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Transparent composite photonic crystal material and preparation method and application thereof

A photonic crystal, transparent technology, applied in the field of polymer materials, can solve the problem that light scattering elements are not periodically arranged

Active Publication Date: 2018-07-17
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the light scattering elements are not periodically arranged

Method used

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  • Transparent composite photonic crystal material and preparation method and application thereof
  • Transparent composite photonic crystal material and preparation method and application thereof
  • Transparent composite photonic crystal material and preparation method and application thereof

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Embodiment Construction

[0096] Hereinafter, the present invention will be further explained through preferred implementation cases in conjunction with the accompanying drawings.

[0097] The present invention has designed a transparent photonic crystal (transparent photonic crystal, TPC) material, using a transparent photonic crystal material and a method for manufacturing a transparent photonic crystal material to realize a large area TPC film, which can be completely reversibly in an initial highly transparent state And the structure changes between the state of coloring. This interesting photonic crystal material can be composed of regularly arranged core-shell particles with polymer core and composite shell components whose refractive index matches exactly. These particles can create a highly transparent photonic crystal film, which can be spatially cross-linked by UV irradiation, providing invisible photon patterns with different solvent responses compared to non-cross-linked areas. These TPC film...

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Abstract

The invention belongs to the technical field of polymer materials, in particular to transparent photonic materials and a preparation method and application thereof. The transparent photonic materialsmainly comprise two materials. The particles of the first material are arranged in a three-dimensional periodic structure in the matrix of the second material, and the materials are transparent in aninitial state. Under an external stimulation condition, the refractive indexes of the two materials change accordingly. Thus, the transparent materials are converted into colored materials such that an encrypted photon pattern with different responses is provided. For example, the transparent photonic materials can be immersed in a solvent in order that an image or character encrypted on the photonic crystal structure is displayed as a universal colored pattern. The invention also provides the application of the transparent photonic materials as a sensor device in the field of safety and anti-counterfeiting application, such as specifically for manufacturing a large-area transparent photonic crystal film, which can be completely reversibly switched between a highly transparent state and astructural color state.

Description

Technical field [0001] The invention belongs to the technical field of polymer materials, and specifically relates to a transparent photonic material and a preparation method and application thereof. The present invention has specific but not exclusive applicability to materials that change color in response to external stimuli, such as sensors and security anti-counterfeiting applications. Background technique [0002] Photonic crystal materials with bright structural colors are widely present in nature, such as insects such as butterflies, flowers and even natural opal gems. On the other hand, some animals, such as chameleons, certain beetles, or octopuses have the ability to adjust the color of their skin according to the surrounding environment. [0003] On the microscopic scale, natural opal is composed of silica spheres with a diameter of 150 to 300 nm, arranged in a close-packed face-centered cubic (fcc) lattice structure. Because the distance between the stacking planes o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/00C08F220/14C08F222/14C08F220/18
CPCC08F220/18G02B1/005C08F220/14C08F222/102
Inventor 汪长春克里斯蒂安·格哈德·谢弗董旭吴攀
Owner FUDAN UNIV
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