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Quickly assembling method for colloidal crystal with controllable layer number

A technology for colloidal crystals and an assembly method, which is applied in the fields of colloidal chemistry, colloidal chemistry, chemical instruments and methods, etc., can solve the problems of difficulty in obtaining colloidal crystals with a controllable number of layers, complicated and cumbersome preparation methods, and difficult to control, and achieves short preparation time. , The process is stable and controllable, and the effect of less influencing parameters

Active Publication Date: 2014-02-19
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that it is difficult to obtain colloidal crystals with a controllable layer number in the existing colloidal crystal preparation method, and the preparation method is complicated, time-consuming, and difficult to control. The present invention provides a colloidal crystal with a controllable layer number. A Rapid Assembly Method for Crystals

Method used

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  • Quickly assembling method for colloidal crystal with controllable layer number
  • Quickly assembling method for colloidal crystal with controllable layer number
  • Quickly assembling method for colloidal crystal with controllable layer number

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Inject ultrapure water accounting for 3 / 4 of the volume into the open container, and use a micro-injector to continuously drop polystyrene microsphere emulsion with a particle size of 1 μm on the water surface, and the drop rate of the emulsion is 5 μL / s. The volume fraction ratio of microspheres and alcohol in the styrene microsphere emulsion is 1:1. Stop dripping the emulsion when the polystyrene microspheres are completely covered with the water surface and form a layer of dense particle layer; carry out ultrasonic vibration on the open container, the ultrasonic frequency is 25KHZ, after 2 minutes the dense particle layer on the water surface presents a uniform Color; at this time, immerse the clean substrate under the liquid surface, and lift the substrate out of the liquid surface with a dipping and pulling device, and the linear speed of pulling is 5 μm / s. After drying at 80°C, highly ordered monolayer colloidal crystals were obtained, such as figure 1 and figu...

Embodiment 2

[0021] Inject ultrapure water accounting for 4 / 5 of the volume into the open container, and continuously drop the polystyrene microsphere emulsion with a particle size of 1 μm onto the water surface using a micro-injector. The drop rate of the emulsion is 100 μL / s. The volume fraction ratio of microspheres and alcohol in the styrene microsphere emulsion is 1:5. Stop dripping the emulsion when the polystyrene microspheres are completely covered with the water surface and form a dense granular layer; ultrasonically vibrate the open container, the ultrasonic frequency is 40KHZ, and the dense granular layer on the water surface appears uniform after 10 minutes. Color; at this time, the single-layer colloidal crystal prepared in Example 1 was immersed under the liquid surface, and lifted out of the liquid surface with a dipping and pulling device, and the linear speed of pulling was 500 μm / s. After drying at 100°C, highly ordered bilayer colloidal crystals were obtained, such as ...

Embodiment 3

[0023] Inject ultrapure water accounting for 3 / 4 of the volume into the open container, and continuously drop the polystyrene microsphere emulsion with a particle size of 1 μm onto the water surface using a micro-injector, and the drop rate of the emulsion is 50 μL / s. The volume fraction ratio of microspheres and alcohol in the styrene microsphere emulsion is 1:2. Stop dripping the emulsion when the polystyrene microspheres are completely covered with the water surface and form a layer of dense particle layer; carry out ultrasonic vibration on the open container, the ultrasonic frequency is 25KHZ, after 2 minutes the dense particle layer on the water surface presents a uniform Color; at this time, the double-layer colloidal crystal prepared in Example 2 was immersed under the liquid surface, and lifted out of the liquid surface with a dipping and pulling device, and the linear speed of pulling was 200 μm / s. After drying at 90°C, highly ordered three-layer colloidal crystals we...

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Abstract

The invention relates to a quickly assembling method for a colloidal crystal with controllable layer number. The method comprises the following steps: (1) injecting ultrapure water into an open vessel, continuously and dropwise adding a polystyrene microsphere emulsion on the water surface by using a trace liquid inlet device until microspheres fully overspread the water surface; (2) performing ultrasonic oscillation on the open vessel until a densely arrayed particle layer is uniformly colorful; (3) immersing a clean substrate below the water level, pulling the substrate out of the water level by adopting a dipping pulling device, drying at the temperature of 100 DEG C so as to obtain a single-layered colloidal crystal which is highly ordered; immersing a coating film sample below the water level again, repeating the above steps so as to obtain a double-layered colloidal crystal, repeatedly performing the steps so as to obtain the highly-ordered colloidal crystal of which the layer number can be precisely controlled. The method has the characteristics of simplicity, convenience, quickness and low cost, the whole preparation process only requires 4-10 minutes, besides, the layer number can be precisely controlled, and any required layer number can be realized; the quickly assembling method provides an effective pathway for the application and industrialization of the colloidal crystal in the field of nanotechnology.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and relates to a preparation method of colloidal crystals, in particular to a rapid assembly method of colloidal crystals with a controllable layer number. Background technique [0002] Colloidal crystal refers to the ordered periodic structure formed by the self-assembly arrangement of monodisperse colloidal microspheres. The lattice lattice in colloidal crystals is not composed of usual atoms or molecules, but is composed of colloidal microspheres. The periodic ordered structure of colloidal crystals endows them with exotic optical diffraction and photonic bandgap properties, making them have important applications in optoelectronics, such as photonic crystals, optical microlenses, high-density magnetic data storage devices, and chemical and biological sensors Wait. In addition, colloidal crystals can be used as templates to prepare ordered porous structures with complete pho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00B82Y40/00
Inventor 祁洪飞刘大博
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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