294 results about "Structural coloration" patented technology

The invention belongs to the technical field of intelligent materials, and in particular relates to carbon nanotube based stress-discoloring photonic crystal fibers and a preparation method thereof. The preparation method comprises the following steps: winding a height-oriented carbon nanotube as a conducting layer outside stretchable elastic polymer fibers serving as a substrate; depositing polymer microspheres by using an electrophoretic deposition method to form a photonic crystal with a periodic structure; then packaging the photonic crystal in a transparent elastomer; and finally, swelling the transparent elastomer to prepare the stress-discoloring photonic crystal fibers. The structural color of the photonic crystal fibers can be regulated and controlled by virtue of the particle size of the polymer microspheres and the sphere center distances among the microspheres. During stretching and restoring, the structural color of the photonic crystal fibers changes quickly and reversibly and comprises red, green and blue, and the color still changes quickly and stably even though the fibers are stretched for one thousand times. The photonic crystal fibers not only can be woven into many fabrics to show various patterns but also can be used as a sensor.

An indication member having an original structural color, is provided with an indication layer to cause a structural color change irreversibly by receiving a stimulus from the outside so as to exhibit another structural color different from the original structural color. The another structural color obtained by the structural color change is not reversed to the original structural color.

The embodiment of the invention provides a manufacturing method of contact lenses having a photonic crystal structural color. The manufacturing method comprises the steps that (1) a femtosecond-pulse two-photon polymerization method is utilized to make photonic crystal structure layers on contact lens molds to obtain the contact lens molds with photonic crystal structures; (2) a contact lens prepolymer solution is added into the contact lens molds to obtain raw contact lens pieces with photonic crystal layers in a nanoimprint lithography or polymerization curing mode; (3) the raw contact lens pieces with the photonic crystal layers are arranged in saline water to be soaked till the expansion rate is stabilized and constant, and the contact lenses having the photonic crystal structural color are manufactured. According to the manufacturing method, a two-photon technology is introduced to manufacture the contact lens molds with the photonic crystal structures, and the good-safety and high-reliability contact lenses having the structural color can be manufactured by utilizing the molds in a low-cost and high-yield mode. The embodiment of the invention further provides the contact lenses prepared by means of the manufacturing method and having the photonic crystal structural color.

The invention discloses a method for preparing a structural color film based on a layer-by-layer assembly technology. The invention also discloses a structural color film based on the layer-by-layer assembly technology and application of the structural color film in the field of bio-sensing detection. The preparation method is simple and effective, the operation is easy and convenient, and the required time is short. The prepared structural color film based on the layer-by-layer assembly technology has response on external stimulation, has wide prospects in the field of bio-sensing detection and is high in controllability, and color of the prepared film can be controlled by controlling the rotating speed and solution concentration.

The invention discloses a method for preparing a large-area structural coloration pattern by ink-jet printing. According to the method, high-reflective-index monodisperse colloidal microspheres, a high-boiling additive, ethanol, glycerol, a surfactant, a defoamer, adhesive, a pH adjusting agent and deionized water are mixed, and ink obtained through ultrasonic dispersion is injected into an ink cartridge of an ink jet printer for printing. According to the method, the high-reflective-index monodisperse colloidal microspheres are evenly deposited on paper through a common ink jet printer, and a short-range order and long-range disordered microstructure is obtained; and due to the mutual effect of the nanometer microspheres with different grain diameters and light, the structural color pattern with different colors can be obtained, the preparation of the large-area structural color pattern is achieved, the method is high in expansibility, and the method has the wide application prospects on the aspects of the display, security and the like.

The invention discloses a method for preparing a multilevel structure with a compound period through variable angle exposure and application, belongs to the technical field of laser processing, and particularly relates to preparation of a micrometer-nanometer cross-scale multilevel structure with a compound period through double-beam interference. The compound period and the multilevel micrometer-nanometer structure are obtained at the same time through the changing of exposure angles of double-beam interference, and a super-hydrophobic surface and a structural color for imitating insect wings are obtained through the micrometer-nanometer cross-scale multilevel structure and the compound period. According to the method, the multilevel structure is obtained through only double-beam interference processing technology by adopting variable angle exposure, the limitation that the prior art is required to be combined with a plurality of methods to prepare the multilevel structure is broken, and the method has the advantages of high expansibility, high yield, high efficiency and the like.

The invention discloses an anisotropic structural color hydrogel film based on reduced graphene oxide doping, and a preparation method thereof, and applications in detection of myocardial cells. According to the invention, the grow areas of cells are controlled by using the difference of the cell adhesion rates of different hydrogel materials, and a specific pattern is copied on the surface of thematerial to achieve the functional partition of photonic crystal sensing and cell directional growth, so that the reduced graphene oxide doped hydrogel film with the anisotropic structure color is prepared; compared with the method in the prior art, the preparation method provided by the invention is simple to operate and low in cost, and does not need a large detection instrument; and the prepared anisotropic structure color hydrogel film has advantages of good biocompatibility, stable optical characteristics, flexible adjustability and efficient sensing properties, does not depend on a large detection instrument, and can realize naked eye observation of beating frequency and contractility of myocardial cells.

The invention discloses a repeatably erasable photonic crystal structure color-based anti-counterfeiting film and a preparation method and application thereof. The method comprises the following steps: soaking a photonic crystal film of cellulose nanocrystalline in a mixed solution of an ionic liquid methacryloyloxyethyltrimethyl ammonium chloride, a cross-linking agent, an initiator and absoluteethyl alcohol, after illumination polymerization, covering an anti-counterfeiting film with a hollow patterned polyester film, dropwise adding a solution containing at least one hydrophobic anion of ClO4<->, Tf2N<-> or PF6<-> to obtain a structural color anti-counterfeiting film loaded with hidden patterns in a natural state, responding to obtain complete corresponding pattern information under water stimulation, and soaking the anti-counterfeiting film in a soluble chlorine salt solution so that the hidden patterns can be wiped off. According to the invention, hydrophobic ions and hydrophilicions are exchanged to prepare the anti-counterfeiting film which has high sensitivity, reversible erasing, writing, displaying and hiding functions and certain mechanical strength, so that wiping andrecoding of information are realized.

The invention relates to the field of display material preparation, in particular to a thermochromic photonic crystal film in a body temperature area and a preparation method thereof. The photonic crystal film is of a 1D chain-shaped photonic structure formed by taking hydrophilic glass as a substrate and temperature-sensitive responsive gel as a matrix and embedding monodisperse Fe3O4-coated PVPcolloid nanoparticles into the matrix for magnetic assembly. The technical characteristics and excellent effects of the thermochromic photonic crystal film are as follows: 1) the preparation method issimple and easy to operate; 2) the photonic crystal film can be used as a naked eye observation criterion before temperature detection of the body temperature area; 3) the thermochromic photonic crystal film in the body temperature area is prepared; the color-changing temperature ranges from 36.0 DEG C to 42.0 DEG C, the covering temperature range is wide, corresponding changes of the structuralcolor can be caused by changes of the temperature of 1 DEG C, and the thermochromic photonic crystal film has the advantages of being high in temperature perceptibility and good in naked eye recognizability and has good application prospects in the fields of body temperature detection, disease diagnosis and the like.

The invention relates to a temperature-controlled structural color dye, and preparation and application thereof. The temperature-controlled structural color dye has a core-shell structure taking a monodisperse microsphere as a shell and a phase change material as a core. The preparation method comprises the following steps: diluting a latex particle aqueous solution having the core-shell structuretaking the monodisperse microsphere as the shell and the phase change material as the core to a concentration of 0.1 to 10 percent by weight, and uniformly and ultrasonically dispersing the latex particle aqueous solution, and then self-assembling the latex particle aqueous solution on a base material. Good temperature regulation performance is imparted to a structural color material without affecting the optical properties and color of the obtained structural color, and the temperature-controlled structural color dye has broad spectrum applicability to different compositions and structural base materials; the process is simple, and the preparation cost is reduced; the temperature-controlled structural color dye is high in universality and has a good application prospect.

The invention discloses red low-angle-dependence zinc sulfide structure color materials and a preparation method thereof, and belongs to the technical field of photonic crystal material preparation. The preparation method comprises the steps that firstly, zinc sulfide microsphere nanoparticles with the uniform particle size are prepared by adopting a chemical homogeneous precipitation method; secondly, the zinc sulfide microsphere nanoparticles are calcinated under protection of a reducing atmosphere to carbonize trace organic substances, and then the red structure color materials with carbon black evenly distributed are obtained. According to the red low-angle-dependence zinc sulfide structure color materials and the preparation method thereof, the preparation method is simple and high in repeatability, and the technical problems that chemical organic substance color materials are prone to discoloring and harmful to a human body are solved; the technology operation process is simple and easy to operate, large-scale industrial production can be achieved, the method is suitable for construction of angle-free different-color structure color materials on the surfaces of various materials, and the wide application prospect is achieved; the prepared red zinc sulfide photonic crystal structure color materials are even in carbon black distribution, free of angle dependence, good in sphericity degree and uniform in particle size and have the wide application prospect on the fields of material displaying, sensing, catalyzing, various material surface coloring and the like.

The invention discloses a polarization-controlled surface plasmon bifunctional metasurface and a design and preparation method thereof. The metasurface longitudinally adopts a metal-medium-metal three-layer structure, the surface includes a trapezoidal unit structure array, independent regulation and control of the amplitude and the phase of light in different polarization states are achieved, phase regulation and control can be conducted on polarized light in the x direction, and the function of a deflector is achieved. Amplitude regulation and control can be carried out on polarized light inthe y direction to achieve a structural color function. According to the bifunctional structure, the integration level and the regulation and control diversity of the metasurface structure are improved, deflection and structural color are independent of each other and supplement each other, and the combination of the two functions provides a brand-new solution for anti-counterfeiting, measurementof birefringence of biological tissue and measurement of optical rotation of biomolecules.

The present disclosure provides an optical film, a structural colored pigment, and a method for preparing an optical film. The optical film includes a multilayer film. The multilayer film includes films with high refractive indexes and films with low refractive indexes alternately arranged in a multilayer manner, and a middle film. Some of the films with the high refractive indexes and some of the films with the low refractive indexes are disposed on a side of the middle film, constituting first other films. Optical thicknesses of films having a same refractive index in the optical films and an optical thickness of the middle film are all different or partially different.

The invention discloses an absorption interference type all-dielectric structure color film, which includes an interference film that comprises an absorption type dielectric material layer and a visible light band transparent dielectric material layer; the refractive index of the absorption type dielectric material layer in the visible spectrum 380-760 nm band is 1.8-4, the extinction coefficientis 0.01-2, and the refractive index of the visible light band transparent dielectric material layer is less than 1.7. The all-dielectric structure color film can form a reflective high-saturation thinfilm structure color, has the characteristics of excellent color saturation, different colors along with angles and environmental friendliness, and is free of a complex photoetching process.

The invention discloses a method for preparing a butterfly-scale-structure material through micro-nano laminated film slitting. The method comprises the following steps that 1, micro-nano laminated films are subjected to layered lamination and extrusion film forming to be machined into composite thin films with the thickness ranging from 30 micrometers to 100 micrometers; 2, the simple-layer films obtained in the first step are slit into continuous butterfly-scale-structure material flat filaments through a thin film slitter; 3, each continuous butterfly-scale-structure material flat filament serves as a group and is heated through a heating device; 4, the continuous butterfly-scale-structure material flat filaments obtained in the third step are output to a winding forming device, and continuous butterfly-scale-structure material flat filament bobbins are prepared. According to the method for preparing the butterfly-scale-structure material through micro-nano laminated film slitting, by means of the characteristic that a color effect generated by special micro-nano structures on butterfly wings is a typical structural color, an important research direction is opened in bionics.

Materials for, and methods of, colorizing a metallic surface with micro-gratings using vibration cutting technologies are provided. Micro-gratings on aluminum, brass, and stainless steel surfaces can be rapidly created to effect, under illumination, at least one color observable in the visible spectrum using elliptical vibration texturing, a vibration-assisted mechanical cutting process. The modified metallic surface can display multiple visible colors, an iridescent effect caused by changes in one or more cutting parameters employed to produce the micro-gratings, the angle of illumination by an incident light, and/or the viewing angle of the surface under illumination.

The invention provides a structural color functional nanostructure and a preparation method thereof, and the structure comprises: a dielectric substrate; a metasurface structure which is positioned on the dielectric substrate and is used for selectively reflecting incident light; wherein the metasurface structure comprises: a metal film which is located on a dielectric substrate, a dielectric layer which is located on the metal film; and a metal nanoparticle array which is positioned on the dielectric layer.

The invention relates to a preparation method of photonic crystal microspheres based on multi-shell nanoparticles. The photonic crystal microspheres are formed by self-assembly of the multi-shell nanoparticles. According to the preparation method of the multi-shell nanoparticles, under the assistance of an adhesive polymer material, the surface of original unmodified nanoparticles is coated with amaterial with light absorption capacity, and the multi-shell nanoparticles encapsulated layer by layer are obtained through multiple times of repeated operation. Under the assistance of an adhesive material, the peripheries of the original unmodified nanoparticles are coated with a light absorption material layer by layer to obtain the multi-shell nanoparticles, so that the photonic crystal microspheres composed of the nanoparticles have optimized structural color. The method disclosed by the invention is simple, controllable in parameters and high in repeatability, and has great applicationprospects in the fields of biochemical detection, counterfeiting prevention, cell capture and the like.