Method for preparing cylinder hollow macroporous ordered colloidal crystal

A technology of orderly macropores and colloidal crystals, applied in crystal growth, colloidal chemistry, colloidal chemistry, etc., can solve the problem of high cost

Inactive Publication Date: 2009-03-25
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the cost is higher

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  • Method for preparing cylinder hollow macroporous ordered colloidal crystal
  • Method for preparing cylinder hollow macroporous ordered colloidal crystal
  • Method for preparing cylinder hollow macroporous ordered colloidal crystal

Examples

Experimental program
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Embodiment 1

[0022] Embodiment 1, using the method of the present invention to prepare colloidal crystals with symmetrical cylindrical hollow type macropore order, its preparation process steps are as follows:

[0023] A. Use hydrochloric acid (HCl), acetone, and deionized water to repeatedly clean the capillary glass tube in an ultrasonic cleaner;

[0024] B. Configure an aqueous solution of colloidal microspheres. The colloidal microsphere aqueous solution has a microsphere diameter of 700nm, (diameter deviation / average diameter) ×%<0.2%, and a concentration (mass percentage) of 2%;

[0025] C. Insert the cleaned capillary glass tube vertically into the glass bottle filled with colloidal microsphere aqueous solution, fix the upper end of the capillary glass tube on a wire, and let it stand for 20 minutes;

[0026] D. The metal wire is controlled by a stepping motor to move up and down vertically at a speed of 1 micron / second; thus the capillary glass tube moves up and down vertically, w...

Embodiment 2

[0029] Embodiment 2, using the method of the present invention to prepare colloidal crystals with symmetrical cylindrical hollow macropores, the preparation process steps are as follows:

[0030] A. Use hydrochloric acid (HCl), acetone, and deionized water to repeatedly clean the capillary glass tube in an ultrasonic cleaner;

[0031] B. Configure an aqueous solution of colloidal microspheres. The colloidal microsphere aqueous solution has a microsphere diameter of 700nm, (diameter deviation / average diameter) ×%<0.2%, and a concentration (mass percentage) of 8%;

[0032] C. Insert the cleaned capillary glass tube vertically into the glass bottle filled with colloidal microsphere aqueous solution, fix the upper end of the capillary glass tube on a wire, and let it stand for 10 minutes;

[0033] D. The metal wire is controlled by a stepping motor to move up and down vertically at a speed of 30 microns / second; thus the capillary glass tube moves up and down vertically, which is ...

Embodiment 3

[0036] Embodiment 3, using the method of the present invention to prepare colloidal crystals with symmetrical cylindrical hollow type macropores, the preparation process steps are as follows:

[0037] A. Use hydrochloric acid (HCl), acetone, and deionized water to repeatedly clean the capillary glass tube in an ultrasonic cleaner;

[0038] B. Configure an aqueous solution of colloidal microspheres. The colloidal microsphere aqueous solution has a microsphere diameter of 700nm, (diameter deviation / average diameter) ×%<0.2%, and a concentration (mass percentage) of 5%;

[0039] C. Insert the cleaned capillary glass tube vertically into the glass bottle filled with colloidal microsphere aqueous solution, fix the upper end of the capillary glass tube on a wire, and let it stand for 15 minutes;

[0040] D. The metal wire is controlled by a stepping motor to move vertically up and down at a speed of 15 microns / second; thereby the capillary glass tube moves vertically up and down, w...

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Abstract

The invention discloses a preparation method of a cylindrical hollow macroporous ordered colloidal crystal, which comprises the steps as follows: a glass capillary is cleaned in an ultrasonic cleaner with hydrochloric acid, acetone and deionized water; the glass capillary after being cleaned is vertically inserted into a glass bottle holding colloidal microsphere water solution; the upper end of the glass capillary is fixed on a metal filament and placed stilly for 10 minutes to 20 minutes; the vertical movement of the metal filament is controlled by a stepping motor; an electric field is externally added in the vertical direction of the bottle and the strength of the electric field is 50 V / m to 100 V / m; the whole device is placed at a constant temperature of 40 DEG C to 80 DEG C; the colloidal crystal grows in the inner wall of the glass capillary in a self-assembly manner. The method utilizes the externally added electric field to balance weight, slow down the deposition speed of colloidal microspheres and prolong the crystallization process of the colloidal crystal and adopts a stretching method to overcome the defect that the layer quantity of the colloidal crystal is uncontrollable; the colloidal crystal prepared has photonic bandgaps, and hollow structure of the colloidal crystal is adopted as a good linear defect, thus needing no introduction of any defect to the colloidal crystal.

Description

technical field [0001] The invention relates to a technique for growing colloidal crystals on the inner wall of a hollow capillary glass tube, which uses the combination of an external electric field and a stretching method to prepare colloidal crystals with cylindrical hollow and large pores in the hollow capillary glass tube. Background technique [0002] Colloidal crystals refer to submicron monodisperse colloidal microspheres spontaneously forming a three-dimensional ordered periodic structure under suitable conditions. The self-assembly of colloidal microspheres is considered to be the most effective and promising method for the preparation of near-infrared, optical, and shorter-wavelength three-dimensional photonic crystals. Colloidal photonic crystals do not have a complete bandgap, but they can not only be used to make optical filters and optical switches, high-density magnetic data storage devices, chemical and biological sensors, but also provide a basis for prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/00C30B29/66C30B30/02C30B5/00B01J13/00
Inventor 王鸣闫海涛喻平葛益娴郭文华刘青
Owner NANJING NORMAL UNIVERSITY
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