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.