Hybridized plasmon resonances in core/half-shell silver/cuprous oxide nanoparticles,Journal of Materials Chemistry C

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Hybridized plasmon resonances in core/half-shell silver/cuprous oxide nanoparticles
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2019/12/23 , DOI: 10.1039/c9tc06512a
Alexandra Gale-Mouldey _{1,

2,

3,

4} , Emma Jorgenson _{1,

2,

3,

4} , Jason P. Coyle _{1,

2,

3,

4} , Daniel Prezgot _{1,

2,

3,

4} , Anatoli Ianoul _{1,

2,

3,

4}

Affiliation

Core/shell nanoparticles are of interest due to their attractive optical, electronic, and catalytic properties. By combining these core/shell features with physical anisotropy of the shell – by selectively capping only a portion of the core – nanostructures with unique properties can be formed. This work presents the synthesis and investigates the plasmonic properties of silver nanocube (AgNC)/cuprous oxide core/half-shell nanoparticles. The developed partial shell growth technique is suitable for any room temperature two-step core/shell synthesis. Using this technique AgNC/Cu₂O core/shell nanoparticles were formed with a distinct half-shell morphology, either pyramidal or cubic, where the geometry of the half-shell can be precisely controlled by selecting specific synthesis conditions. Furthermore, the cuprous oxide half-shells induced hybridization of the plasmon modes in the silver core and thus enabled spatial and spectral manipulation of plasmon resonances for nanoparticles in suspension. The proposed core/half-shell morphology will be particularly advantageous for directed assembly, formation of dimers for SERS sensing, or as individual particles for catalysis.

中文翻译：

核/半壳银/氧化亚铜纳米粒子中的杂化等离子体共振

核/壳纳米粒子因其吸引人的光学，电子和催化特性而备受关注。通过将这些核/壳特征与壳的物理各向异性相结合-通过选择性地仅覆盖一部分核，可以形成具有独特性质的纳米结构。这项工作提出了合成，并研究了银纳米立方（AgNC）/氧化亚铜核/半壳纳米粒子的等离子体性能。发达的部分壳生长技术适用于任何室温下的两步核/壳合成。使用该技术AgNC / Cu ₂O核/壳纳米粒子形成具有明显的半壳形（金字塔形或立方形），其中可以通过选择特定的合成条件来精确控制半壳的几何形状。此外，氧化亚铜半壳诱导了银核中等离激元模的杂交，因此能够对悬浮液中的纳米粒子进行等离振子共振的空间和光谱操纵。所提出的核/半壳形态对于定向组装，形成用于SERS感测的二聚体或作为用于催化的单个颗粒将是特别有利的。

更新日期：2020-02-12

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