes, so that both the front and back sides of the substrate and slide show super-hydrophilic properties;

[0055] Step 2. Attach substrate a and substrate b that have undergone superhydrophilic treatment in step 1 to the geometric center positions of the two glass slides respectively, so as to achieve the purpose of fixing the substrate;

[0056] Step 3. Place the glass slide with the substrate fixed in step 2 at an angle of 30° in a glass container with a diameter o...

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Abstract

The invention provides a self-assembly method of single-layer colloidal crystals based on interface water film driving, and belongs to the technical field of nano processing. According to the method disclosed by the invention, colloidal particles on a water-air interface in a glass container are driven to be spontaneously assembled on the surface of a substrate by utilizing extremely strong capillary action force of a water film on the surface of the super-hydrophilic substrate; therefore, chip-level or wafer-level high-quality single-layer colloidal crystals are obtained, and remarkable advantages of low coverage rate of agglomerated particles, good large-area microscopic orderliness, few crystal boundaries and the like are achieved.

Description

technical field [0001] The invention belongs to the technical field of nano-processing, and in particular relates to a self-assembly method of a single-layer colloidal crystal driven by an interface water film. Background technique [0002] In recent years, the processing and application of two-dimensional / three-dimensional (2D / 3D) nanostructure arrays have received increasing attention due to the remarkable structure-dependent performance of various advanced functional devices, and have been widely used in optics, electronics, and electronics. Important fields such as , biological and chemical sensing, biomimetic and energy conversion have shown great application potential. Therefore, it is extremely necessary to develop effective nanofabrication techniques to realize large-scale and low-cost fabrication of large-area 2D / 3D nanostructure arrays with tunable structural parameters. So far, many methods have been developed for fabricating 2D / 3D nanostructure arrays, such as o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B35/00
CPCC30B35/00
Inventor 熊杰汪红波晏超贻饶高峰陈伟王显福刘雨晴
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA