Magnetically Tunable Plasmon Coupling of Au Nanoshells Enabled by Space-Free Confined Growth
Magnetically Tunable Plasmon Coupling of Au Nanoshells Enabled by Space-Free Confined Growth
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DOI：
10.1021/acs.nanolett.0c03350
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发表时间：
2020-11-11
期刊：
影响因子：
10.8
通讯作者：
Yin, Yadong
中科院分区：
文献类型：
--
作者：
Li, Zhiwei;Fan, Qingsong;Yin, Yadong
我们报道了非常规的无空间限制生长的Au纳米壳具有明确的等离子体性质和主动调谐的等离子体耦合的纳米磁性组件。Au的种子生长仅发生在Fe 3 O 4核和酚醛树脂之间的软硬界面处，而不需要产生限制空间，这代表了各种核壳纳米结构的通用且优雅的方法。可渗透的酚醛层的可变形性在调节Au纳米壳的界面生长中起着至关重要的作用。虽然聚合物的弹性抑制了Au原子的径向沉积，但它们的高变形能力可以为共形金属壳的形成提供足够的空间。耦合的磁-等离子体性质允许通过将混合纳米颗粒磁性组装成等离子体链来主动调谐Au纳米壳的等离子体耦合和共振散射，其应用潜力已在设计透明显示器和防伪装置中得到证明。
We report the unconventional space-free confined growth of Au nanoshells with well-defined plasmonic properties and active tuning of their plasmon coupling by the nanoscale magnetic assembly. The seeded growth of Au exclusively occurred at the hard-soft interfaces between the Fe3O4 core and phenolic resin without the need of creating a limiting space, which represents a general and elegant approach to various core-shell nanostructures. The deformability of permeable phenolic layers plays an essential role in regulating the interfacial growth of Au nanoshells. While the polymer elasticity suppresses the radial deposition of Au atoms, their high deformability can afford enough spaces for the formation of conformal metallic shells. The coupled magnetic-plasmonic properties allow active tuning of the plasmon coupling and the resonant scattering of Au nanoshells by the magnetic assembly of the hybrid nanoparticles into plasmonic chains, whose potentials in applications have been demonstrated in designing transparent displays and anticounterfeiting devices.