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Numerical investigation of plasmonic properties of gold nanoshells

机译：金纳米壳的等离子体性能的数值研究

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We numerically investigated plasmonic properties of gold coated 300 run core shell particles (CS). It is known that the surface plasmon decays into the medium that encompasses the metal nanoparticle. This decay converts changes in the local refractive index into a frequency shift of the SPR. In this work, the core material was polystyrene and the shell was a thin gold layer. We showed that this CS exhibits two plasmonic modes in the visible-near infrared regime. The blue end plasmonic mode was confined at the core-metal dielectric interface and the red end plasmonic mode was attributed to a surface mode that depends on dielectric properties of the surrounding medium. The application of the red end plasmonic mode as a surface plasmon resonance (SPR) sensor revealed that it exhibits wavelength shift of 764±13 nm per refractive index unit change of the surrounding medium (nm/RIU). Potential biomedical applications of these sensors are discussed.
机译：我们数值研究了金涂层的300游动核壳颗粒（CS）的等离子体性能。已知表面等离子体激元衰减到包围金属纳米粒子的介质中。这种衰减将局部折射率的变化转换为SPR的频移。在这项工作中，核心材料是聚苯乙烯，外壳是薄金层。我们表明，这种CS在可见光-近红外区域表现出两种等离子体激元模式。蓝端等离子体模式限制在芯-金属介电界面，红端等离子体模式归因于表面模式，该模式取决于周围介质的介电特性。红端等离子体模式作为表面等离子体共振（SPR）传感器的应用表明，随着周围介质的折射率单位变化（nm / RIU），它呈现出764±13 nm的波长漂移。讨论了这些传感器的潜在生物医学应用。

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