Non-metallic localized surface plasmon resonance material and preparation method thereof

By employing a strategy of UV-induced proton intercalation and dialysis-assisted stabilization, oxygen vacancy-dominated MoO3-x quantum dot materials were prepared. This solved the problem of weak and unstable response of MoO3-x nanomaterials in the visible light region in existing technologies, achieving strong plasmon resonance and long-term stability in the visible light region, thus expanding its application potential.

CN122403508APending Publication Date: 2026-07-17ZHEJIANG UNIV

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Filing Date
2026-03-17
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies struggle to prepare MoO3-x nanomaterials with uniform size and strong, tunable local surface plasmon resonance response in the visible light region under mild conditions, and their poor stability in air limits their practical applications.

Method used

By employing a strategy of UV-induced proton intercalation combined with dialysis-assisted stabilization, and by controlling the pH value of the precursor solution and the amount of polyethylene glycol, oxygen vacancy-dominated MoO3-x quantum dot materials were prepared, achieving continuous regulation of LSPR peak positions and long-term stability.

Benefits of technology

A strong, tunable local surface plasmon resonance absorption peak was successfully achieved in the visible light region and maintained long-term stability in air, expanding the application range of the material, especially in the fields of photocatalysis and photoelectric detection with greater potential.

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Abstract

本发明涉及等离激元光子学技术,旨在提供一种非金属局域表面等离激元共振材料及其制备方法。包括:调节钼酸铵溶液为酸性,加入聚乙二醇溶液混合均匀,在持续搅拌下使用波长365 nm的紫外光进行照射;当溶液颜色由无色变为深蓝绿色时,得到含有氢插层中间体HxMoO3的胶体溶液;进行透析处理去除游离的酸、离子及小分子副产物;经冷冻干燥后得到由氧空位主导的稳定的MoO3‑x量子点材料。本发明制备流程简单、能耗低、安全性高,将LSPR响应从常规的近红外区有效拓展至可见光区,以及连续、精细且可预测的调控;制得的量子点具有超小尺寸和良好分散性,兼具了量子限域效应与显著的等离激元特性,自由载流子密度又足以支持强烈的LSPR效应,具有极大应用潜力。
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