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
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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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