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Alpha-Fe2O3 bowl-shaped photon crystal structure and preparation method thereof

A technology of photonic crystals and crystal structures, which is applied in crystal growth, microsphere preparation, chemical instruments and methods, etc., can solve problems affecting the application quality of nanomaterials, nano-iron oxide dispersion, etc., and achieve lower equipment requirements and good repeatability , low cost effect

Inactive Publication Date: 2009-11-04
EAST CHINA NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many methods for preparing nano-iron oxides, there are still many problems, such as: the dispersion of nano-iron oxides. The physical properties of nanomaterials depend to a large extent on their surface characteristics and microstructure, which is also a serious problem. Affected the application quality of nanomaterials

Method used

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  • Alpha-Fe2O3 bowl-shaped photon crystal structure and preparation method thereof
  • Alpha-Fe2O3 bowl-shaped photon crystal structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] a), making a single-layer polystyrene ball template

[0019] Clean the silicon wafer, put it vertically into the suspension of polystyrene beads with a mass fraction of 0.1% after being ultrasonicated for 3 hours, then put it in an electric constant temperature blast drying oven for 3 days at a temperature of 40°C to obtain a single layer Polystyrene pellet template.

[0020] b) Growth of α-Fe 2 o 3 Two-dimensional bowl-shaped photonic crystal structure

[0021] Put the template obtained in step a into a vacuum chamber for 3 minutes, the vacuum degree is 3Pa; configure 1.5mol / L FeNO 3 water solution, and take one drop of the solution and drop it on the template; place the template in an electric constant temperature blast drying oven for 3 hours at a temperature of 110°C, and at this time FeNO 3 The aqueous solution was evaporated to dryness and transformed into α-Fe 2 o 3 Two-dimensional bowl-shaped photonic crystal structure.

[0022] c), remove the polystyrene...

Embodiment 2

[0025] a), making a single-layer polystyrene ball template

[0026] Clean the silicon wafer, put it vertically into the suspension of polystyrene beads with a mass fraction of 0.2% after being ultrasonicated for 3 hours, then put it into an electric constant temperature blast drying oven for 4 days at a temperature of 50°C to obtain a single layer Polystyrene pellet template.

[0027] b) Growth of α-Fe 2 o 3 Two-dimensional bowl-shaped photonic crystal structure

[0028] Put the template obtained in step a into a vacuum chamber for 2 minutes, the vacuum degree is 4Pa; configure 1mol / L FeNO 3 water solution, and take one drop of the solution and drop it on the template; place the template in an electric constant temperature blast drying oven for 2 hours at a temperature of 150°C, and at this time FeNO 3 The aqueous solution was evaporated to dryness and transformed into α-Fe 2 o 3 Two-dimensional bowl-shaped photonic crystal structure.

[0029] c), remove the polystyrene...

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Abstract

The invention discloses an alpha-Fe2O3 bowl-shaped photon crystal structure and a preparation method thereof. The crystal structure is formed by arranging a plurality of bowl-shaped alpha-Fe2O3 units in a hexagonal array on a silicon chip. The preparation method is to take a template prepared from polystyrene protein as a raw material and to grow the crystal structure by a sol-gel method. The crystal structure has nanoscale edges, the surface of the crystal structure has perfect cyclical change, and the unique structure and special paramagnetism of the crystal structure make the crystal structure have tremendous scientific study value and wide commercial application prospect in the aspects of magnetid-optical devices, biological medicaments and the like.

Description

technical field [0001] The invention belongs to the technical field of metal oxide materials, magnetic materials and devices, in particular to a 2 o 3 A photonic crystal structure composed of two-dimensional bowl-shaped nano-units and a preparation method for obtaining a large area of ​​the structure on a silicon wafer by using a sol-gel method without a catalyst. technical background [0002] Nano-iron oxide is an important nanomaterial, because of its good magnetism, light resistance and strong absorption and shielding effect on ultraviolet light, it can be widely used in new magnetic recording materials, electronics, environmental protection, sensors, catalysis, catalysts and fields of biomedicine. Although there are many methods for preparing nano-iron oxides, there are still many problems, such as: the dispersion of nano-iron oxides. The physical properties of nanomaterials depend to a large extent on their surface characteristics and microstructure, which is also a s...

Claims

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Application Information

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IPC IPC(8): C30B29/16C30B29/60B01J13/02C01G49/06
Inventor 吴玮朱自强郁可张正犁白丹张志
Owner EAST CHINA NORMAL UNIVERSITY
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