Molecular manipulation by plasmon induced optical force at solid-liquid interface under ambient condition

Nobuaki Oyamada; Hiro Minamimoto; Kei Murakoshi

doi:10.1117/12.2573519

15 June 2020 Molecular manipulation by plasmon induced optical force at solid-liquid interface under ambient condition

Nobuaki Oyamada, Hiro Minamimoto, Kei Murakoshi

Proceedings Volume 11522, Optical Manipulation and Structured Materials Conference 2020; 1152204 (2020) https://doi.org/10.1117/12.2573519
Event: SPIE Technologies and Applications of Structured Light, 2020, Yokohama, Japan

Abstract

It has been expected that the gradient force in the electric field induced by the excitation of the localized surface plasmon resonance (LSPR) could retard the molecular Brownian motion, if molecules has enough polarizability to generate optical force beyond thermal fluctuation. In this study, we have attempted to observe the optical molecular manipulation at the gap of plasmonic bow-tie nanostructures in the bi-analyte solution of molecules. Through the evaluation of the surface diffusion process by electrochemical surface-enhanced Raman scattering (SERS) measurements, it has been found that the control of the electrochemical potential of the metal nanostructures realized the molecular selective manipulation. In addition, we have successfully observed the formation of unique phase of molecule condensation at electrified interface.

Citation Download Citation

Nobuaki Oyamada, Hiro Minamimoto, and Kei Murakoshi "Molecular manipulation by plasmon induced optical force at solid-liquid interface under ambient condition", Proc. SPIE 11522, Optical Manipulation and Structured Materials Conference 2020, 1152204 (15 June 2020); https://doi.org/10.1117/12.2573519

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