Construction of NIR enhancement devices via the combination of Ag nanoplates and functional complexes on substrates

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05491
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 34010:Inorganic/coordination chemistry-related
• Research Institution: Yamagata University
• Principal Investigator: KANAIZUKA KATSUHIKO 山形大学, 理学部, 教授 (50457438)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 近赤外 / ナノ界面 / 電子移動 / 増強 / 微粒子

Outline of Final Research Achievements

Metal nanoparticles (NPs) exhibit an unique optical property called as a localized surface plasmon resonance (LSPR), which induces an enhanced electric field in the nearby nano space of the NPs. The enhanced electric field enhances the absorption and Raman scattering of the surrounding molecules. Among the various shapes of AgNPs, the triangular Ag nanoplates (AgTNP) are one of the most interesting nanomaterials because of their broad absorption in the near-infrared region and the strong electric field. In this study, we prepared a AgNPs dispersion solution containing the AgTNP and spherical AgNPs and explored a simple method to obtain the substrate only fixed the AgTNP. The edge length of the synthesized AgTNP is 35-65 nm. The spherical AgNPs were not observed on the substrate after the tape peeling method.

Free Research Field

無機化学

Academic Significance and Societal Importance of the Research Achievements

低エネルギーの有効利用の観点から，バイオイメージング，シースルー太陽電池，フォトンアップコンバージョンなどのデバイスアプリケーションへの貢献が期待できる。本研究では、テープ剥離によって、球状銀ナノ粒子と銀ナノプレートが固定された基板から、球状銀ナノ粒子のみが選択的に剥離できることを見出した。本手法によって作成された銀ナノプレート基板を用いることで、今後、増強光電流やSERSにおける銀ナノプレートの効果を精密に判断できるようになると考えている。