A two-dimensional colloidal crystal-gold array/smart hydrogel composite with high diffraction intensity and a visual sensor

Abstract

The invention discloses a high-diffraction-intensity two-dimensional colloidal crystal-gold array / intelligent hydrogel composite material and a visual sensor.A preparing method of the high-diffraction-intensity two-dimensional colloidal crystal-gold array / intelligent hydrogel composite material includes the following steps that a single-layer colloidal crystal array is prepared on a substrate, the single-layer colloidal crystal array serves as a template, a gold film with the thickness of 35 nm-50 nm is deposited on the surface of the template with the physical deposition method, and therefore a two-dimensional colloidal crystal-gold array with the gold film as a shell is prepared; reaction liquid of intelligent hydrogel is injected into the two-dimensional colloidal crystal-gold array, the product is covered with a glass sheet, then photopolymerization treatment is carried out for 10-30 min, stripping and washing are carried out, and the high-diffraction-intensity two-dimensional colloidal crystal-gold array / intelligent hydrogel composite material is prepared.By means of the high-diffraction-intensity two-dimensional colloidal crystal-gold array / intelligent hydrogel composite material, intense diffraction signals can be obtained without a high reflective mirror, and the high-diffraction-intensity two-dimensional colloidal crystal-gold array / intelligent hydrogel composite material has the advantages of being sensitive, simple in preparing procedure and low in cost, and is suitable for practical industrial applications.

Description

technical field [0001] The present invention relates to the field of nanomaterials, in particular to a two-dimensional colloidal crystal with high diffraction intensity (for example: the colloidal crystal can be made of polystyrene (Polystyrene, PS), silicon dioxide (SiO 2 ) or polymethyl methacrylate (PMMA))-gold (chemical element symbol: Au) array / smart hydrogel composites and visualization sensors. Background technique [0002] At present, the detection of biochemical substances mainly relies on traditional analysis methods such as Raman spectroscopy, mass spectrometry, and fluorescence methods, but these analysis methods not only require expensive equipment, but also the analysis process is relatively complicated, requiring professionally trained personnel In addition, these analytical methods cannot realize real-time online detection of biochemical substances. Therefore, how to detect biochemical substances in a simple, economical, fast and stable manner has become an u...

AI Technical Summary

Problems solved by technology

However, in the prior art, since the reflectivity of colloidal microspheres of colloidal crystals is very low, the diffraction intensity of visible light for sensors combined with colloidal crystals and smart hydrogels is also very low. Only aluminum mirrors, gold mirrors, silver mirrors, etc. Only high reflective mirrors can obtain the corresponding optical response characterization, which limits the practical application of colloidal crystal and smart hydrogel composite sensors.

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