Zheng Yang, Li Lixia, Zong Xueyang, Geng Zhenduo, Li Wanlu, Liu Yufang
Appl Opt. 2023 Oct 10;62(29):7706-7712. doi: 10.1364/AO.499639.
Surface plasmon resonance based on nanostructures has been a powerful analytical tool in rapid detection and analysis of biomolecules. However, the fabrication of nanostructure sensors, such as electron beam lithography and focused ion beam milling, has inherent defects as manufacturing cost, complex process flow, and small fabrication area. In this paper, using the transfer nanoprinting approach based on an ultrathin anodic aluminum oxide membrane, a centimeter-scale ordered periodic Ag-ZnS bilayer nanodisk on Au film with a low cost and simple process is fabricated. A surface plasmon polariton Bloch mode from nanodisk arrays is experimentally demonstrated at normal incident of light. The plasmonic platform exhibits an ideal refractive index bulk sensitivity of up to 438 nm/RIU. Furthermore, by using a polyelectrolyte bilayer with well-defined thickness, the surface sensitivity of the biosensing platform is also investigated. The large-scale plasmonic bilayer nanoparticle biosensing platform has broad application prospects in development of low-cost and high-performance biosensing chips.
基于纳米结构的表面等离子体共振已成为生物分子快速检测与分析的强大分析工具。然而，纳米结构传感器的制造，如电子束光刻和聚焦离子束铣削，存在制造成本高、工艺流程复杂和制造面积小等固有缺陷。本文采用基于超薄阳极氧化铝膜的转移纳米压印方法，以低成本、简单的工艺在金膜上制备了厘米级有序周期性Ag-ZnS双层纳米盘。通过实验证明了在光垂直入射时纳米盘阵列的表面等离子体激元布洛赫模式。该等离子体平台展现出高达438 nm/RIU的理想体折射率灵敏度。此外，通过使用具有明确厚度的聚电解质双层，还研究了生物传感平台的表面灵敏度。大规模等离子体双层纳米粒子生物传感平台在低成本、高性能生物传感芯片的开发中具有广阔的应用前景。
