A kind of preparation method of composite Raman photonic crystal microsphere

A photonic crystal microsphere and Raman technology, applied in optics, optical components, instruments, etc., can solve the problems of photonic crystal thin film peeling off, difficult to prepare large area, limited detection limit range, etc., and achieve uniform, regular and good appearance. SERS signal enhancement effect, the effect of low equipment requirements

Active Publication Date: 2019-11-01
YANGZHOU UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the photonic crystal thin film is easy to fall off from the substrate, and it is not easy to prepare a large area. Most of the application of the photonic crystal thin film as the substrate reported in the research, its structure is unstable in detection and the sensitivity is not high, and the detection limit range is limited.

Method used

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  • A kind of preparation method of composite Raman photonic crystal microsphere
  • A kind of preparation method of composite Raman photonic crystal microsphere
  • A kind of preparation method of composite Raman photonic crystal microsphere

Examples

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Effect test

Embodiment 1

[0027] 1. Preparation of three-dimensional ordered zinc oxide nanoparticles coated silica photonic crystal microspheres:

[0028] In SiO 2 Photonic crystal microsphere surface modification-NH 2 : First, the calcined SiO 2 Photonic crystal microspheres immersed in 70% ( V / V 0 ) in a mixed solution of concentrated sulfuric acid and 30% hydrogen peroxide overnight, so that the surface of the prepared microspheres has hydroxyl groups. After the microspheres were cleaned, they were blown dry with a nitrogen stream, soaked in a mixed solution of 10 mL of absolute ethanol and 0.5 mL of 3-aminopropyltriethoxysilane (APTES) for 4 h, and placed on the surface Amino groups are further modified, and excess APTES is fully washed after the reaction. Also blow dry with nitrogen stream and save for future use.

[0029] Pour 40 mL of 3.38 g / L zinc acetate ethanol solution and 16 mL of 4.6 g / L sodium hydroxide ethanol solution into the modified -NH 2 0.008g SiO 2 The photonic crystal...

Embodiment 2

[0033] 1. Preparation of three-dimensional ordered zinc oxide nanoparticles coated silica photonic crystal microspheres:

[0034] In SiO 2 Photonic crystal microsphere surface modification-NH 2 : First, the calcined SiO 2 Photonic crystal microspheres immersed in 70% ( V / V 0 ) in a mixed solution of concentrated sulfuric acid and 30% hydrogen peroxide overnight, so that the surface of the prepared microspheres has hydroxyl groups. After the microspheres were cleaned, they were blown dry with a nitrogen stream, soaked in a mixed solution of 10 mL of absolute ethanol and 0.5 mL of 3-aminopropyltriethoxysilane (APTES) for 4 h, and placed on the surface Amino groups are further modified, and excess APTES is fully washed after the reaction. Also blow dry with nitrogen stream and save for future use.

[0035] Pour 40 mL 2.5 g / L zinc acetate ethanol solution and 16 mL 4.4 g / L sodium hydroxide ethanol solution into the modified -NH 2 0.004g SiO 2 The photonic crystal micros...

Embodiment 3

[0039] 1. Preparation of three-dimensional ordered zinc oxide nanoparticles coated silica photonic crystal microspheres:

[0040] In SiO 2 Photonic crystal microsphere surface modification-NH 2 : First, the calcined SiO 2 Photonic crystal microspheres immersed in 70% ( V / V 0 ) in a mixed solution of concentrated sulfuric acid and 30% hydrogen peroxide overnight, so that the surface of the prepared microspheres has hydroxyl groups. After the microspheres were cleaned, they were blown dry with a nitrogen stream, soaked in a mixed solution of 10 mL of absolute ethanol and 0.5 mL of 3-aminopropyltriethoxysilane (APTES) for 4 h, and placed on the surface Amino groups are further modified, and excess APTES is fully washed after the reaction. Also blow dry with nitrogen stream and save for future use.

[0041] Pour 40 mL of 3.8 g / L zinc acetate ethanol solution and 16 mL of 4.8 g / L sodium hydroxide ethanol solution into the modified -NH 2 0.012g SiO 2 The photonic crystal ...

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Abstract

The invention discloses a method for preparing composite Raman photonic crystal microspheres, belonging to the technical fields of biomedical research, environmental monitoring and clinical detection. Mix ethanol solution of zinc acetate, ethanol solution of sodium hydroxide and silicon dioxide photonic crystal microspheres, stir and react in a constant temperature water bath to obtain zinc oxide nanoparticles-coated silicon dioxide photonic crystal microspheres; Diol solution and ZnO nanoparticles-coated silica photonic crystal microspheres were mixed, and then AgNO 3 Aqueous solution and NaBH 4 The aqueous solution is stirred and reacted in a constant temperature water bath to prepare a composite Raman photonic crystal microsphere. Prepared three-dimensional ordered Ag / ZnO / SiO 2 Photonic crystal microsphere material with uniform and regular shape. The invention has the characteristics of simple preparation method, low cost, high sensitivity, good repeatability, high stability, good surface enhancement effect and the like.

Description

technical field [0001] The invention belongs to the technical fields of biomedical research, environmental monitoring and clinical detection. Background technique [0002] Surface-enhanced Raman scattering (SERS) technology has been more and more widely used in environmental monitoring and biological analysis due to its unique advantages such as narrow spectral band, high sensitivity, fast detection speed and non-destructive. An ideal and efficient SERS substrate usually requires not only huge hot spots for high sensitivity, but also spots with uniform thermal distribution to ensure good signal reproducibility. The synergistic effect of semiconductor-metal composite materials is currently attracting more attention in the field of SERS, especially the composite substrate of ZnO and noble metal, which has a dominant self-cleaning ability. As a wide bandgap ZnO with 3.7 eV has been demonstrated to have outstanding chemical enhancement effect. In 3D ZnO / SiO 2 Depositing a la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/00
CPCG02B1/005
Inventor 李娟李新卉李宛玲童晶晶冯孟杰刁国旺
Owner YANGZHOU UNIV
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