基于全介质纳米颗粒核壳结构复合物的电化学调谐散射研究

随着高性能光调控器件向微型化和低功耗化发展，如何实现纳米尺度单分子或单颗粒的光 调控尤为重要。过去几年，具有可调等离激元性质的贵金属等离激元纳米材料取得了可观的研究进展，因其具有较强的局部电磁场增强效应，适合纳米尺度下的光调控。但贵金属等离激元 纳米材料热效应明显，限制了其在光调控方面的广泛应用。最新研究表明，全介质纳米材料同样能产生强烈的电磁偶共振，然而目前基于单个全介质纳米颗粒的电化学调谐光学响应鲜少有报道。因此，本项目拟制备全介质纳米颗粒/导电聚合物核壳结构复合物并分析其光学性质，进一步将其作为电极材料组装成电化学电容器，研究复合纳米颗粒在循环伏安测试下的动态散射光谱调控过程，探究基于电化学氧化还原的光谱调制及其电致变色机理，优化制备具有精确光谱调控性能的复合颗粒。本项目将为全介质纳米材料在光学响应调控方面的应用提供新思路。

Recent years, with high performance optical manipulation devices are inclined to be miniaturized and low power consumption, therefore, it is particularly important to realize the optical manipulation based on single molecule or single particle at nanoscale. In the past few years, significant advances have been achieved in the design various noble metal plasmonic nanomaterials with controlled plasmonic properties, of which the strong near-field enhancement effect are suitable to implement light manipulating at nanoscale. However, the obvious high loss limit their applications in optical manipulating. The latest research showing that all-dielectric nanomaterials also have strong electric and magnetic dipole resonance modes. The study of electrichemical tuning optical responses based on single all-dielectric composite nanoparticle is barely reported at present. In this project, we will synthesize all-dielectric nanoparticles/conducting polymers core-shell nanostructures and , then electrochemical capacitor will be assembled with composite nanoparticles as electrode materials, then the process of dynamic scattering spectra manipulation will be studied under cyclic voltammetry tests. Furthermore, the mechanism of the scattering spectra manipulation and electrochromic behaviour based on electrochemical redox properties will be explored. It will provide an new effective approach for the application in optical responses manipulation for all-dielectric nanomaterials.