Metal-dielectric hybrid nanostructures have recently drawn interest because of their direct coupling between metal surface plasmon resonance and dielectric electric dipoles leading to hybridized modes resulting in low losses and high field enhancements. Surface plasmon-coupled emission is a similar phenomenon that exploits the surface plasmon polaritons generated at the junction of dielectric and metal planar boundary. In this regard, we propose and demonstrate the use of dielectric nanotubes – Halloysite (HS) as spacer materials on metallic silver thin film. In this work, we selectively modified HS by acid or base treatment. Further they were loaded with silver nanoparticles (AgNPs) by solution deposition (in-situ method), thereby creating a metal-dielectric hybrid material. Selective acid and base treatment of HS nanotubes affected the surface charge distribution and aggregation of the nanotubes. Better dispersion ability and higher electronegativity behaviour was observed in base-treated HS that aided in higher loading of AgNPs. Enhanced interparticle plasmon coupling and better transmission of plasmon mediating energy was observed in base-treated HS-Ag that augmented dipole emission. The enhanced plasmon-coupled emission of HS-Ag nanostructures were also explored using a low-cost mobile phone as a detector to simplify the process of fluorescence detection.

金属-电介质杂化纳米结构由于其在金属表面等离子体共振和电介质偶极子之间的直接耦合而导致引起低损耗和高场增强的杂化模式，最近引起了人们的兴趣。表面等离激元耦合发射是一种类似的现象，它利用了在电介质和金属平面边界的交界处产生的表面等离激元极化子。在这方面，我们提出并证明了介电纳米管-埃洛石（HS）作为金属银薄膜上的隔离材料的用途。在这项工作中，我们通过酸或碱处理选择性地修饰了HS。此外，通过溶液沉积（原位方法）将银纳米颗粒（AgNPs）负载在银纳米颗粒上，从而形成金属-电介质混合材料。HS纳米管的选择性酸和碱处理影响了纳米管的表面电荷分布和聚集。在碱处理的HS中观察到更好的分散能力和更高的电负性行为，这有助于更高的AgNP负载量。在碱处理的HS-Ag中观察到增强的粒子间等离激元耦合和更好的等离激元介导能量传输，从而增加了偶极子发射。还使用低成本移动电话作为检测器来探索增强的HS-Ag纳米结构的等离激元耦合发射，以简化荧光检测的过程。在碱处理的HS-Ag中观察到增强的粒子间等离激元耦合和更好的等离激元介导能量传输，从而增加了偶极子发射。还使用低成本移动电话作为检测器来探索增强的HS-Ag纳米结构的等离激元耦合发射，以简化荧光检测的过程。在碱处理的HS-Ag中观察到增强的粒子间等离激元耦合和更好的等离激元介导能量传输，从而增加了偶极子发射。还使用低成本移动电话作为检测器来探索增强的HS-Ag纳米结构的等离激元耦合发射，以简化荧光检测的过程。