Surface modification of Ag nanoparticles and their substrates for high sensitive plasmonic sensors

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04830
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 28030:Nanomaterials-related
• Research Institution: Kyoto Institute of Technology
• Principal Investigator: T KATSUMI 京都工芸繊維大学, 材料化学系, 教授 (80236348)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: イオンビーム / ナノ粒子 / ナノワイヤ / 表面・界面 / パターン形成 / ガラス / 表面コーティング / センサー

Outline of Final Research Achievements

First, the mechanism of deformation of fused and synthetic quartz glass caused by high-energy ion beams has been clarified. This is due to the densification caused by the increase in the number of three-membered ring structures of SiO4 tetrahedrons. The degree of deformation depends on the nuclear energy deposition given by the high-energy ions. Second, the VOC vapor response of Ag NP aggregates has been improved by ion irradiation and thin platinum layer deposition on them. Third, the site-selective growth of freestanding single-crystalline Au NWs at a low temperature (approximately 573 K) by pretreating a silicon substrate with low-energy ion beams, followed by thermal evaporation of Au, has been demonstrated. Using this method, Au NWs with aspect ratios up to 1000 or more, that is, 50-200 nm in diameter and lengths ranging from several hundred nanometers to approximately 100 μm, can be fabricated.

Free Research Field

放射線物性

Academic Significance and Societal Importance of the Research Achievements

イオン照射したAg NPsの化学的安定性を検討した結果、Ag NPs環境に応じたLSPR変化を発現することから、イオン照射 Ag NPsの環境センサーへの応用が期待できる。イオンビーム加工されたガラス基板上のイオン照射／PtコーティングAg NPs分散デバイスを用いることで、経時変化の少ない高感度VOCセンサーシステムを構築できる。