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Morphology-controllable and color angle-independent photonic crystal particle and preparation method thereof

A photonic crystal and angle-free technology, which is applied in the field of photonic materials and structural color materials, can solve the problems of high difficulty in particle shape regulation, low cost, and extended preparation time of oil phase, and achieve the elimination of color angle dependence and simple regulation Effect

Inactive Publication Date: 2015-12-23
HEBEI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above process has the following disadvantages: first, the color of the photonic crystal material obtained by assembling two kinds of microspheres with different particle sizes is dim; Bring environmental problems; Third, the regulation of particle morphology is difficult, and most of the reported in the literature are spherical
In addition, at high temperatures, the use of Leidenfrost droplet templates can avoid the use of oil phases (C.H.Lim, et.al. Langmuir2014, 30, 8350-8356), but relatively high energy consumption
It is still a great challenge to develop a low-cost and simple method for preparing photonic crystal particles with controllable shape and color without angle dependence.

Method used

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  • Morphology-controllable and color angle-independent photonic crystal particle and preparation method thereof
  • Morphology-controllable and color angle-independent photonic crystal particle and preparation method thereof
  • Morphology-controllable and color angle-independent photonic crystal particle and preparation method thereof

Examples

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Embodiment 1

[0028] In the monodisperse poly(styrene-methyl methacrylate-acrylic acid) polymer colloidal microsphere emulsion with a particle size of 265 nm and a mass fraction of 40%, add a mass fraction of 2% Fe with a particle size of 15 nm. 3 o 4 The microparticles were ultrasonically dispersed, and then the emulsion was drop-coated on clover leaves with a contact angle with water of 150.6° to form emulsion droplets, and the size of the emulsion droplets was 1500 μm. Drying at a temperature of 40°C and a humidity of 40%, the monodisperse colloidal microspheres self-assemble to form spherical photonic crystal particles with a size of 1400 μm. Its color is red, and does not change with the viewing angle (0 o ~75 o ) changes (such as figure 1 ). Its photonic bandgap is located at 679nm and does not change with the collection angle (0 o ~75 o ) changes (such as figure 2 ). The edges of photonic crystal particles have a face-centered cubic periodic structure ( image 3 ). The in...

Embodiment 2

[0030] In the monodisperse poly(styrene-methyl methacrylate-acrylic acid) polymer colloidal microsphere emulsion with a particle size of 80nm and a mass fraction of 5%, add 0.1% of Fe with a particle size of 2nm 3 o 4The microparticles were ultrasonically dispersed, and then the emulsion was sprayed onto the lotus leaf with a water contact angle of 180° to form emulsion droplets, and the size of the emulsion droplets was 11 μm. Drying at a temperature of 15°C and a humidity of 15%, monodisperse colloidal microspheres self-assemble to form a size of 10 μm and a photonic band gap of 200 nm (acquisition angle, 0 o ~75 o ) of concave spherical photonic crystal particles.

Embodiment 3

[0032] In the monodisperse silica colloidal microsphere emulsion containing 60% of the particle size of 1100nm mass fraction, adding 5% of Fe with a particle size of 50nm 3 o 4 The microparticles were dispersed by ultrasonic, and then the emulsion droplets were applied to the leaves of violets with a contact angle of 150° to form emulsion droplets, and the size of the emulsion droplets was 1600 μm. Drying at a temperature of 90°C and a humidity of 90%, the self-assembled monodisperse colloidal microspheres have a size of 1500 μm and a photonic band gap of 2500 nm (acquisition angle, 0 o ~75 o ) of spherical photonic crystal particles.

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Abstract

The invention discloses a morphology-controllable and color angle-independent photonic crystal particle and its preparation method. The preparation method comprises the following steps: mixing Fe3O4 nanoparticles, carbon black nanoparticles, graphene nanoparticles or a mixture of the Fe3O4 nanoparticles, carbon black nanoparticles and graphene nanoparticles with an emulsion containing monodisperse colloidal microspheres; printing a mixture obtained onto a superhydrophobic substrate by a spraying, dispensing or inkjet mode so as to form emulsion droplets with diameter being 11microns -1.6 mm; and drying to obtain the ellipsoidal color angle-independent colored photonic crystal particle with its length-diameter ratio being controllable. The photonic crystal particle is colourfast and environmentally friendly and has a wide application prospect in fields of pigment, display, sensing and the like.

Description

technical field [0001] The invention relates to a photonic crystal particle, in particular to a photonic crystal particle whose appearance is controllable and whose color has no angle dependence and a preparation method thereof, belonging to the technical field of photonic materials and structural color materials. Background technique [0002] Obtaining stable color without chemical bleaching or photobleaching is a core goal in the fields of coatings, cosmetics, and display information technology. The above-mentioned long-lasting and stable colors can be realized by non-absorbing nanostructures that selectively reflect light waves. The colors caused by special nanostructures are called structural colors, and the corresponding materials are called "structural colors". materials or photonic crystal materials. Colloidal particles are ideal substances for preparing "structural color" materials or photonic crystals because they are cheap and their optical properties can be easil...

Claims

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Application Information

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IPC IPC(8): C30B29/60C30B5/02
Inventor 周金明杨静谷占东张国福魏雨
Owner HEBEI NORMAL UNIV
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