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Preparing method for producing bright structure color material through strong electromagnetic resonance

An electromagnetic resonance and structural color technology, applied in the field of optics, can solve problems such as inability to achieve luminous enhancement or antenna application effects, weak electromagnetic resonance, etc., and achieve the effect of increased peak intensity and great practicability

Inactive Publication Date: 2018-09-28
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the literature has reported (literature) that a single medium refractive index microsphere has electromagnetic resonance phenomenon, but the electromagnetic resonance is very weak, and it cannot achieve the practical application effect as a luminescence enhancement or antenna

Method used

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  • Preparing method for producing bright structure color material through strong electromagnetic resonance
  • Preparing method for producing bright structure color material through strong electromagnetic resonance
  • Preparing method for producing bright structure color material through strong electromagnetic resonance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Based on the three-dimensional ordered structure of CdS dielectric microspheres to generate strong electromagnetic resonance and obtain the preparation process of cyan structural color, the specific preparation method is as follows:

[0031] 1. Preparation of Matrix Materials

[0032] Take a clean glass slide with a size of 2.5cm*2.5cm, mix the PDMS prepolymer and curing agent with a mass ratio of 10:1 with a homogenizer, and then spin-coat it on one side of the glass slide, set the speed of the homogenizer 8000rmp, time 40s. Transfer it to a heating plate, set the temperature at 90° C., and cure for 3 hours.

[0033] 2. Preparation of CdS dispersion

[0034] 0.2 g of CdS microspheres with particle diameters of 265 nm were weighed to form an aqueous dispersion with a mass fraction of 8 wt%, and ultrasonicated for 40 min.

[0035] 3. Preparation of three-dimensional ordered structure of CdS

[0036] A three-dimensional ordered structure with CdS microspheres as build...

Embodiment 2

[0038] Based on the highly ordered three-dimensional structure of CdS dielectric microspheres, the strong electromagnetic resonance phenomenon and the preparation process of green structural color are obtained. The specific preparation method is as follows:

[0039] 1. Preparation of Matrix Materials

[0040] Take a clean glass slide with a size of 2.5cm*2.5cm, wash it three times with deionized water and ethanol, and dry it for use.

[0041] 2. Preparation of CdS dispersion

[0042] 0.1 g of CdS microspheres with particle diameters of 310 nm were weighed, prepared into an ethanol dispersion with a mass fraction of 3 wt%, and ultrasonicated for 30 min.

[0043] 3. Preparation of three-dimensional ordered structure of CdS

[0044] A three-dimensional ordered structure with CdS microspheres as building units was obtained by vertical deposition. The specific steps are as follows: vertically immerse the glass slide in the ethanol dispersion of CdS microspheres, vacuumize, keep th...

Embodiment 3

[0046] Based on the three-dimensional ordered structure of CdS dielectric microspheres, the electromagnetic resonance phenomenon is produced and the orange-red structural color is obtained. The specific preparation method is as follows:

[0047] 1. Preparation of Matrix Materials

[0048] Cut out a waterproof photo paper with a size of 2cm*2cm. The substrate is a flexible substrate, and the substrate has undergone a certain waterproof treatment and has a certain degree of hydrophobicity. Its contact angle is about 63°.

[0049] 2. Preparation of CdS dispersion

[0050] 0.3 g of CdS microspheres with a particle diameter of 375 nm were weighed to form an aqueous dispersion with a mass fraction of 15 wt%, and ultrasonicated for 20 min.

[0051] 3. Preparation of three-dimensional ordered structure of CdS

[0052] A three-dimensional ordered structure with CdS microspheres as building units was obtained by horizontal evaporation-induced assembly. The specific steps are as follo...

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Abstract

The invention discloses a method for producing strong electromagnetic resonance and bright structure color based on a three-dimensional ordered structure of a medium-refractive-index material. Electromagnetic resonance peaks produced when medium-refractive-index dielectric microspheres interact with light in a visible region are subjected to coherent superposition by using the highly ordered three-dimensional structure, the intensity of the peaks is increased, and then the structure color can be observed. Besides, when the observation angle is small, the peak intensity of the electromagnetic resonance peaks is much higher than the intensity of reflection peaks of a photonic band gap, and the half peak width is much lower than the half peak width of the photonic band gap, that is, when theobservation angle is small, the structure color produced by the electromagnetic resonance peaks is higher in saturation and higher in brightness.

Description

technical field [0001] The invention relates to the field of optics, in particular to a preparation method for producing bright structural color materials through strong electromagnetic resonance. Background technique [0002] Light is an electromagnetic wave. When it interacts with a single dielectric nanosphere, the magnetic dipole and electric dipole resonance inside the microsphere are simultaneously excited and interfere with each other to generate electromagnetic resonance, resulting in a scattering peak (Naturecommunications, 2013, 4:1527). As the particle size of the microspheres increases, the electromagnetic resonance scattering peak undergoes a red shift (Advanced Materials, 2015, 27(45):7432-7439). Compared with plasmons, electromagnetic resonance has lower absorption loss, so it has broader development prospects in biosensors, solar cells, and information storage. However, there is a lack of such materials that can produce strong electromagnetic resonance scat...

Claims

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Application Information

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IPC IPC(8): C09K11/88B82Y20/00B82Y40/00G02B1/00
CPCB82Y20/00B82Y40/00C09K11/883G02B1/002
Inventor 武素丽刘宝琦吴越常杰张淑芬
Owner DALIAN UNIV OF TECH
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