Zirconium oxide sol capable of regulating refractive index based on electric field, preparation method and application thereof

By modifying the azobenzene molecules on zirconia nanoparticles and realizing their isomerization transformation under the action of electric field, the problems of slow response and high cost of traditional refractive index regulation are solved, and dynamic regulation of the refractive index of zirconia sol is achieved, which is suitable for a variety of high-performance optical devices.

CN119750642AActive Publication Date: 2025-04-04ZHEJIANG UNIV OF TECH +1
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Patent Information

Application Number
CN202510031189.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-08
Publication Date
2025-04-04
Estimated Expiration
2045-01-08

AI Technical Summary

Technical Problem

Traditional refractive index control methods such as thermal and acousto-optical effects have problems such as slow response, high energy consumption and high equipment costs. In addition, traditional zirconia sol preparation processes are difficult to achieve adjustable particle size and cannot meet the diverse optical application needs.

Method used

By fusing azobenzene with zirconia nanoparticles with adjustable particle size, a composite system is constructed. Under the action of an electric field, the azobenzene molecules undergo isomerization transformation, changing the microscopic electromagnetic environment around the zirconia nanoparticles, and dynamic regulation of the system's refractive index is achieved.

Benefits of technology

It has achieved meticulous and reversible regulation of the refractive index of zirconia sol, improved regulation sensitivity, and is suitable for high-performance optical devices such as intelligent optical switches, tunable optical filters and dynamic focus lenses, and promoted the miniaturization, intelligence and multifunctional development of optical materials and optoelectronic devices.

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Abstract

The invention discloses a preparation method of zirconium oxide sol capable of regulating and controlling refractive index based on an electric field, and belongs to the technical field of nano materials, the preparation method comprises the following steps: adding a zirconium source and a chelating agent into an organic solvent to prepare a precursor solution; adding an alkali source into an organic solvent to prepare a pH regulator; simultaneously dropwise adding the precursor solution and a pH regulator into the organic solvent, and heating in an oil bath to give play to the organic solvent, so as to obtain zirconium oxide sol; the preparation method comprises the following steps: dissolving an azobenzene compound in an organic solvent to prepare an azobenzene modifier, adding the azobenzene modifier into zirconium oxide sol, and stirring to obtain azobenzene modified zirconium oxide sol. The particle size of the zirconia sol is regulated and controlled by adding the pH regulator and the chelating agent, then the refractive index is regulated and controlled, the zirconia sol is endowed with the electric field response characteristic through azobenzene modification, fine and reversible regulation and control of the refractive index of the sol by an electric field are achieved, and the refractive index is dynamically regulated and controlled through the electric field to meet the requirements of complex scenes.
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