Self-assembling growth method of layer-controllable colloidal crystal

A technology of colloidal crystals and growth methods, applied in crystal growth, single crystal growth, single crystal growth, etc., can solve the problems of complex preparation methods, difficult control, and difficulty in obtaining colloidal crystals with a controllable number of layers, and achieve simple process , easy to control, overcome the effect that the number of layers is not easy to control

Active Publication Date: 2011-01-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing colloidal crystal preparation method is complex and difficult to control, and it is difficult to obtain a colloidal crystal with a controllable layer number. The present invention provides a self-assembled growth method for a colloidal crystal with a controllable layer number.

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  • Self-assembling growth method of layer-controllable colloidal crystal
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  • Self-assembling growth method of layer-controllable colloidal crystal

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specific Embodiment approach 1

[0012] Embodiment 1: This embodiment is a self-assembly growth method of colloidal crystals with a controllable layer number. The self-assembly growth method of colloidal crystals with a controllable layer number is realized through the following steps: 1. Put the substrate in acetone, methanol and Ultrasonic cleaning in ultra-pure water for 20-30 minutes, then treating with ozone for 30-60 minutes, and then drying; 2. Put the colloidal particles and dispersion solvent into a flat-bottomed test tube to prepare a colloidal particle suspension with a mass fraction of 0.005% to 2%. , wherein the dispersion solvent is one or a mixture of ultrapure water and absolute ethanol; 3. Insert the substrate treated in step 1 into the colloidal particle suspension at an angle of 60°-80° to the bottom of the flat-bottomed test tube immerse the substrate completely in the colloidal particle suspension, and then place the flat-bottomed test tube in a constant temperature incubator with a temper...

specific Embodiment approach 2

[0016] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the substrate in step 1 is an ordinary glass substrate, ITO conductive glass sheet, quartz glass sheet or silicon wafer. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0017] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the colloidal particles described in step two are monodisperse silicon dioxide (SiO 2 ), polystyrene (PS) or polymethyl methacrylate (PMMA) microspheres, or one of the above colloidal particles coated with gold, silver, copper, platinum or TiO 2 formed nanoparticles. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

[0018] In this embodiment, the particle size of the colloidal particles is 100-1000 nm, and the standard deviation of the particle size of the colloidal particles is less than 5%.

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Abstract

The invention provides a self-assembling growth method of a layer-controllable colloidal crystal, which relates to a self-assembling growth method of a colloidal crystal and solves the problems that the traditional preparation method of colloidal crystal is more complicated, not easy to control and difficult to obtain the layer-controllable colloidal crystal. The method comprises the following steps of: 1. carrying out cleaning processing on a substrate, 2. preparing a colloidal particle suspension; and 3. inserting the substrate processed in the step 1 into the colloidal particle suspension prepared in the step 2, and placing into a constant-temperature incubator for 2-3 days. The method has the advantages of simple process, high efficiency, easy control and good repeatability and solvesthe problems of difficult layer number control of the self-assembling growing colloidal crystal and lower order degree of the obtained colloidal crystal of a traditional method and can be used for growing the colloidal crystals with large areas, ordered height and controllable layer number. The layer-controllable colloidal crystal obtained through self-assembly supplies a material for intensivelystudying the structure and the optical property of photonic crystals and simultaneously supplies a more rational and accurate template for three-dimensional ordered macroporous materials.

Description

technical field [0001] The invention relates to a method for self-assembly growth of colloidal crystals. Background technique [0002] Colloidal crystal refers to a three-dimensional ordered periodic structure formed by self-assembly of monodisperse colloidal particles suspended in a solution. Instead of the molecules or atoms of ordinary crystals, a small colloidal particle occupies each lattice point in a colloidal crystal. Due to the ordered structure of the periodic arrangement of colloidal particles, it has the characteristics of great application value such as light diffraction and photonic band gap, which can be used as photonic crystals in optical filters, optical switches, high-density magnetic data storage devices, chemical It has important application prospects in biosensing and other aspects. In addition, colloidal photonic crystals can be used as templates to prepare three-dimensional ordered porous structures with complete photonic band gaps. This regularly a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00C30B29/68
Inventor 赵九蓬丁艳波李垚詹耀辉邢麒麟范曾
Owner HARBIN INST OF TECH
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