Humidity-adjustable hydrogel colorful structural color preparation method

Abstract

The invention relates to the field of nano structural colors, and provides a humidity-adjustable hydrogel multi-color structural color preparation method aiming at the problems that an existing structural color preparation method is complex in operation and not easy to regulate and control, the humidity-adjustable hydrogel multi-color structural color preparation method comprises the following steps: a) firstly depositing a bottom metal layer on a substrate, and then uniformly spin-coating a polyvinyl alcohol solution to form a middle polyvinyl alcohol hydrogel layer; b) carrying out electron beam exposure and water washing on the product in the step a), and forming a nano-structure when the irradiated area is not dissolved by water; and c) depositing an upper metal layer on the nanostructure obtained in the step b) to obtain a hydrogel nanostructure consisting of the bottom metal layer, the middle layer and the upper metal layer, and generating different color responses under the regulation and control of a humidity device. A high-precision hydrogel nanostructure is formed by electron beam exposure, and the hydrogel still keeps rapid water absorption expansion response to humidity change after exposure, so that different color responses are generated by regulating and controlling humidity, and dynamic color adjustment is achieved.

Description

technical field [0001] The invention relates to the field of nanostructured color, in particular to a method for preparing a hydrogel multicolored structural color with adjustable humidity. Background technique [0002] Structural colors can produce more vivid and stable colors than dyes and pigments due to the inherently high scattering / absorption efficiency of dielectrics or metals. Structural color relies on the interaction between incident light and structural design, and vivid colors can be produced with metals or dielectrics by changing the geometry, size, or arrangement of structures during fabrication. Dynamic structural color utilizes designable and tunable geometrically correlated resonances, and has important applications in encryption, information security, anti-counterfeiting, and colorimetric sensing. [0003] After searching the prior art, it is found that there are many existing methods for preparing structural colors, but most of them are complicated to ope...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems that the existing structural color preparation methods are complicated to operate and difficult to control, the present invention provides a humidity-adjustable hydrogel multicolor structural color preparation method, based on polyvinyl alcohol negative resist as a dielectric layer, using Electron beam exposure forms a high-precision hydrogel nanostructure. After exposure, the hydrogel still maintains a rapid water absorption and expansion response to humidity changes, so that different color responses can be produced by adjusting the humidity to achieve dynamic color adjustment.

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