Development of high-speed nano-metric spectroscopy and its application for real-time analysis

2022 Fiscal Year Final Research Report

• Project/Area Number: 19H02562
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 28030:Nanomaterials-related
• Research Institution: Tokai University
• Principal Investigator: Tachizaki Takehiro 東海大学, 情報理工学部, 講師 (20632590)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: プローブ顕微鏡 / ラマン分光 / ナノテクノロジー / 薄膜・表界面 / 光計測

Outline of Final Research Achievements

Non-destructive real-time spectroscopic analysis with nanometer spatial resolution was researched and developed. In this development, a plasmon mediated nano-optical probe with highly efficient, highly stable, wide-spectral range, and long lifetime was developed and applied to a demonstration using a self-assembled monolayer molecular film on the cristalline gold surface. This demonstrated showed that the tip-enhanced Raman spectroscopy using newly developed nano-optical probe can stably capture characteristic spectra every second for more than one hour. We also performed tip-enhanced Raman spectroscopy on a single-crystal diamond substrate, and confirmed that the electric field enhancement of our nano-optical probe showed equal to or greater than that of previously reported nano-optical probes, and that it is suitable for practical use.

Free Research Field

光計測

Academic Significance and Societal Importance of the Research Achievements

非破壊的手段でナノメートル空間分解能を実現し、高効率・広帯域・高安定・長寿命をも達成する計測・分析技術を確立できた。本技術は、経時変化する物質・現象の変化を追跡して計測することができ、物質や現象の理解を深めることに貢献する。また、高速で高安定であるため二次元的な分光分析も可能であるなど、化学的分析への貢献も意義深い。特に、創出したナノ光プローブは、単一構造で可視光から赤外域までの広帯域で分光分析が可能である。これは有機物の分析にも大きな力を発揮するため、本研究開発の成果は非常に意義深い。