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Room-Temperature Molecular Manipulation via Plasmonic Trapping at Electrified Interfaces

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Title: Room-Temperature Molecular Manipulation via Plasmonic Trapping at Electrified Interfaces
Authors: Oyamada, Nobuaki Browse this author
Minamimoto, Hiro Browse this author
Murakoshi, Kei Browse this author →KAKEN DB
Keywords: Optical Force
Plasmon Resonance
Surface-Enhanced Raman Scattering
Electrochemical Potential Control
Bi-Analyte Method
Issue Date: 2-Feb-2022
Publisher: American Chemical Society(ACS)
Journal Title: Journal of the American Chemical Society
Volume: 144
Issue: 6
Start Page: 2755
End Page: 2764
Publisher DOI: 10.1021/jacs.1c12213
Abstract: For the motion control of individual molecules at room temperature, optical tweezers could be one of the best approaches to realize desirable selectivity with high resolution in time and space. Because of physical limitations due to the thermal fluctuation, optical manipulation of small molecules at room temperature is still a challenging subject. The difficulty of the manipulation also emerged from the variation of molecular polarizability depending on the choice of molecules as well as the molecular orientation to the optical field. In this article, we have demonstrated plasmonic optical trapping of small size molecules with less than 1 nm at the gap of a single metal nanodimer immersed in an electrolyte solution. In situ electrochemical surface-enhanced Raman scattering measurements prove that a plasmonic structure under electrochemical potential control realizes not only the selective molecular condensation but also the formation of unique mixed molecular phases which is distinct from those under a thermodynamic equilibrium. Through detailed analyses of optical trapping behavior, we established the methodology of plasmonic optical trapping to create the novel adsorption isotherm under applying an optical force at electrified interfaces.
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of the American Chemical Society, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Type: article (author version)
Appears in Collections:総合化学院 (Graduate School of Chemical Sciences and Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小山田 伸明

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