| 초록 |
Metal nanoparticles (NPs) assembly with a tiny gap of less than a few nanometers has been extensively studied as an energy-donor for plasmonic enhancement. Quality factor determined by the number of electromagnetic fields per mode volume dictates plasmonic enhancement for energy transfer. For example, metal NPs assembly with low quality factors has limitations in enhancing the energy transfer from NP to nearby energy-acceptors such as quantum dots, upconversion NPs, and organic fluorophores. Therefore, modulation of plasmonic coupling of metal NPs has a significant impact on the energy transfer process. Here, we propose a heterogeneous assembly of colloidal NPs for improved energy transfer with improved quality factor combining a lateral plasmonic nanocavity with a metal film. By transferring a heterogeneous assembly formed using two types of NPs with different surface properties to a metal film, a heterogeneous assembly of colloidal NPs was fabricated, and optical properties were investigated. |
