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Binary ordered colloidal crystal template and preparation method and use thereof

A technology of colloidal crystal templates and colloidal crystals, which is applied in crystal growth, chemical instruments and methods, and single crystal growth, can solve the problems of large average particle distance, unfavorable applications, and inability to produce binary colloidal crystals. Scientific method and universal effect

Inactive Publication Date: 2011-09-28
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this binary colloidal crystal and its preparation method all have weak points, at first, the diameter difference and mixing ratio between the two kinds of particles that constitute the binary colloidal crystal are all too small, especially the too small diameter difference and There is not much difference between single-size crystals, which is not only unfavorable for practical applications, but also appears as described in the article when the number density ratio of the two particles changes from 1:0 to 0:1, the average particle size of colloidal crystals When the number density ratio of the two particles is 5:1, the colloidal crystal has a superlattice structure, which greatly restricts its application range; colloidal crystal

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  • Binary ordered colloidal crystal template and preparation method and use thereof
  • Binary ordered colloidal crystal template and preparation method and use thereof
  • Binary ordered colloidal crystal template and preparation method and use thereof

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Embodiment 1

[0025] The concrete steps of preparation are:

[0026] First, the large-diameter polystyrene colloidal sphere solution and the small-diameter polystyrene colloidal sphere solution with a mass percentage solubility of 1.5% are uniformly mixed according to a volume ratio of 10:1 to obtain a mixed solution; wherein, the large-diameter polystyrene The colloid ball diameter of the ethylene colloid sphere solution is 1000nm, and the colloid sphere diameter of the small-diameter polystyrene colloid sphere solution is 250nm. Then, the mixed liquid was added dropwise on the substrate and then spin-coated and shaken off; wherein, the substrate was glass, the volume of the mixed liquid dropped onto the substrate was 4 μL, and the spin-coating speed was 300 r / s when the mixed liquid was thrown off. After natural drying at a temperature of 24°C, a product similar to figure 1 , figure 2 A and figure 2 The binary ordered colloidal crystal template shown in B.

Embodiment 2

[0028] The concrete steps of preparation are:

[0029] First, the large-diameter polystyrene colloidal sphere solution and the small-diameter polystyrene colloidal sphere solution with a mass percentage solubility of 3% are uniformly mixed according to a volume ratio of 15:1 to obtain a mixed solution; wherein, the large-diameter polystyrene The colloidal sphere diameter of the ethylene colloidal sphere solution is 1000nm, and the colloidal sphere diameter of the small-diameter polystyrene colloidal sphere solution is 200nm. The mixed liquid was added dropwise on the substrate and then spin-coated and shaken off; wherein, the substrate was glass, the volume of the mixed liquid dropped onto the substrate was 5.5 μL, and the spin-coated spin-off was 500 r / s. After natural drying at a temperature of 25°C, the following figure 1 shown, approximately figure 2 A and figure 2 The binary ordered colloidal crystal template shown in B.

Embodiment 3

[0031] The concrete steps of preparation are:

[0032] First, the large-diameter polystyrene colloidal sphere solution and the small-diameter polystyrene colloidal sphere solution with a mass percentage solubility of 5% are uniformly mixed according to a volume ratio of 20:1 to obtain a mixed solution; wherein, the large-diameter polystyrene The colloid ball diameter of the ethylene colloid sphere solution is 1000nm, and the colloid sphere diameter of the small-diameter polystyrene colloid sphere solution is 150nm. Then, the mixed liquid was added dropwise on the substrate and then spin-coated and shaken off; wherein, the substrate was glass, the volume of the mixed liquid dropped onto the substrate was 7 μL, and the spin-coated spin-off was 700 r / s. After natural drying at a temperature of 26°C, a product similar to figure 1 , figure 2 A and figure 2 The binary ordered colloidal crystal template shown in B.

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Abstract

The invention discloses a binary ordered colloidal crystal template and a preparation method and use thereof. The template consists of a substrate and colloidal crystals on the substrate, wherein particularly the colloidal crystals consist of polystyrene colloidal spheres with two different diameters in a ratio of (5-20):1; the diameter of the big-diameter colloidal spheres is 250 to 5,000 nanometers, and the diameter of the small-diameter colloidal spheres is 50 to 250 nanometers; the big-diameter colloidal spheres are arranged in a single layer according to a hexagonal ordered structure; the small-diameter colloidal spheres are positioned between the big-diameter colloidal spheres; and the colloidal crystals are 250 to 5,000 nanometers thick. The method comprises the following steps: uniformly mixing big-diameter polystyrene colloidal sphere solution and small-diameter polystyrene colloidal spheres solution, the mass percentage solubility of each of which is 1.5 to 10 percent, according to a volume ratio of (10-30):1 to obtain mixed solution; dripping the mixed solution onto a substrate; spinning and casting; and naturally drying to obtain the binary ordered colloidal crystal template. The binary ordered colloidal crystal template can be widely used for preparing a single-layer or multi-layer binary ordered porous thin film.

Description

technical field [0001] The invention relates to a crystal template and its preparation method and use, in particular to a binary ordered colloidal crystal template and its preparation method and use. Background technique [0002] Colloidal crystals refer to two-dimensional or three-dimensional ordered structures assembled and arranged in a certain way by colloidal spheres. Due to its potential application advantages in photonic crystals, optoelectronic devices, and biochip sensing, it has attracted extensive attention in recent years. So far, there have been a large number of literature reports on the research work on the self-assembly of colloidal crystals. However, the colloidal spheres used are all of a single size, so the formed colloidal crystals are limited to several simple types, such as: Face-centered cubic, hexagonal close-packed, body-centered cubic. This also limits the physical and chemical properties of colloidal crystals and their practical applications. In...

Claims

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Application Information

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IPC IPC(8): C30B29/58
Inventor 贾丽超王洪强刘广强蔡伟平
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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