42results about How to "Wide range of discoloration" patented technology

The invention discloses an organic-inorganic electrode polarized particle, its preparation method and its application in an electrode polarichromic device, comprising the following steps: 1) preparing titanium oxide nanorods; 2) utilizing dye molecules with polymerizable groups Polymerization grafting onto the surface of titania nanorods yields organic-inorganic electrically polarized particles. Specifically, the invention utilizes the surface polymerization reaction of titanium oxide nanorods to graft dye molecules of different colors to realize multi-color organic-inorganic polarized particles and polarized color-changing devices. The organic-inorganic electrode polarized particles of the present invention have the characteristics of simple operation, wide color adjustable range, simple preparation, and easy large-scale preparation; the electrode polarized color-changing device prepared by using it has the advantages of fast response speed and wide color changing range.

The invention relates to a magnetic photochromic photonic crystal material and a preparation method thereof. The preparation method comprises the three steps of (1) preparing monodisperse silica microsphere colloid; (2) synthesizing a functional metal material; (3) preparing the magnetic photochromic photonic crystal material. The preparation method provided by the invention is simple. The photonic crystal material prepared by the method has a core-shell structure; in the structure, silica microspheres are taken as a core, and metal ions attached to the surfaces of the silica microspheres are taken as a shell. The metal ions have superparamagnetism, so that the photonic crystal material also has magnetic response performance. When an appropriate magnetic field is applied to the photonic crystal material, the volume locations or volumes of metallic particles are changed, so that the cluster lattice structure of photonic crystals changes, the position of a photonic forbidden band changes, and the colors of crystals are accordingly changed. Furthermore, the silica microspheres are uniform in structures and good in dispersity; therefore, the prepared nano photonic crystal material prepared by the method has the advantages of being uniform in crystal structure and rich in structural color.

The invention relates to a preparation method of fluorescent test paper for rapidly detecting barium ions. Fluorescent probes are used as color-developing inks, and filter paper is used as a solid-phase carrier by an inkjet printer to uniformly print to obtain fluorescent test paper for detecting barium ions; The fluorescent probe is a blue-light carbon dot functionalized with sodium rhodinate. The invention uses the principle of fluorescence quenching to construct blue-light carbon dots for visual detection of barium ions and has the advantage of a wide range of discoloration. As the concentration of the detected substance changes, the color of the fluorescent test paper changes from royal blue to light blue under the irradiation of a hand-held ultraviolet lamp. The color - light purple - light crimson - gray, can be quickly recognized by the naked eye.