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Photonic crystal template based gold or silver inverse opal microspheres and preparation method thereof

A technology of photonic crystal microspheres and inverse opals, which is applied in the direction of metal material coating process, liquid chemical plating, coating, etc., to achieve the effect of simple preparation process and various materials

Inactive Publication Date: 2019-10-18
JIANGSU CANCER HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Technical problem: the object of the present invention is to provide a kind of based on photonic crystal template gold or silver inverse opal microsphere and preparation method thereof, this microsphere possesses periodic inverse opal microstructure and periodicity adjustable, and its preparation method is simple, cheap , by changing the size of silica particles in the prepared template and the macroscopic size of the template to modulate the microscopic and macroscopic size of gold or silver inverse opal microspheres, which has wide application prospects and has not been prepared before; and the preparation principle of this inverse opal microsphere Ingenious, low cost, while overcoming the shortcomings of the existing technology such as time-consuming and expensive equipment, the spheroidization and solidification of the two-dimensional gold-silver inverse opal structure film is expected to have a wide range of applications in the fields of optoelectronics, photoacoustics, and detection

Method used

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  • Photonic crystal template based gold or silver inverse opal microspheres and preparation method thereof
  • Photonic crystal template based gold or silver inverse opal microspheres and preparation method thereof
  • Photonic crystal template based gold or silver inverse opal microspheres and preparation method thereof

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Embodiment 1

[0032] A preparation method based on photonic crystal template gold inverse opal microspheres (such as figure 1 shown), including the following steps:

[0033] 1) Pre-treatment of hole expansion, hydroxylation and amination of photonic crystal microspheres self-assembled from silica colloidal crystals (such as figure 2 ), the diameter of the microsphere is 60 μm, and the diameter of the silica colloidal crystal is 200 nm;

[0034] ① Soak the photonic crystal microspheres in 2% HF solution for 3 minutes to etch away part of the silicon oxide and increase the gap between the particles;

[0035] ②Then immersed the expanded photonic crystal microspheres in piranha solution overnight to make the surface of silicon oxide with hydroxyl groups;

[0036] ③ After washing the excess piranha solution, soak the microspheres in a 3% aminopropyltrimethoxysilane solution by mass to make the surface of the silicon oxide with amino groups;

[0037] 2) Using the in-situ reduction method on t...

Embodiment 2

[0041] A preparation method based on photonic crystal template gold inverse opal microspheres, comprising the following steps:

[0042] 1) The photonic crystal microspheres self-assembled from silica colloidal crystals are subjected to hole expansion, hydroxylation and amination pretreatment, the diameter of the microspheres is 50 μm, and the diameter of the silica colloidal crystals is 300 nm;

[0043] ① Soak the photonic crystal microspheres in 1% HF solution for 5 minutes to etch away part of the silicon oxide and increase the gap between the particles;

[0044] ②Then immersed the expanded photonic crystal microspheres in piranha solution overnight to make the surface of silicon oxide with hydroxyl groups;

[0045] ③ After washing the excess piranha solution, soak the microspheres in 5% aminopropyltrimethoxysilane solution to make the surface of the silicon oxide with amino groups;

[0046] 2) Using the electrostatic adsorption method on the pretreated SiO 2 Gold seeds ar...

Embodiment 3

[0050] A preparation method based on photonic crystal template silver inverse opal microspheres, comprising the following steps:

[0051] 1) The photonic crystal microspheres self-assembled from silica colloidal crystals are subjected to hole expansion, hydroxylation, and amination pretreatment, the diameter of the microspheres is 60 μm, and the diameter of the silica colloidal crystals is 200 nm;

[0052] ① Soak the photonic crystal microspheres in 1.5% HF solution for 4 minutes to etch away part of the silicon oxide and increase the gap between the particles;

[0053] ②Then immersed the expanded photonic crystal microspheres in piranha solution overnight to make the surface of silicon oxide with hydroxyl groups;

[0054] ③ After washing the excess piranha solution, soak the microspheres in 4% APTES solution to bring amino groups on the surface of the silicon oxide;

[0055] 2) Using the in-situ reduction method on the pretreated SiO 2 Loading gold seeds in particle voids: ...

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Abstract

The invention provides photonic crystal template based gold or silver inverse opal microspheres which have periodic inverse opal microstructures and can be adjusted in periodicity. A preparation method comprises the following steps: 1) carrying out chambering, hydroxylating and aminating pre-treatment on photonic crystal microspheres self-assembled by silicon dioxide colloidal crystals; 2) loadinggold in gaps of silicon dioxide particles of the pre-treated photonic crystal microspheres to obtain gold seeds and removing the gold seeds on the surfaces of the microspheres; and 3) then putting the microspheres in a non-electrolytic electroplating solution of gold or silver to react for a certain time, wherein gold or silver grows on the surfaces of the gold seeds in the silicon dioxide gaps,and then calcining the microspheres to obtain silicon dioxide particles. The method is simple and low in cost. The micro and macro dimensions of the gold or silver inverse opal microspheres are modulated by changing the sizes of the silicon dioxide particles in the template and the macro size of the template to obtain the spherical gold or silver inverse opal structures which are expected to be applied to the fields of photoelectricity, detection and the like widely.

Description

technical field [0001] The invention relates to a gold or silver inverse opal microsphere based on a photonic crystal template and a preparation method thereof, belonging to the field of nanomaterials. Background technique [0002] Since entering the 21st century, nanotechnology has developed rapidly, and the development of nanotechnology is closely related to micro-nano processing technology. [0003] Micro-nano processing technology is mainly divided into two categories. One is top-down methods, such as reactive ion etching, interferometric printing, atomic layer deposition, and magnetron sputtering, etc.; these methods can be used to obtain large-area, uniformly structured two-dimensional and quasi-three-dimensional nanostructures , the application range is more and more extensive. Another approach is bottom-up, with main approaches such as self-assembly, co-assembly, electrochemistry, dealloying, etc. From the standpoint of preparing independent entities of 3D nanostr...

Claims

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Application Information

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IPC IPC(8): C23C18/42
CPCC23C18/1605C23C18/1692C23C18/42
Inventor 牟忠德汪琪叶峰翟振宇
Owner JIANGSU CANCER HOSPITAL
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