185 results about "Structural coloration" patented technology

The invention provides a polarization selectivity all-dielectric high-saturation structural color metasurface with a maintainable color center. The metasurface sequentially comprises a SiO2 semi-ellipsoid layer, a GaN elliptic cylinder array and a PDMS flexible substrate from top to bottom, wherein the SiO2 semi-ellipsoid layer and the GaN elliptic cylinder array form a periodically arranged double-layer all-dielectric nanostructure unit. Under the condition of x polarization incidence, the structure generates a narrow-band high-reflection structural color in a visible light wave band, the full width at half maximum of a main reflection peak is about 9 nm, the peak reflectivity can reach 99.8% or above, and the reflectivity of a secondary reflection peak on the short wave side is lower than 0.01; and under the y polarization incidence condition orthogonal to the light source, the reflectivity near the corresponding wavelength is lower than 2%, and the light source shows remarkable polarization selectivity. The inventor further finds that when the equivalent radius change of the nano unit causes the reduction of the reflection efficiency, the reflectivity of the main peak can be recovered by adjusting the long-short axis ratio of the GaN elliptic cylinder and the SiO2 semi-ellipsoid, and the central wavelength of the main formant is basically kept unchanged, so that the brightness adjustment is realized on the premise that the color center is basically constant. The structure is suitable for flexible or wearable optical devices, polarization-related structural color display and other applications.

The invention relates to the technical field of optical elements, in particular to a structural color regulation and control device based on silicon nitride metasurface continuous domain bound state enhancement, which comprises a substrate and a metasurface structure arranged on the substrate, the substrate is a silicon dioxide substrate, and the metasurface structure is composed of a plurality of nano-disks which are periodically arranged in a two-dimensional manner. And a circular air hole is formed in the nano plate. Based on the narrow linewidth resonance characteristic of the quasi-BIC, the structural color with high saturation and wide color gamut is realized; by utilizing strong polarization dependence, passive and dynamic regulation and control of color brightness can be realized through simple polarization rotation, and the structure does not need to be changed; silicon nitride has extremely low loss in a visible light band, good compatibility with a silicon dioxide substrate and a stable structure; a high-contrast polarization encryption pattern is easy to realize, and the application prospect in the fields of high-end anti-counterfeiting, information storage, dynamic display and the like is wide; the adopted micro-nano processing technology is standard and mature, and practical preparation and industrialization of the device are facilitated.

The invention relates to the technical field of tool surface functional coatings, in particular to a wear self-monitoring superhard wear-resistant gradient reinforced coating and a preparation method thereof.The coating comprises a metal substrate, a high-entropy wear-resistant layer, a color layer and a transition layer, and the outer layer is a top high-entropy wear-resistant layer; the high-entropy wear-resistant layer is composed of Ti / Al / Zr / Si / Mo-N, and the hardness gradient of the high-entropy wear-resistant layer is 35-55 GPa; the color layer is of an AlTiN / Si (Ti) double-layer structure and has a multicolor structural color, and the hardness of the color layer is 20-35 GPa; the transition layer is a component gradient system. The preparation method adopts multi-target magnetron sputtering, and comprises the steps of substrate pretreatment, layered deposition (wear-resistant layer / color layer / transition layer), top layer deposition and vacuum cooling. By means of the design, the problems that an existing coating lacks self-monitoring, the hardness gradient is narrow, and interlayer stripping is prone to occurring are solved, abrasion visual monitoring is achieved, super-hard abrasion resistance and high binding force (larger than or equal to 85 N) are achieved, different cutting working conditions are adapted, and the service life of a cutter is greatly prolonged.

The invention discloses a preparation method and application of a high-sensitivity temperature-responsive cellulose-based structural color material, and belongs to the field of functional polymer materials. The preparation method comprises the following steps: adding an isopropanol solvent into a certain volume of aqueous solution to obtain an isopropanol dilute solution; hydroxypropyl cellulose is dissolved in an isopropanol dilute solution, a cholesteric liquid crystal structure is formed through self-assembly, a bright structural color is presented, and the hydroxy propyl cellulose structural color material is prepared. A hydroxy propyl cellulose structural color material is uniformly coated on the surface of a polydimethylsiloxane film containing carbon nanotubes, then the transparent polydimethylsiloxane film is used for sealing the hydroxy propyl cellulose structural color material, the temperature sensor with the visual structural color is prepared, and the temperature sensor with the visual structural color is attached to the skin of the human body and can display different colors along with temperature changes. The prepared structural color material is sensitive in response to temperature stimulation, rapid in color change and suitable for human body visual real-time temperature monitoring in the field of intelligent sensing.

The invention provides a colored radiation refrigeration coating as well as a preparation method and application thereof, and belongs to the technical field of building materials. The preparation method comprises the following steps: carrying out self-assembly on a sulfonated cellulose nanocrystal aqueous solution to obtain a colored film; sequentially carrying out heat treatment and crushing on the colored film to obtain structural color particles; mixing the structural color particles with resin to obtain a mixture; and coating a reflecting layer with the mixture to obtain the colored radiation refrigeration coating. According to the colored radiation refrigeration coating and the preparation method thereof, the sulfonated cellulose nanocrystals form an expandable colored coating in a manner of crushing and mixing with resin, so that the problem of brittleness of the cellulose nanocrystals in use is solved, and the obtained colored radiation refrigeration coating can reduce the refrigeration energy consumption in a building use process in summer. The reflectivity of the prepared colored radiation refrigeration coating is 90-93%, the emissivity of the prepared colored radiation refrigeration coating is 87-92%, and a radiation refrigeration effect can be achieved.

The invention discloses a high-refractive-index-difference bottle brush block polymer and a synthetic method of a degradable structural color material, and belongs to the technical field of organic polymers. The end group of the high-refractive-index degradable macromonomer is a cycloolefin derivative capable of performing sequential ring-opening metathesis polymerization reaction (ROMP), and the main chain is a degradable polymer prepared by performing ring-opening copolymerization reaction on styrene oxide (SO) and a comonomer. A series of novel degradable cycloolefin macromonomers are designed and synthesized to replace polystyrene and other non-degradable high-refractive-index polymers commonly used in the field, and the macromonomers and a block copolymer brush are synthesized through ring-opening polymerization and ring-opening metathesis polymerization. And an environment-friendly structural color material capable of covering a full visible light wave band is further prepared by utilizing a phase separation mechanism.

A method is for forming a radiation shield around an object. The method includes providing an inorganic paint pigment comprising a fluid matrix, and paint flakes carried within the fluid matrix. Each paint flake includes a common aluminum mirror layer having a first major surface and a second major surface opposing the first major surface, a first plasmonic aluminum reflector layer carried by the first major surface, and a second plasmonic aluminum reflector layer carried by the second major surface. The method also includes coating an outer surface of the object with the inorganic paint pigment.

The present application relates to the field of multi-modal chiral structural color anti-counterfeiting, and provides a multi-modal micro-scale dome chiral structural color anti-counterfeiting label, a preparation method and application thereof.The multi-modal micro-scale dome chiral structural color anti-counterfeiting label is prepared from a transparent material and has a micro-scale dome structure on the surface, the label pattern can be customized, and the chroma, brightness, chirality and polarization of the pattern color can be programmed and regulated according to requirements.The preparation method of the multi-modal micro-scale dome chiral structural color anti-counterfeiting label is simple, universal, low in cost and suitable for large-scale production.

The application discloses a structural color pressure-sensitive film based on a hollow polymer colloidal photonic crystal and a preparation method and application thereof, and belongs to the technical field of force-induced color-changing materials. The preparation method of the structural color pressure-sensitive film comprises the following steps: (1) uniformly dispersing core-shell nano colloidal particles in an organic solvent to obtain a colloidal particle dispersion liquid; the shell layer of the core-shell nano colloidal particles is a polymer material, and the core layer is an inorganic oxide; (2) coating the colloidal particle dispersion liquid on the surface of a flexible substrate, and obtaining a precursor photonic crystal film after heating; and after removing the core layer of the core-shell nano colloidal particles in the precursor photonic crystal film by acid treatment etching, the structural color pressure-sensitive film is obtained. The preparation method of the structural color pressure-sensitive film is simple, the conditions are mild, and no pigment dye molecules are needed; by utilizing the pressure deformation and shape memory characteristics of a single hollow polymer colloidal particle itself and the inherent structural color characteristics of a photonic crystal, the structural color pressure-sensitive film can realize the regulation and memory of rich and high-saturation structural colors under the action of pressure.

A cosmetic composition having a pearlescent effect, according to one aspect, provides a pearlescent effect without a pearlescent pigment so as to improve aesthetics, can be used in various formulations such as low-viscosity skin formulations, can exhibit structural colors, and has excellent long-term formulation stability.

The application provides a preparation method of a security label and the security label, and the preparation method comprises: sequentially forming a first security structure and a second security structure in a laminated arrangement on a surface of a substrate, forming the first security structure comprises forming a perovskite film on the surface of the substrate, the perovskite film can be irradiated by a first light beam to present a first preset pattern, and forming the second security structure comprises forming a structural color film on a side of the perovskite film away from the substrate, the structural color film can be irradiated by a second light beam to present a second preset pattern. Wherein, the structural color film is formed by irradiation light sequentially irradiating through a first mask plate and a second mask plate, a mask pattern of the first mask plate is the same as the second preset pattern, and the second mask plate is a first-pitch grating, so that the structural color film presents a microarray structure, based on the microarray structure, the structural color pattern and the fluorescent pattern can be selectively hidden and displayed, and then information encryption of the security structure is realized.

The invention relates to a method for preparing a structural color pattern by using a melanin photon material, and belongs to the technical field of structural colors. The method comprises the following steps: S1, under an alkaline condition, carrying out a reaction on PS microspheres and dopamine hydrochloride in a tris (hydroxymethyl) aminomethane-hydrochloric acid buffer solution, and centrifuging to obtain PS (at) PDA microspheres; s2, the PS (at) PDA microspheres are prepared into PS (at) PDA microsphere dispersion liquid, the PS (at) PDA microsphere dispersion liquid is dropwise added to the surface of a silica gel plate, and PS (at) PDA structural color pellets are obtained through drying treatment; and S3, the PS-coated PDA structural color pellets are prepared into PS-coated PDA structural color pellet dispersion liquid, atomization deposition is conducted through a mask technology, and a structural color pattern is obtained. By regulating and controlling the particle size of the PS microspheres and the thickness of the PDA shell layer, the structural color material with uniform color and high color visibility and saturation can be prepared, and finally the preparation of the full-chromatographic structural color covering the whole visible spectrum area is realized.

The application discloses a preparation method of a three-dimensional ordered metal oxide inverse opal photonic crystal film. The method comprises the following steps: mixing polystyrene microspheres and corresponding solvents in proportion to obtain a microsphere emulsion for standby; under constant temperature environment conditions, a vertical deposition self-assembly method is adopted to obtain a large-area ordered photonic crystal template on a substrate, wherein by adjusting the mass of glycerol, the cracking phenomenon of the template can be reduced; on the basis of the photonic crystal template, a metal precursor solution is filled into the template pores, the template microspheres are removed, and finally an inverse opal photonic crystal film containing periodically arranged holes is obtained. The application can be used for the preparation of templates and inverse opals of all sizes of PS balls. The prepared photonic crystal template has the advantages of few structural defects, high ordered arrangement, low method cost, high repeatability and strong applicability, and the prepared high-quality photonic crystal film has stable structural color.

The invention discloses a color structured light 3D camera using a coaxial light path and a calibration method thereof, and relates to the field of structured light cameras, the color structured light 3D camera comprises a camera body arranged right above a measured object, and an imaging structure, a color modulation structure and an embedded processing chip are integrated in the camera body. Compared with an existing structured light 3D camera, the structure light 3D camera has the advantages that the parallax error caused by inclined installation is eliminated by adopting the camera upright layout, and the spatial positioning precision of 2D color information is improved; through a coaxial optical path design, optical path multiplexing of a structured optical channel and a color channel is realized on the premise of not increasing the size of equipment; a CMOS monochromatic high-speed sensor is selected, the problem of resolution loss caused by three-channel information interpolation of a Bayer array sensor is avoided, and meanwhile high-precision collection of color information is achieved through time-sharing exposure.

The application provides a fluorescent structural color anti-counterfeiting material and a preparation method thereof, and the preparation method comprises the following steps: preparing composite fluorescent particles of mesoporous silica microsphere loaded halogen perovskite fluorescent particles CsPbX3, wherein X is Br, Cl or I; mixing the composite fluorescent particles with monodisperse silica nanoparticles, resin, a solvent, an initiator and an additive to obtain a mixture, wherein the volume percentage of each component in the mixture is as follows: 25-65% of the nanoparticles, 35-75% of the resin, 0.01-10% of the initiator, and 5-90% of the solvent, and the mass of the composite fluorescent particles is 0.01-3% of the mass of the silica nanoparticles; performing rotary evaporation on the mixture under vacuum to obtain concentrated paint, and after photocuring or thermal curing, the anti-counterfeiting material is obtained. The anti-counterfeiting material of the technical scheme has the dual anti-counterfeiting effects of structural color anti-counterfeiting under natural light and fluorescent anti-counterfeiting under ultraviolet excitation.

The invention relates to the field of electrochemical sensors, and provides photonic crystal hydrogel and a preparation method thereof, a wearable sweat sensor and application. The photonic crystal hydrogel is suitable for detecting the concentration of potassium ions in sweat, and the structural color of the photonic crystal hydrogel can change along with the change of the adsorption quantity of the potassium ions in the sweat so as to characterize the concentration of the potassium ions in the sweat. When the photonic crystal hydrogel is used for detecting the concentration of potassium ions in sweat, the operation is simple, the cost is low, and the consumed time is short.

The invention discloses black tea or coffee extract reinforced HPC photon gel as well as preparation and application thereof. The preparation method comprises the following steps: mixing a black tea or coffee water extracting solution with HPC to obtain a mixed solution; and carrying out water bath on the mixed solution at 25-35 DEG C for 1.5-2 hours, fully stirring the obtained mixed solution to uniformly distribute the components, then centrifuging at room temperature to remove bubbles, and storing the centrifuged gel until the structural color is uniform to obtain the black tea or coffee extract reinforced HPC photon gel. The invention provides application of the black tea or coffee extract reinforced HPC photon gel as a 3D printing material. The black tea and coffee water extract is introduced as the background color of the HPC photonic gel, so that the visual recognition degree of the HPC structural color can be improved; meanwhile, the HPC photon gel material is endowed with the functional characteristics of antioxidant activity and the like; in addition, the gel material has the characteristic aroma of black tea or coffee at the same time.

The application discloses an oily structural color pigment ink and application thereof, and belongs to the technical field of photonic crystal material preparation. Components of the oily structural color pigment ink include at least one block polymer brush, at least one resin or at least one precursor of the resin, and at least one organic solvent. The oily structural color pigment ink provided by the application is a layered structural color material obtained by self-assembly based on the microphase separation principle of the block polymer brush. The provided oily structural color pigment ink can be compatible with most common pigment coloring methods, including but not limited to screen printing, spraying, inkjet printing and intaglio printing. The structural color of the oily structural color pigment ink is not limited to the visible light band, and covers ultraviolet spectrum, visible spectrum and infrared spectrum, and the wavelength range of the covered electromagnetic spectrum is 200 nm to 2000 nm.

The invention relates to a plastic composition which is characterized by comprising the following components in parts by weight: 88-100 parts of polymer resin; 0.1 to 2 parts of a compound laser marking agent; 0.02-1 part of a black coloring agent; 0.2-1 part of an organic color pigment; the compound laser marking agent is selected from compounding of an ultraviolet laser sensitive agent, a near-infrared laser sensitive agent and a far-infrared laser sensitive agent. By compounding the laser marking agent, ultraviolet laser marking, near-infrared laser marking and far-infrared laser marking can be achieved at the same time, the composition can be induced to generate different optical effects such as pigment color and / or structural color, permanent marks of multiple colors (laser marks of at least two colors) are formed on a single base material, the process is simple and efficient, and the cost is low. And the marking effect is bright and the anti-counterfeiting property is strong.

The invention relates to the field of structural color materials, and discloses polymerization-induced phase separation total internal reflection structural color microspheres as well as a preparation method and application thereof. The method comprises the following steps: mixing an epoxy vinyl monomer, a fluorocarbon which cannot be subjected to polymerization reaction and a photoinitiator to obtain an oil-phase mixture; the epoxy vinyl monomer and the fluorocarbon are mutually soluble, and the fluorocarbon does not participate in polymerization; the preparation method comprises the following steps: adding a first surfactant and a second surfactant into water, and mixing to obtain a water-phase mixture; and mixing the oil-phase mixture and the water-phase mixture to form homogeneous-phase emulsion liquid drops, and irradiating the homogeneous-phase emulsion liquid drops under ultraviolet light to obtain the total internal reflection structural color microspheres. The total internal reflection structural color microspheres are prepared by optimizing the composition of two phases of Janus liquid drops and introducing ultraviolet light to initiate monomer polymerization and drive the monomers to be subjected to phase separation from emulsion liquid drops, the preparation process is simplified, cosolvent dissolution is not needed, and the requirements of large-scale industrial production can be met.

To provide structural color pigments that can be manufactured more inexpensively, and to provide a more inexpensive manufacturing method for such structural color pigments.SOLUTION: There is provided a structural color pigment comprising, in sequence, a flat substrate, a crystalline layer, and a nanorod layer containing multiple nanorods, wherein the crystalline layer contains metal oxides and the nanorod contains one or more selected from the group consisting of metal oxides, metal hydroxides, and metal oxide hydroxides, and an average tilt angle of the long axis of the nanorods is within the range of ±30 degrees relative to the plane of the flat substrate (0 degrees).SELECTED DRAWING: Figure 1

The application discloses a preparation method of hollow photonic crystal structural color glaze. The method uses monodisperse polystyrene latex balls as the main body, arranges the three-dimensional photonic crystal structure coating through a coating process, fills the gaps between the three-dimensional photonic crystal balls with inorganic materials and organic high-temperature-resistant materials as the main filling materials, and obtains the photonic crystal structural color glaze with a metallic visual effect after the photonic crystal coating after the filling is sintered at a high temperature of 350-1500 DEG C and a reverse opal three-dimensional photonic crystal structure is generated. The preparation method using the structural color principle to obtain the decoration effect can be applied to the existing ceramic, glass, metal and other product industries on a large scale, so that the products have better decoration effects.

This invention discloses a method for fabricating a photonic crystal hydrogel film sensor with a self-reporting elastic modulus function and its application. The method involves fabricating a hydrogel film with a periodic photonic crystal structure and constructing a bio-interface on its surface that can dynamically regulate cell adhesion, detachment, spreading, migration, proliferation, and differentiation. An optical imaging system is used to acquire images of the structural color changes of the photonic crystal hydrogel film. Image processing extracts color parameters, which are then converted into changes in reflected wavelength and the film deformation field. The elastic modulus of the film is calculated by inverting the deformation field generated by microspheres of known mass placed on the film surface, combined with an elasticity model. By combining the cell-interface interaction deformation field, the cell-interface interaction force and its spatial distribution can be obtained. A photonic crystal hydrogel film sensor with a self-reporting hardness function is constructed. This method achieves integrated biomechanical research combining dynamic regulation and real-time monitoring, offering advantages such as non-destructive operation, real-time imaging, and acquisition of mechanical spatial distribution.

The application discloses a phosphorescent dye and a triple anti-counterfeiting photonic crystal film containing the phosphorescent dye, and preparation and application of the triple anti-counterfeiting photonic crystal film. The photonic crystal film contains a new phosphorescent dye component, and the photonic crystal film is endowed with phosphorescent anti-counterfeiting characteristics and phosphorescent long-life anti-counterfeiting characteristics, and further endowed with the structural color anti-counterfeiting characteristics of the photonic crystal itself, so that the photonic crystal film exhibits triple anti-counterfeiting characteristics, effectively solves problems of easy counterfeiting, complex anti-counterfeiting equipment and single anti-counterfeiting mode of existing anti-counterfeiting technologies, and the prepared anti-counterfeiting pattern is simple and easy to identify and has strong anti-counterfeiting specificity.

A structural color image includes a metallic layer, a nanocomposite film, and a dielectric layer between and in direct contact with the metallic layer and the nanocomposite film. The metallic layer reflects visible light. The nanocomposite film reflects visible light and includes metallic nanoparticles in a polymeric material.

The application discloses a kind of self-adapting bimodulus photoelectric gel interface materials and its preparation method and application, belong to flexible electronic material and wearable human-computer interaction system technical field, the application is by introducing SiO2 photonic crystal structure into hydrogel, and doping ionic liquid [EMIm]Cl, so that the self-adapting bimodulus photoelectric gel interface material prepared has optical and electrical double signal sensing function.The application is based on betaine zwitterionic hydrogel and SiO2 photonic crystal structure, with high conductivity, frost resistance and water retention capacity, realize strain-resistance-structural color signal synergistic regulation and control.The self-adapting bimodulus photoelectric gel interface material prepared by the application has better tensile rate, can be fitted to skin, has high sensitivity and fast response of micro-strain, has sensitive electrical signal transmission ability and high transparency, avoids the influence on structural color, and has gorgeous structural color, has strong frost resistance and good stability.

This invention discloses a colored radiative cooling thin film based on Fano resonance and its preparation method. The thin film comprises a structure stacked sequentially from bottom to top: M1D1M2D1AD'. The structure of the thin film is asymmetric, where M1 represents a first metal layer, M2 represents a second metal layer, A represents an absorption layer, D1 represents a first dielectric layer, and D' represents a symmetrical dielectric layer unit. The M1D1M2 structure is a discrete state, serving as a narrowband light absorber, while the M2D1AD' structure is a continuous state, serving as a broadband light absorber. D' serves as a continuous antireflection layer. The narrowband and broadband light absorbers are coupled through a shared second metal layer M2, achieving Fano resonance. This invention features a high-purity, tunable reflective structural color, high reflectivity in the solar spectrum, and high emissivity in the atmospheric window, thus achieving excellent radiative cooling effects.

The application discloses a dynamic anti-fake and information encryption method based on time-dependent structural color. A thin film sample with structural color is prepared by mixing a photoresponsive polymer and a functional small molecule in proportion to form a host-guest system, and the sample is used as an anti-fake label or an information carrier. The sample is heated at a specific temperature, and the structural color state can change over time, thereby realizing the functions of dynamic anti-fake and double-lock information encryption. The application utilizes the phenomenon that cis isomers revert to trans isomers during the heating process, and the trans isomers subsequently self-assemble, thereby accurately controlling the whole process of the structural color state change. On this basis, by adjusting the host-guest ratio of the system, multiple information display can be realized, that is, the same information can appear multiple times on a time scale, and only when the whole process of the structural color state change and the decoding method are obtained, the information can be decrypted. The double-lock strategy significantly improves the security of information encryption, and has a wide application prospect.

The invention provides a photo-thermal regulation and control multilayer film and a preparation method thereof, and belongs to the technical field of optical films, the film comprises a fourth film layer, a third film layer, a second film layer and a first film layer which are sequentially sputtered and deposited on the surface of a graphite substrate from bottom to top; wherein the first thin film layer and the second thin film layer are used for realizing visible light structural color regulation and mechanical protection, the third thin film layer is used for realizing directional radiation of a target angle in a medium and long infrared band, and the fourth thin film layer, the third thin film layer, the second thin film layer and the first thin film layer form a Fabry-Perot resonant cavity. Therefore, the wave absorbing performance of the whole film in a medium-long infrared band can be regulated and controlled. The photo-thermal regulation and control multi-layer thin film successfully realizes organic coupling of mechanical protection, visible light structural color regulation and control, and medium and long infrared directional radiation and radiation heat dissipation.

The glass assembly applied to the BIPV curtain wall comprises a transparent substrate and a microcavity array layer arranged on the surface of one side of the transparent substrate, and the microcavity array layer comprises a plurality of microcavities arranged in an array; the micro-cavity is filled with the solid filling body, and the refractive index of the solid filling body and the depth of the micro-cavity are suitable for enabling the glass assembly to present a structural color through optical interference; the glass assembly further comprises a sealing layer, so that the microcavity array layer is sealed between the sealing layer and the transparent substrate. According to the glass assembly and the photovoltaic assembly applied to the BIPV curtain wall, the light transmittance can be improved, and meanwhile, the color stability and reliability can be guaranteed.