Fabrication process for three-dimensionally periodic structure of plasmonic nano-clusters formed in a confined space

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K21097
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 27:Chemical engineering and related fields
• Research Institution: Tohoku University
• Principal Investigator: Nagao Daisuke 東北大学, 工学研究科, 教授 (50374963)
• Project Period (FY): 2020-07-30 – 2022-03-31
• Keywords: プラズモニック / ナノ粒子 / 周期構造

Outline of Final Research Achievements

Two different approaches were conducted to obtain plasmonic nanoparticles periodically arranged with an appropriate distance apart. The first approach is a co-assembling of two types of particles with different materials and sizes. The second one is the use of core-shell structure of composite particles incorporating the plasmonic nanoparticles separated with the shell. For the plasmonic nanoparticles that have a high sedimentation velocity in suspension, it was indicated that the second approach is useful for three-dimensionally ordered plasmonic nanoparticles to exhibit intrinsically optical properties.

Free Research Field

材料化学工学

Academic Significance and Societal Importance of the Research Achievements

配列体を構成する粒子の屈折率と、粒子間隙に充填する流体の屈折率をマッチングさせることで、PLナノ粒子本来有する特異な光学特性を、PLナノ粒子の集積体から効率よく引き出せることを明らかにしたことで、追加の熱処理プロセスによって粒子間隙で生じるPLナノ粒子の接合も併用すれば、非球形PLナノ粒子の空間配置制御につながると言える。