FDTD-based structural color microsphere shell preparation method

Abstract

The invention provides an FDTD-based structural color microsphere shell preparation method, and the method comprises: 1, designing the structure of a structural color microsphere shell, including an inner phase, a shell layer coating the inner phase, and an outer phase located outside the shell layer, setting the refractive index of each component, constructing a microsphere shell model according to the structure of the structural color microsphere shell based on an FDTD algorithm, performing simulating by changing the structural parameters of the microsphere shell model to obtain the reflection spectrum of the structural color microsphere shell, establishing the relation between the structural parameters and the structural color, and determining the corresponding structural parameters according to the structural color required to be generated by the structural color microsphere shell; 2, introducing a multi-phase fluid into the capillary micro-fluidic chip, and adjusting the flow velocity of the external phase solution, the flow velocity of the shell layer material solution and the air pressure of the internal phase gas according to the structural parameters to prepare a liquid layer microsphere shell; 3, according to different shell layer material solutions, curing the liquid layer microsphere shell in a corresponding curing mode, and obtaining the structural color microsphere shell which is separated from the liquid environment and exists stably.

Description

technical field [0001] The invention belongs to the field of structural color materials, and in particular relates to a method for preparing structural color microsphere shells based on FDTD. Background technique [0002] Humans can perceive colorful colors because the optic nerve cells of the human eye have specific stimulus responses to light of different frequencies (350-750nm). The spectral distribution that enables humans to perceive color comes from the interaction between the medium and light. According to the different mechanism of color generation, it can be divided into pigmentation and structural formation (Rep.Prog.Phys.2008, 71, 076041.). Pigment color comes from the absorption of specific wavelengths of light by objects. The structural color is derived from some basic physical optical processes, such as reflection, refraction, interference, diffraction, scattering, etc. (RSCAdv.2013, 3, 14865.). Structurally colored objects can regulate the distribution of l...

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Problems solved by technology

[0006] In the prior art, the analysis of structural color is relatively complicated, and the reflectance spectrum of structural color materials cannot be quickly analyzed. Combining technologies to prepare structured light materials

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